The 50/30/20 rule with your pay in guaraníes: tables for ₲3, ₲5 and ₲8 million

The 50/30/20 rule splits your net pay into three pockets: 50% for needs, 30% for wants and 20% for saving or paying debt. If you earn ₲5,000,000, that's ₲2,500,000, ₲1,500,000 and ₲1,000,000.

It was popularized by Elizabeth Warren and Amelia Warren Tyagi in the book All Your Worth (2005). It's a guide, not a law: it helps you get organized and quickly see where your money goes.

How it works: the three pockets

The question for classifying an expense is: what happens if I don't pay it? If you don't pay the rent, you lose your home: it's a need. If you don't pay a streaming subscription, nothing happens: it's a want.

Table for different pay levels

Use your net pay: what really reaches your account after deductions.

What if 50% isn't enough for your needs?

It's very common, especially when rent or a debt weighs heavily. In that case adjust the rule instead of abandoning it:

Steps to adjust:

1. Write down your expenses from last month (your card statement and account activity help).
2. Sort them into needs, wants and savings.
3. If needs go over 50%, look for the heaviest expense: housing, debt or transport.
4. Cut wants first, not savings. Keep at least 10% for savings even if you have to lower wants to 20%.
5. Also think about raising your income: sometimes it's easier than cutting.

How much should go to housing?

A widely used international reference is that housing (rent or mortgage payment, not counting utilities) shouldn't exceed 30% of net pay. Within the 50/30/20 rule, that's more than half of the needs pocket.

It's a reference, not a rule: in some areas rent costs more. If you go over 30%, the rest of your needs (food, transport, utilities) have to adjust so the total doesn't exceed your budget.

What to do with the 20% for savings and debt

A reasonable order:

1. Emergency fund: the equivalent of 3 months of necessary expenses. With a ₲5,000,000 pay, your needs are ₲2,500,000 and the fund is ₲7,500,000. At ₲1,000,000 a month, you build it in 7.5 months.
2. Expensive debt: the maximum interest on credit cards in guaraníes is 19.62% in October 2026. Paying off a debt at 20% is like earning 20% risk-free, something you'll hardly get by investing.
3. Goals: a trip, a down payment on a home, a course.
4. Investing: when you already have the fund and no expensive debt.

Month-by-month example with a ₲5,000,000 pay

A hypothetical example of what the budget looks like:

Your first budget in 20 minutes

1. Open your activity from last month: your card statement, your bank app and the cash payments you remember.
2. Write down each expense in a spreadsheet or notebook, with its amount.
3. Mark them with N, W or S (need, want, or savings and debt), using the question "what happens if I don't pay it?".
4. Add up each group and divide it by your net pay to see the real percentage.
5. Pick just one thing to change this month. Changing everything at once almost never works.

Five common mistakes with the 50/30/20 rule

1. Calculating on gross pay. It gives you larger amounts than you really have.
2. Putting a want in the needs pocket. A phone plan with 100 GB is communication; the 20 GB one is enough.
3. Saving "whatever is left". Almost nothing is ever left: you pay savings first.
4. Forgetting expenses that come once a year: insurance, tuition, taxes and school supplies. Divide them by 12 and add them to each month's needs.
5. Giving up after a bad month. One month when you overspent doesn't ruin the system; go back to the rule the next month.

If you get a raise

A practical idea: put half of the raise toward savings and debt until you reach 20%, and split the rest between needs and wants. That way your life improves without your spending rising at the same pace as your income.

How to do it without fighting your budget

• Pay yourself first: transfer your savings the same day you get paid, before spending. Saving what's left at the end of the month almost never works.
• Separate your accounts: one for the month's spending and another for savings. What you don't see, you spend less.
• Divide wants into 4 weeks: if your wants pocket is ₲1,500,000, that's ₲375,000 a week.
• Review once a month: see which category went over and adjust next month's.

Income that changes every month

If you're paid on commission or work for yourself, calculate with the average of the last 6 months (or with the lowest month if you want to play it safe). In good months, the surplus goes first to the emergency fund.

Build your 50/30/20 in 30 seconds

Enter your net pay in the calculator and try different variants. It shows you how much each pocket is, how much the 30% for housing is, and in how many months you build your emergency fund.