Budget Calculator

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Plan your monthly budget with the 50/30/20 rule. See exactly where your money goes and how much you should be saving.

Quick answer: The 50/30/20 rule splits take-home pay into three buckets: needs, wants, and savings or debt payoff. On $5,400 in monthly after-tax income, that means $2,700 for needs, $1,620 for wants, and $1,080 for savings and extra debt payments. Elizabeth Warren and Amelia Warren Tyagi set out the split in their 2005 book All Your Worth.

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Required. Add back retirement contributions or health premiums taken out of your pay if you list them below.
Only income is required to see a result. A blank line counts as 0.

NEEDS (50%)

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Optional. Credit cards, student loans, and personal loans. Keep a mortgage under Housing and a car payment under Transport.
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WANTS (30%)

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SAVINGS (20%)

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Monthly Budget Summary

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Needs $0
Wants $0
Savings $0

📐 Formula

Target = take-home income × split percentage. On the standard split: needs ≤ 50%, wants ≤ 30%, savings and extra debt repayment ≥ 20%. Surplus = income − (needs + wants + savings).

How to Use the Budget Calculator

1

Pick your currency and enter your take-home income

Choose US dollars, British pounds, Australian dollars, or Canadian dollars, then enter your monthly income after tax. If your employer takes retirement contributions or health premiums out of your pay, add them back to the income figure, because you will list them as line items below.

2

Choose a budget split

Start with 50/30/20. If rent or childcare pushes your needs past half your income, switch to 60/20/20 or 60/30/10. Every target updates to match.

3

Enter your monthly spending

Fill in your needs (housing, utilities, groceries, transport, insurance, childcare), your wants (dining out, entertainment, shopping, subscriptions), and your savings and extra debt repayment. Minimum debt payments count as needs, so they have their own line in the needs column. The Extra Debt Repayment line is for anything you pay above the minimum. Use real figures from last month's bank statement.

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Read the verdict on each category

Each category shows its share of your income, the target for your chosen split, and how far over or under that target you are. Needs and wants should sit at or under target. Savings should sit at or above it.

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Check the surplus or deficit

The headline figure is your income minus everything you entered, shown per month and per year. A deficit needs fixing now. A surplus is money you have not yet assigned to savings or debt.

The 50/30/20 Rule Explained

The 50/30/20 framework divides after-tax income into three categories. 50% for needs: rent/mortgage, utilities, groceries, transport, insurance, minimum debt payments. 30% for wants: dining, streaming, gym memberships, vacations. 20% for savings and debt repayment: emergency fund, retirement accounts, extra debt payments. Elizabeth Warren and Amelia Warren Tyagi set it out in their 2005 book All Your Worth. Treat the percentages as guidelines. In a high-cost-of-living city, needs can run well past 50%, which is what the 60% splits in the calculator are for, and a high earner can often save more than 20%.

Take-Home Pay, Not Salary: Which Income Number to Use

Every target on this page is a percentage of take-home pay, not your salary. If you only know your gross salary, run it through the Paycheck Calculator first and bring the net figure back here. One adjustment matters: if your employer deducts retirement contributions or health premiums before paying you, add them back to income and list them as line items. Otherwise, money you are already saving never shows up in your savings percentage.

Here is what the standard 50/30/20 split works out to at common take-home levels.

Monthly take-homeNeeds (50%)Wants (30%)Savings (20%)
$3,000$1,500$900$600
$4,000$2,000$1,200$800
$5,000$2,500$1,500$1,000
$6,000$3,000$1,800$1,200
$8,000$4,000$2,400$1,600
$10,000$5,000$3,000$2,000

Building an Emergency Fund First

Before aggressively investing, build 3–6 months of essential expenses in a high-yield savings account (currently paying roughly 3.5–4.5% APY). This prevents job loss, medical bills, or car repairs from creating a debt spiral. Until this foundation is in place, the 20% savings allocation should flow primarily into the emergency fund rather than investments. The Savings Calculator shows how many months it will take to fill the fund at your current contribution. Once the emergency fund is full, redirect that money to retirement accounts, then to other investment accounts. If you carry card debt, the Credit Card Payoff Calculator shows what each extra dollar in the Extra Debt Repayment line saves you in interest.

Common Budget Leaks: Where Money Disappears

Subscriptions are the leak people misjudge most. When C+R Research surveyed 1,000 US consumers in 2022, respondents guessed they spent $86 a month on subscriptions. Once they itemized their spending category by category, the real average was $219, and 42% admitted they were still paying for something they had stopped using. Review every recurring charge once a month and cancel anything you have not used in the past 30 days.

Food away from home is the other big leak. The Bureau of Labor Statistics' 2024 Consumer Expenditure Survey puts the average household's spending on meals bought away from home (restaurants, takeout, delivery, cafeterias) at $3,945 a year, about $329 a month, on top of $6,224 a year on groceries. Count that $329 as a want. Only the grocery bill is a need.

How to Build a 50/30/20 Budget by Hand: Worked Example

Take a household with $5,400 of monthly after-tax income. The rule allocates by simple multiplication:

  • Needs (50%): $5,400 × 0.50 = $2,700 for rent or mortgage, utilities, groceries, insurance, minimum debt payments, and transportation to work.
  • Wants (30%): $5,400 × 0.30 = $1,620 for dining out, streaming, travel, hobbies, and upgrades beyond the basic version of a need.
  • Savings & extra debt payoff (20%): $5,400 × 0.20 = $1,080 toward the emergency fund, retirement accounts, and payments above the minimums.

The hardest part is classification, not arithmetic. The honest test for any expense: what would happen if it stopped this month? If the answer is eviction, hunger, or default, it is a need. A $700 car payment on a vehicle chosen for status is part need (basic transport) and part want (the upgrade); splitting it keeps the categories truthful.

What if needs already exceed 50% of income?

This is common in high-rent cities, and it does not mean budgeting has failed. Switch the calculator to the 60/20/20 split ($3,240 needs, $1,080 wants, $1,080 savings on the same income) and protect the savings slice rather than the wants slice. If rent alone is the problem, the Rent Calculator shows what your income supports. The 60/30/10 split ($3,240 needs, $1,620 wants, $540 savings) is a stopgap for a tight year. Whichever split you use, the job of the percentages is to stop lifestyle spending from absorbing every raise.

Making a Budget Stick: Methods, Irregular Income, and Reviews

Is zero-based budgeting better than 50/30/20?

They solve different problems. Zero-based budgeting, the method Dave Ramsey teaches, assigns every dollar a job before the month begins (income minus all allocations equals exactly zero) and suits people whose money escapes through small, untracked leaks. The 50/30/20 rule is a lighter-touch guardrail for people who will not maintain 40 category envelopes. Many households run 50/30/20 at the top level and zero-base only the wants category, where most leaks are.

How do you budget with percentages on an irregular income?

Freelancers and commission earners budget off a baseline income: the lowest realistic monthly income of the past year. Fixed percentages apply to the baseline; anything earned above it is split by a preset rule (for example, 50% to savings, 30% set aside for tax not yet withheld, and 20% to free spending). You decide once how a good month gets divided, instead of re-planning every time income moves.

How often should you re-run the numbers?

Recalculate whenever take-home pay changes and audit actual spending against the targets quarterly. Stale numbers sink more budgets than bad math does. A rent increase or a higher insurance premium reshapes the 50% category while the plan still reflects last year.

Using This Calculator in the US, UK, Australia, and Canada

The 50/30/20 percentages work the same in US dollars, British pounds, Australian dollars, and Canadian dollars, so the currency selector changes only the symbol shown, not the math. The Retirement Savings line needs a local reading. In the UK, workplace pension contributions usually come out of your pay before it reaches you, so add them back to income if you list them under Retirement Savings. In Australia, your employer pays compulsory super on top of your wages, so list only voluntary extra contributions. In Canada, add back workplace pension and group RRSP contributions that are deducted from your pay and list them under Retirement Savings. An RRSP contribution you make yourself from your bank account is already inside your take-home pay, so just list it. The emergency-fund interest rates and the rent and spending statistics quoted on this page are US figures.

Budgeting for a Specific Project or Cost

A category-level percentage only starts the job. Before you commit a wants or savings slice to something concrete, get the actual number. For a renovation, the Paint Coverage Calculator and Tile Calculator turn room dimensions into a materials cost. The Kitchen Renovation Cost Calculator estimates a full project budget range by square footage and scope, and the Bathroom Renovation Cost Calculator does the same by bathroom type. If a new pet is part of the plan, the Pet Food Calculator estimates the monthly feeding cost from weight and activity level. Add that figure to the Childcare/Other Needs line now rather than discovering it after the fact.

⚠️ Disclaimer Estimates are for informational purposes only and do not constitute financial advice; actual budgeting needs depend on your location, family size, and financial obligations.

Frequently Asked Questions

Allocate 50% of take-home pay to needs (housing, groceries, transport, utilities), 30% to wants (dining, entertainment, hobbies), and 20% to savings and extra debt repayment. Elizabeth Warren and her daughter Amelia Warren Tyagi popularized it in their 2005 book All Your Worth.
Needs are essentials you cannot live without: rent/mortgage, basic groceries, utilities, minimum debt payments, and essential transport. Wants are nice-to-haves: streaming services, gym memberships, restaurants, and non-essential shopping.
Use take-home pay, the amount left after income tax. If your employer also deducts retirement contributions or health insurance premiums before paying you, add those back to the income figure and then list them as expenses: the retirement contribution under savings and the premium under needs. Skipping this step makes your savings rate look lower than it really is.
Change the split before you give up on the budget. A 60/20/20 split raises the needs target to 60%, cuts wants to 20%, and keeps savings at 20%. If you cannot get wants down to 20% yet, 60/30/10 keeps wants at 30% and drops savings to 10%. Treat that one as a stopgap while you cut a fixed cost or raise your income. The calculator has all three splits built in.
Start with whatever you can. Even 5% is better than 0%. Automate savings so they happen before you spend. As income grows or debts are paid off, gradually increase your savings rate.
The traditional rule is 30% of gross income, and many renters cannot meet it. The Census Bureau's 2023 American Community Survey found that 49.7% of US renter households, more than 21 million, spent over 30% of their income on housing costs. A stricter personal target is to keep total housing costs (rent, renters insurance, and utilities) under 30% of take-home pay rather than gross income.
Build 3 to 6 months of essential expenses in a high-yield savings account, currently paying roughly 3.5–4.5% APY, before directing extra cash toward investments. This fund covers job loss, medical bills, or a major repair without forcing you into debt. Until it is fully funded, most of your 20% savings allocation should go here rather than into a brokerage account or extra retirement contributions. Once the emergency fund is complete, redirect that money into retirement accounts first, then taxable investments.

Sources & Methodology

The calculator multiplies your take-home income by the split you choose and compares each target with the totals you enter. The 50/30/20 split comes from Elizabeth Warren and Amelia Warren Tyagi, All Your Worth (2005). Statistics and guidance on this page come from: