Budget Calculator
A budget calculator splits your take-home pay across needs, wants, and savings so every dollar has a plan. The calculator above uses the popular 50/30/20 rule — 50% of income to needs, 30% to wants, and 20% to savings and debt payoff — and includes a zero-based mode for budgeting every dollar to zero.
Enter your monthly income and spending to see your targets, where you're over, and how much is left to assign. For example, on $5,000 a month after tax, the 50/30/20 rule sets aside $2,500 for needs, $1,500 for wants, and $1,000 for savings.
Budget calculators
How it works
A budget works by comparing what you earn to what you plan to spend, then steering the gap toward your goals. The calculator above groups spending into three buckets. Needs are costs you can't skip — housing, utilities, groceries, transportation, insurance, and the minimum payments on your debts. Wants are lifestyle choices like dining out, subscriptions, travel, and — often overlooked — an annual-fee credit card whose perks you don't actually use. Savings covers your emergency fund, retirement and investing, and any extra debt payoff above the minimum.
The 50/30/20 rule, popularized by Senator Elizabeth Warren in her book All Your Worth, recommends 50% of after-tax income for needs, 30% for wants, and 20% for savings and debt. These are guidelines, not laws — in high-cost areas, needs often run higher, which simply means a smaller wants bucket. The zero-based method, used by Dave Ramsey's EveryDollar and others, takes a different angle: income minus expenses should equal zero, so every dollar is assigned a job before the month begins. Use the toggle above to switch between the two. To turn your leftover into wealth, see how to grow your savings and track your net worth.
How to make a budget in 5 steps. First, tally your monthly take-home pay — the amount that actually hits your bank account after taxes and payroll deductions. Second, list every expense, splitting fixed costs (rent, insurance, loan payments) from variable ones (groceries, gas, dining). Third, pick a framework: the 50/30/20 rule if you want a quick guardrail, zero-based if you want tight control, or a household budget approach if two incomes fund one plan. Fourth, allocate leftover income to savings and debt payoff before wants — the CFPB's Money Smart guide calls this "paying yourself first." Fifth, review once a month and adjust; a budget only works if it survives contact with real spending.
How to create a family budget adds three layers. Child care and education are often the second-largest line after housing — the BLS Consumer Expenditure Survey shows families with children spend 5–15% of income here, so treat it as a need, not a want. Joint accounts simplify the math but require a monthly money check-in so no one is surprised. Build a "kid inflation" buffer for growth spurts, school fees, and activities that arrive in lumpy bursts. The monthly budget calculator handles single-earner households; the household budget calculator is built for two incomes and shared bills.
A looser cousin of 50/30/20 worth knowing is the 70/20/10 rule: 70% of income for everyday living expenses, 20% for savings, and 10% for debt payoff or giving. The appeal is simplicity — only three numbers instead of the finer needs/wants split 50/30/20 requires. The trade-off is real: lumping needs and wants into one 70% bucket makes it harder to spot which part of that spending is optional, so a household that could easily cut wants to escape high-interest debt may not notice the room to do it. 70/20/10 tends to fit best for disciplined savers with modest fixed costs and little or no high-interest debt; it fits worst for anyone carrying credit card balances, since the plan has no built-in signal to prioritize debt payoff the way 50/30/20's separate wants bucket does. If your fixed costs are unusually low relative to income, run both frameworks through the calculator above and see which produces a savings target you'll actually hit.
Frequently asked questions
What is a budget calculator?
A budget calculator totals your take-home income and planned spending to show whether you have a surplus or a shortfall, and how your spending compares to recommended targets. The calculator above splits your money into needs, wants, and savings using the 50/30/20 rule, or lets you budget every dollar to zero.
What is the 50/30/20 budget rule?
The 50/30/20 rule allocates 50% of your after-tax income to needs, 30% to wants, and 20% to savings and debt payoff. It comes from Senator Elizabeth Warren's book All Your Worth and is the most widely used quick-start budgeting framework because it needs just one number — your monthly take-home pay.
What is the 70/20/10 budget rule and how does it compare to 50/30/20?
The 70/20/10 rule allocates 70% of income to everyday living expenses, 20% to savings, and 10% to debt payoff or giving — one broad spending bucket instead of 50/30/20's separate needs and wants categories. It's simpler to set up, but because needs and wants are combined, it's harder to tell how much of that 70% is actually optional, which can hide room to cut spending and pay down debt faster.
Is the 70/20/10 budget a good idea if I have credit card debt?
Usually not as a starting point. Because 70/20/10 lumps needs and wants together and only sets aside 10% for debt, it doesn't force the same scrutiny of discretionary spending that 50/30/20's separate wants bucket does — and high-interest debt can grow faster than a flat 10% allocation pays it down. The 50/30/20 rule or a zero-based budget generally works better once you're actively paying off debt; see what credit score you'd need for a 0% APR balance transfer card as a faster way to attack the balance.
Should I use gross or take-home income for a budget?
Use take-home (after-tax) income — the amount that actually lands in your account. The 50/30/20 rule is built on after-tax pay. If you save for retirement through payroll deductions, you can add that back in and count it inside your 20% savings bucket.
What is zero-based budgeting?
Zero-based budgeting assigns every dollar of income a specific job until income minus expenses equals zero. It doesn't mean spending everything — money sent to savings or debt counts as a job. This is the method behind Dave Ramsey's EveryDollar app, and you can switch to it with the toggle in the calculator above.
Do minimum debt payments count as a need or savings?
Minimum required debt payments are needs — they're non-negotiable, so they belong in the 50% bucket. Any extra you pay above the minimum to get out of debt faster counts in the 20% savings and debt-payoff bucket. Keeping the two separate is the most common 50/30/20 mistake. If credit card debt is the target, see what credit score a 0% APR card typically needs before assuming a balance transfer is an option.
How much of my income should I save?
The 50/30/20 rule targets 20% of take-home pay for savings and debt payoff combined. If you have high-interest debt, focus that 20% on eliminating it first, then redirect it to an emergency fund and investing. See the savings goal calculator to plan a target.