How busy families can use the 50/30/20 rule

The 50/30/20 rule is one of the simplest budgets to start. You split your take-home pay into three groups and stop there. You don't need forty categories or every receipt.

For a busy family, that's the appeal. This post covers how the rule works, how to sort family spending into the three groups, how to apply it to each paycheck, and what to do when the numbers don't fit.

What the 50/30/20 rule is

Elizabeth Warren and Amelia Warren Tyagi described the rule in their 2005 book All Your Worth. It splits after-tax income three ways:

• 50% to needs
• 30% to wants
• 20% to savings and paying down debt

That's the whole rule. Treat the percentages as a target. You only have to watch three numbers.

Needs, wants and savings for a family

The hard part is deciding which group each cost belongs to. Here's a simple test. A need is something that causes real trouble if you skip it this month. A want is something you'd miss but could skip.

Needs usually include:

• Rent or mortgage
• Utilities, phone and internet
• Groceries
• Insurance
• Childcare so you can work
• Gas or transit to get to work and school
• Minimum payments on debt

Wants usually include:

• Eating out and takeout
• Streaming and subscriptions
• Kids' activities beyond the basics
• Hobbies, clothes beyond what's needed, and trips

Savings and debt include:

• Emergency savings
• Retirement contributions you make yourself
• Sinking funds for holidays and school costs
• Any debt payment above the minimum

Some costs sit on the line. Is soccer a need or a want? Your family decides. Pick once and stay consistent so the numbers mean something.

Apply it to each paycheck

The rule is usually described per month. If you're paid every other Friday or twice a month, split each paycheck instead. That way each paycheck covers its own share and you don't spend the first half of the month on the whole month's wants.

Here's an example for a family taking home $2,400 per biweekly paycheck. Your numbers will be different.

Big bills like rent often don't split evenly across two paychecks. Assign each bill to the paycheck that lands before it's due, then check that the needs total across both paychecks is about half of the two together. Here's how to build a paycheck-by-paycheck budget if you haven't set one up.

Move the 20% the day after payday, with an automatic transfer. If you wait until the end of the pay period, there may be nothing left to move.

When needs are more than 50%

If you have young kids, needs can run over half of take-home pay. Rent and childcare alone can do it. That doesn't mean the rule is useless. It means you adjust.

• Find your real split first. Add up your needs and divide by take-home pay. You might be at 60%.
• Shrink wants before savings. If needs take 60%, try 60/20/20 for now.
• Keep some savings going, even if it drops below 20%. A small amount every paycheck keeps the habit.
• Look at the biggest needs. Housing, childcare, car payments and insurance are where a change moves the number. Ask about childcare assistance at childcare.gov, shop insurance once a year, and call lenders about lower rates.
• Revisit when things change. When childcare ends or a raise comes through, move back toward 50/30/20.

When income changes from paycheck to paycheck

If your paychecks vary because of hours, overtime or commission, apply the percentages to each check as it lands. A bigger check means bigger dollar amounts in all three groups. Just make sure your smallest typical paycheck covers your fixed needs. The extra on bigger checks goes to wants and savings.

Tracking 50/30/20 without a spreadsheet

You only need three running totals per paycheck. Halfway through the pay period, check how much of each group you've used.

The single most useful check is how much of this paycheck is still unspent. You can see what's left of your paycheck with the calculator. Enter your take-home, anything you carried in, and what you've spent so far.

If you'd rather not do it by hand, Budgey is a budget app built around paydays. Set up three category groups for needs, wants and savings, and the budget period runs payday to payday. Auto builds the period from your real money once you connect a bank, and you see what's left of your paycheck as you spend. Core is $5/mo or $20/yr with live sync for 1 bank and shared budgets, so both parents see the same numbers. Plus is $10/mo or $100/yr for 2 or more banks or budgets.

Is 50/30/20 right for your family?

It fits families who want a simple target and don't want to track every category. It's a weaker fit if you want every dollar planned, or if you overspend in one or two categories and need hard limits there.

If that's you, zero-based budgeting or the envelope system may fit better. Here's how the main budgeting methods compare.

FAQ

Is the 50/30/20 rule based on gross or take-home pay?
Take-home pay, the amount that lands in your account after taxes.

Does a minimum debt payment count as a need?
Yes. The minimum is a need. Anything you pay above the minimum goes in the 20% group.

What if my rent alone is half my paycheck?
Then needs will run over 50%. Shrink wants first, keep some savings going, and look for ways to bring the biggest needs down over time.