The 50/30/20 Budgeting Rule: Real-Life Examples for Financial Success

The 50/30/20 Budgeting Rule: Real-Life Examples for Financial Success
The 50/30/20 Budgeting Rule: Real-Life Examples for Financial Success

The 50/30/20 budgeting rule is a time-honored financial strategy that has stood the test of time, and in 2025, it continues to be a beacon of financial wisdom for individuals seeking to master their personal finances. This budgeting method, which allocates 50% of after-tax income to essential needs, 30% to discretionary wants, and 20% to savings and investments or debt repayment, offers a straightforward yet powerful approach to balancing financial obligations while planning for the future. Let's delve into the intricacies of this rule, explore real-life examples, and understand how it can pave the way to financial success.

Understanding the 50/30/20 Budgeting Rule

The 50/30/20 budgeting rule is designed to provide a clear and simple framework for managing your money. This rule was popularized by Senator Elizabeth Warren in her book "All Your Worth: The Ultimate Lifetime Money Plan." The beauty of this rule lies in its simplicity and flexibility, making it accessible to individuals at various stages of their financial journey. Here’s a detailed breakdown of each category:

  1. Needs (50%): This category includes essential expenses that are necessary for day-to-day living. These expenses typically include housing, groceries, utilities, insurance, minimum debt payments, and transportation. For example, if your monthly income after taxes is $3,000, you should aim to spend no more than $1,500 on these essential needs. It's crucial to prioritize these expenses as they are non-negotiable and form the foundation of your financial stability.

    • Housing: This is often the largest expense in the needs category. It includes rent or mortgage payments, property taxes, and home insurance. For instance, if you live in an apartment, your rent should ideally be around 25-30% of your after-tax income, leaving room for other essential expenses. To manage housing costs, consider the following tips:

      • Downsize: If your current housing situation is too expensive, consider downsizing to a smaller apartment or home. This can significantly reduce your rent or mortgage payments.

      • Roommates: If you have extra space, consider getting a roommate to split the rent. This can help you save money and build a sense of community.

      • Negotiate: If you're renting, don't be afraid to negotiate your rent, especially if you've been a good tenant. Landlords may be willing to offer a discount or freeze your rent to keep you as a tenant.

      • Refinance: If you own a home, consider refinancing your mortgage to secure a lower interest rate. This can help you save money on interest charges and reduce your monthly payments.

    • Groceries: Food is a basic necessity, but it's easy to overspend in this category. Planning meals, making a grocery list, and sticking to it can help you stay within your budget. Consider using coupons, buying in bulk, and choosing store-brand items to save money. Here are some additional tips:

      • Meal Plan: Plan your meals for the week before grocery shopping. This can help you avoid impulse buys and ensure you have all the ingredients you need.

      • Shop Sales: Pay attention to sales and promotions at your local grocery store. Buying items on sale can help you save money and stock up on essentials.

      • Buy in Bulk: Consider buying non-perishable items in bulk. This can help you save money in the long run and reduce the frequency of grocery trips.

      • Choose Store-Brand: Store-brand items are often cheaper than name-brand items and just as good. Consider switching to store-brand items to save money.

    • Utilities: This includes electricity, water, gas, and internet services. To manage these costs, consider energy-efficient practices, such as using LED bulbs, unplugging unused electronics, and adjusting your thermostat. Here are some additional tips:

      • Energy-Efficient Appliances: Consider investing in energy-efficient appliances. They may cost more upfront, but they can save you money in the long run by reducing your energy bills.

      • Unplug Electronics: Unplug electronics when they're not in use. Even when turned off, many electronics continue to draw power, which can add up over time.

      • Adjust Thermostat: Adjust your thermostat to save money on heating and cooling. In the winter, set your thermostat to 68°F during the day and 62°F at night. In the summer, set it to 78°F during the day and 82°F at night.

    • Insurance: This includes health, auto, and renter's or homeowner's insurance. While it's tempting to opt for the cheapest plans, ensure you have adequate coverage to protect yourself from financial catastrophes. Here are some tips:

      • Shop Around: Don't settle for the first insurance quote you receive. Shop around and compare prices from different providers to ensure you're getting the best deal.

      • Bundle Policies: Consider bundling your insurance policies. Many insurance companies offer discounts if you bundle your auto, home, and other insurance policies with them.

      • Increase Deductibles: Increasing your deductibles can lower your premiums. However, make sure you have enough savings to cover the deductible in case of an emergency.

    • Minimum Debt Payments: This includes credit card payments, student loans, and car loans. Always pay at least the minimum amount due to avoid late fees and damage to your credit score. However, aim to pay more than the minimum to accelerate debt repayment. Here are some tips:

      • Pay More Than the Minimum: Paying more than the minimum can help you pay off your debt faster and save money on interest charges.

      • Focus on High-Interest Debt: If you have multiple debts, focus on paying off the one with the highest interest rate first. This can help you save money on interest charges and pay off your debt faster.

      • Consider Debt Consolidation: If you have multiple high-interest debts, consider consolidating them into a single, lower-interest loan. This can help you save money on interest charges and simplify your debt repayment process.

    • Transportation: This includes car payments, gas, public transportation, and maintenance. To save money, consider carpooling, using public transportation, biking, or walking when possible. Here are some additional tips:

      • Carpool: If you have friends or coworkers who live near you, consider carpooling to work or other destinations. This can help you save money on gas and reduce wear and tear on your vehicle.

      • Public Transportation: If public transportation is available in your area, consider using it instead of driving. This can help you save money on gas, parking, and vehicle maintenance.

      • Bike or Walk: If you live close to your workplace or other destinations, consider biking or walking instead of driving. This can help you save money on gas and vehicle maintenance, and it's also good for your health.

  2. Wants (30%): This category covers non-essential lifestyle expenses that enhance your quality of life but are not crucial for survival. These can include dining out, entertainment, vacations, luxury items, and subscriptions. Using the same $3,000 income example, you would allocate $900 to these discretionary wants. The key to managing this category is to differentiate between wants and needs and to prioritize your spending based on your values and goals.

    • Dining Out: While it's convenient to eat out, it can quickly add up. Try to limit dining out to special occasions or use coupons and discounts when available. Consider meal prepping at home to save money and time. Here are some additional tips:

      • Cook at Home: Cooking at home is generally cheaper than dining out. Try to cook at home as much as possible and save dining out for special occasions.

      • Use Coupons: Look for coupons or discounts for restaurants you frequent. Many restaurants offer discounts on certain days or times.

      • Share Meals: When dining out, consider sharing meals with friends or family. This can help you save money and reduce food waste.

    • Entertainment: This includes movies, concerts, and other leisure activities. Look for free or discounted events in your community, such as local festivals, parks, and museums with free admission days. Here are some additional tips:

      • Free Events: Look for free events in your community. Many cities offer free concerts, movies, and other entertainment options.

      • Discounts: Look for discounts on entertainment activities. Many museums, zoos, and other attractions offer discounted admission on certain days or times.

      • Host at Home: Instead of going out, consider hosting movie nights or game nights at home. This can be a fun and affordable way to entertain friends and family.

    • Vacations: Travel can be expensive, but it's possible to enjoy a vacation on a budget. Consider off-peak travel, all-inclusive packages, or road trips to save money. Here are some additional tips:

      • Off-Peak Travel: Traveling during the off-peak season can help you save money on flights, accommodations, and attractions.

      • All-Inclusive Packages: All-inclusive packages can help you save money by bundling flights, accommodations, and meals into a single price.

      • Road Trips: Road trips can be a fun and affordable way to travel. Consider planning a road trip to a nearby destination.

    • Luxury Items: These are non-essential items that you desire but can live without. Before making a purchase, ask yourself if it's something you truly need or if it's an impulse buy. Consider waiting 24-48 hours before making a purchase to avoid buyer's remorse. Here are some additional tips:

      • Need vs. Want: Before making a purchase, ask yourself if it's a need or a want. If it's a want, consider if it's something you can live without.

      • Wait 24-48 Hours: Before making a purchase, wait 24-48 hours. This can help you avoid impulse buys and ensure you're making a thoughtful decision.

      • Set a Budget: Set a budget for luxury items and stick to it. This can help you avoid overspending and ensure you're prioritizing your financial goals.

    • Subscriptions: This includes streaming services, gym memberships, and magazine subscriptions. Regularly review your subscriptions and cancel any that you no longer use or need. Consider sharing subscriptions with family or friends to split the cost. Here are some additional tips:

      • Review Subscriptions: Regularly review your subscriptions and cancel any that you no longer use or need. This can help you save money and reduce clutter.

      • Share Subscriptions: Consider sharing subscriptions with family or friends. This can help you split the cost and save money.

      • Free Trials: Be cautious of free trials. Many companies automatically charge you after the trial period ends, so make sure to cancel before the trial ends if you don't want to continue the service.

  3. Savings and Investments (20%): This category is dedicated to building your financial future. It includes retirement contributions, savings accounts, additional debt repayments, and investments. With a $3,000 income, you would set aside $600 for savings and investments. The goal is to build an emergency fund, save for long-term goals, and invest for growth.

    • Emergency Fund: Aim to save 3-6 months' worth of living expenses for unexpected events, such as job loss, medical emergencies, or home repairs. Start by saving a small amount each month and gradually increase it as your financial situation improves. Here are some additional tips:

      • Start Small: Start by saving a small amount each month. Even a little bit can add up over time.

      • Increase Gradually: As your financial situation improves, gradually increase the amount you save each month.

      • Keep it Separate: Keep your emergency fund separate from your regular savings. This can help you avoid the temptation to spend it on non-emergencies.

    • Retirement Savings: Contribute to retirement accounts, such as a 401(k) or IRA. Take advantage of employer matches, if available, as this is essentially free money. The power of compound interest makes time your best friend when it comes to retirement savings. Here are some additional tips:

      • Employer Match: If your employer offers a match, contribute at least up to the match. This is essentially free money.

      • Start Early: The earlier you start saving for retirement, the more time your money has to grow.

      • Diversify: Diversify your retirement savings by investing in a mix of stocks, bonds, and other assets. This can help you spread risk and maximize returns.

    • Additional Debt Repayments: If you have high-interest debt, such as credit cards, consider allocating more than the minimum payment to pay it off faster. This can save you money on interest charges and improve your credit score. Here are some additional tips:

      • High-Interest Debt: Focus on paying off high-interest debt first. This can help you save money on interest charges and pay off your debt faster.

      • Snowball Method: Consider using the snowball method to pay off debt. This involves paying off your smallest debts first, regardless of interest rate, and then moving on to the next smallest debt.

      • Avalanche Method: Consider using the avalanche method to pay off debt. This involves paying off your highest-interest debt first and then moving on to the next highest-interest debt.

    • Investments: Consider investing in stocks, bonds, mutual funds, or real estate to grow your wealth over time. Diversify your portfolio to spread risk and consult with a financial advisor if needed. Here are some additional tips:

      • Diversify: Diversify your investment portfolio by investing in a mix of stocks, bonds, and other assets. This can help you spread risk and maximize returns.

      • Long-Term: Invest for the long term. The stock market can be volatile in the short term, but it tends to trend upward over the long term.

      • Consult a Financial Advisor: Consider consulting with a financial advisor to help you make informed investment decisions.

Real-Life Examples of the 50/30/20 Rule in Action

To illustrate the practical application of the 50/30/20 rule, let's consider a few real-life scenarios:

Example 1: The Young Professional

Meet Sarah, a 28-year-old marketing specialist living in a mid-sized city. Sarah earns $4,000 per month after taxes. According to the 50/30/20 rule:

  • Needs (50%): Sarah allocates $2,000 to her essential expenses, which include rent ($1,000), groceries ($400), utilities ($200), health insurance ($150), and a car payment ($250). To manage her housing cost, Sarah lives in a modest apartment and considers getting a roommate to split the rent. She also shops at a local farmer's market for fresh produce and uses coupons for grocery shopping. Additionally, she uses energy-efficient practices to reduce her utility bills, such as using LED bulbs and unplugging unused electronics.

  • Wants (30%): Sarah spends $1,200 on discretionary items such as dining out ($300), gym membership ($100), entertainment ($400), and a streaming service subscription ($100). To save money on entertainment, Sarah looks for free events in her community and invites friends over for movie nights instead of going to the theater. She also cancels her gym membership and exercises outdoors or at home using free online workout videos. Additionally, she limits her dining out to special occasions and uses coupons or discounts when available.

  • Savings and Investments (20%): Sarah saves $800, which she divides between her emergency fund ($400), retirement savings ($200), and additional payments towards her student loan ($200). Sarah aims to build an emergency fund covering 3-6 months of living expenses. She also contributes to her 401(k) and takes advantage of her employer's match. Additionally, she makes extra payments on her student loan to pay it off faster and save on interest. She also considers investing in a diversified portfolio to grow her wealth over time.

Example 2: The Freelancer

John is a 35-year-old freelance graphic designer with a variable income. On average, he earns $5,000 per month after taxes. Applying the 50/30/20 rule:

  • Needs (50%): John allocates $2,500 to his essential expenses, which include rent ($1,200), groceries ($500), utilities ($300), health insurance ($250), and a car payment ($250). To manage his housing cost, John lives in a studio apartment and considers downsizing to a smaller place or getting a roommate. He also cooks at home more often and buys groceries in bulk to save money. Additionally, he uses energy-efficient practices to reduce his utility bills, such as adjusting his thermostat and using energy-efficient appliances.

  • Wants (30%): John spends $1,500 on discretionary items such as travel ($600), hobbies ($400), and dining out ($500). To save money on travel, John looks for affordable destinations, travels during the off-peak season, and uses travel rewards credit cards. He also finds free or low-cost hobbies, such as hiking or painting, and limits dining out to special occasions. Additionally, he looks for free or discounted events in his community for entertainment.

  • Savings and Investments (20%): John saves $1,000, which he invests in a diversified portfolio ($500), contributes to his retirement account ($300), and sets aside for future business expenses ($200). John aims to build a diversified investment portfolio to grow his wealth over time. He also contributes to his IRA and takes advantage of tax benefits. Additionally, he sets aside money for future business expenses, such as equipment upgrades or marketing campaigns. He also considers consulting with a financial advisor to help him make informed investment decisions.

Example 3: The Family of Four

Meet the Johnson family, consisting of parents Alex and Jamie, and their two children, aged 5 and 8. Alex works as a software engineer, and Jamie is a stay-at-home parent. Their combined after-tax income is $7,000 per month. Applying the 50/30/20 rule:

  • Needs (50%): The Johnsons allocate $3,500 to their essential expenses, which include mortgage ($1,500), groceries ($800), utilities ($300), health insurance ($350), car payments ($250), and childcare ($300). To manage their housing cost, the Johnsons live in a modest home and consider refinancing their mortgage to secure a lower interest rate. They also meal plan and buy groceries in bulk to save money. Additionally, they use energy-efficient practices to reduce their utility bills, such as using LED bulbs and adjusting their thermostat.

  • Wants (30%): The Johnsons spend $2,100 on discretionary items such as family outings ($600), children's activities ($500), dining out ($500), and a streaming service subscription ($100). To save money on family outings, the Johnsons look for free or discounted events in their community, such as local festivals, parks, and museums with free admission days. They also enroll their children in low-cost or free after-school programs and limit dining out to special occasions. Additionally, they look for free or discounted entertainment options, such as community events or library programs.

  • Savings and Investments (20%): The Johnsons save $1,400, which they divide between their emergency fund ($500), retirement savings ($400), college savings ($300), and additional debt repayments ($200). The Johnsons aim to build an emergency fund covering 3-6 months of living expenses. They also contribute to their 401(k)s and take advantage of employer matches. Additionally, they contribute to a 529 college savings plan for their children and make extra payments on their car loan to pay it off faster and save on interest. They also consider investing in a diversified portfolio to grow their wealth over time.

Example 4: The Recent Graduate

Meet Emily, a 23-year-old recent college graduate who has just started her first job as a software developer. She earns $3,500 per month after taxes. Applying the 50/30/20 rule:

  • Needs (50%): Emily allocates $1,750 to her essential expenses, which include rent ($800), groceries ($350), utilities ($150), health insurance ($150), and student loan payments ($300). To manage her housing cost, Emily lives in a modest apartment and considers getting a roommate to split the rent. She also shops at a local farmer's market for fresh produce and uses coupons for grocery shopping. Additionally, she uses energy-efficient practices to reduce her utility bills, such as using LED bulbs and unplugging unused electronics.

  • Wants (30%): Emily spends $1,050 on discretionary items such as dining out ($300), entertainment ($300), travel ($200), and a gym membership ($250). To save money on entertainment, Emily looks for free events in her community and invites friends over for movie nights instead of going to the theater. She also limits her dining out to special occasions and uses coupons or discounts when available. Additionally, she looks for affordable travel destinations and uses travel rewards credit cards to save money.

  • Savings and Investments (20%): Emily saves $700, which she divides between her emergency fund ($300), retirement savings ($200), and additional payments towards her student loan ($200). Emily aims to build an emergency fund covering 3-6 months of living expenses. She also contributes to her 401(k) and takes advantage of her employer's match. Additionally, she makes extra payments on her student loan to pay it off faster and save on interest. She also considers investing in a diversified portfolio to grow her wealth over time.

Example 5: The Retiree

Meet Tom, a 65-year-old retiree who lives on a fixed income of $3,000 per month. Applying the 50/30/20 rule:

  • Needs (50%): Tom allocates $1,500 to his essential expenses, which include mortgage ($700), groceries ($300), utilities ($150), health insurance ($150), and medication ($200). To manage his housing cost, Tom lives in a modest home and considers downsizing to a smaller place or renting out a room to generate additional income. He also shops at a local farmer's market for fresh produce and uses coupons for grocery shopping. Additionally, he uses energy-efficient practices to reduce his utility bills, such as using LED bulbs and adjusting his thermostat.

  • Wants (30%): Tom spends $900 on discretionary items such as dining out ($300), entertainment ($300), travel ($200), and hobbies ($100). To save money on entertainment, Tom looks for free events in his community and invites friends over for game nights instead of going out. He also limits his dining out to special occasions and uses coupons or discounts when available. Additionally, he looks for affordable travel destinations and uses travel rewards credit cards to save money.

  • Savings and Investments (20%): Tom saves $600, which he invests in a diversified portfolio ($300), contributes to his retirement account ($100), and sets aside for future medical expenses ($200). Tom aims to build a diversified investment portfolio to grow his wealth over time. He also contributes to his IRA and takes advantage of tax benefits. Additionally, he sets aside money for future medical expenses, such as long-term care or unexpected medical bills. He also considers consulting with a financial advisor to help him make informed investment decisions.

Challenges and Adaptations

While the 50/30/20 rule is easy to remember and serves as a good starting point, it may not fit everyone's financial situation perfectly. For instance, individuals living in high-cost cities like New York or San Francisco often find that housing alone can exceed the 50% allocation for needs. Similarly, those with significant student loan debt or a low income might need to modify the allocations to suit their financial realities.

For example, if your essential expenses exceed 50%, consider options to reduce costs, such as downsizing housing, cooking at home more often, or carpooling. Discipline in managing the wants category is vital to avoid spending that could undermine savings goals. Establishing this budgeting framework early, especially for young adults, can foster financial discipline and build a strong foundation for long-term financial health.

Here are some tips to adapt the 50/30/20 rule to your specific needs:

  • High-Cost Cities: If you live in an expensive city, consider adjusting the percentages to accommodate your higher cost of living. For example, you might allocate 60% to needs, 20% to wants, and 20% to savings and investments. Look for ways to reduce other expenses, such as cooking at home, using public transportation, and finding free or low-cost entertainment options.

  • Low Income: If your income is low, consider adjusting the percentages to prioritize essential expenses and savings. For example, you might allocate 60% to needs, 10% to wants, and 30% to savings and investments. Look for ways to increase your income, such as taking on a side job or negotiating a raise, and consider government assistance programs if needed.

  • Significant Debt: If you have significant debt, consider allocating more than 20% to debt repayment. For example, you might allocate 50% to needs, 20% to wants, and 30% to debt repayment and savings. Focus on paying off high-interest debt first, such as credit cards, and consider debt consolidation or refinancing options to lower your interest rates.

  • Unique Financial Goals: If you have unique financial goals, such as starting a business or buying a home, consider adjusting the percentages to accommodate your goals. For example, you might allocate 50% to needs, 20% to wants, and 30% to savings and investments, with a portion of the savings dedicated to your specific goal.

The 50/30/20 rule is a flexible framework that can be adapted to fit your unique financial situation. The key is to prioritize your expenses based on your values and goals and to make adjustments as needed to achieve financial success.

Advanced Budgeting Techniques

While the 50/30/20 rule is a great starting point, there are advanced budgeting techniques that can help you take your financial management to the next level. Here are a few techniques to consider:

  • Zero-Based Budgeting: This technique involves allocating every dollar of your income to a specific category, such as needs, wants, savings, or debt repayment. The goal is to have zero dollars left over at the end of the month. This technique can help you ensure that every dollar is working towards your financial goals.

  • Envelope System: This technique involves using physical envelopes to allocate cash for each budget category. Once the cash in an envelope is gone, you can't spend any more in that category. This technique can help you stay within your budget and avoid overspending.

  • 50/30/20 with Subcategories: This technique involves breaking down the 50/30/20 rule into more specific subcategories. For example, within the needs category, you might have subcategories for housing, groceries, utilities, and transportation. This technique can help you better track your spending and ensure that you're staying within your budget.

  • Percentage-Based Budgeting: This technique involves allocating a specific percentage of your income to each budget category. For example, you might allocate 30% to needs, 20% to wants, 30% to savings, and 20% to debt repayment. This technique can help you ensure that you're prioritizing your financial goals and staying within your budget.

  • Value-Based Budgeting: This technique involves allocating your income based on your values and priorities. For example, if you value travel, you might allocate a larger portion of your income to the wants category for travel expenses. This technique can help you ensure that your spending aligns with your values and priorities.

Technology and Budgeting

Technology can be a powerful tool for managing your budget and achieving your financial goals. Here are a few ways technology can help:

  • Budgeting Apps: There are numerous budgeting apps available that can help you track your spending, set financial goals, and stay within your budget. Some popular budgeting apps include Mint, You Need A Budget (YNAB), and Personal Capital.

  • Automated Savings: Many banks and financial institutions offer automated savings features that allow you to automatically transfer a portion of your income to your savings account. This can help you build your savings without even thinking about it.

  • Investment Platforms: There are numerous investment platforms available that can help you invest your money and grow your wealth. Some popular investment platforms include Robinhood, Acorns, and Betterment.

  • Financial Tracking Tools: There are numerous financial tracking tools available that can help you track your income, expenses, and net worth. Some popular financial tracking tools include Personal Capital, Mint, and Quicken.

Building Wealth with the 50/30/20 Rule

The 50/30/20 rule is not just about managing your current expenses; it's also about building wealth for the future. Here are a few ways the 50/30/20 rule can help you build wealth:

  • Emergency Fund: Building an emergency fund is a crucial step in achieving financial stability. An emergency fund can help you cover unexpected expenses, such as medical bills or car repairs, without going into debt.

  • Retirement Savings: Contributing to retirement accounts, such as a 401(k) or IRA, can help you build wealth for the future. The power of compound interest makes time your best friend when it comes to retirement savings.

  • Investments: Investing in stocks, bonds, mutual funds, or real estate can help you grow your wealth over time. Diversifying your portfolio can help you spread risk and maximize returns.

  • Debt Repayment: Paying off high-interest debt, such as credit cards, can help you save money on interest charges and improve your credit score. This can also free up more money to invest or save.

  • Financial Goals: Setting and achieving financial goals, such as buying a home or starting a business, can help you build wealth and achieve financial success.


The 50/30/20 budgeting rule remains a widely endorsed financial strategy in 2025 for helping individuals gain control over their finances. By allocating your income into needs, wants, and savings, you can achieve a balanced approach to financial management. While the rule provides a solid foundation, flexibility and personal adjustment are essential for maximizing its effectiveness in real-life scenarios.

Whether you are a young professional, a freelancer, a family, a recent graduate, or a retiree, adapting the 50/30/20 rule to your specific needs can pave the way to financial success and long-term stability. By understanding the intricacies of the 50/30/20 rule, exploring real-life examples, and adapting the rule to your unique financial situation, you can master your personal finances and achieve your financial goals.

Remember, financial success is a journey, not a destination. It requires discipline, patience, and a willingness to adapt to changing circumstances. By embracing the 50/30/20 budgeting rule and making it your own, you can take control of your financial future and build a life of abundance and security. So, start today, and take the first step towards mastering your personal finances with the 50/30/20 budgeting rule. Your future self will thank you.

In addition to the 50/30/20 rule, consider incorporating advanced budgeting techniques, leveraging technology, and setting financial goals to build wealth and achieve long-term financial success. With the right mindset, tools, and strategies, you can master your personal finances and build a life of abundance and security. So, start today, and take control of your financial future with the 50/30/20 budgeting rule.

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