Budget Calculator
Budget calculator: turn take-home pay into a monthly 50/30/20 plan and compare targets with what you actually spend. Free, no sign-up, and it runs in your browser.
Dedicated page: /en/budget-calculator
After tax, what actually lands in your bank account.
What you actually spend each month
Needs are housing, utilities, groceries, transport, insurance, healthcare and minimum debt payments. Wants are dining, entertainment, subscriptions, personal and other spending. Savings covers retirement, the emergency fund and extra debt payments above the minimum. Estimate only, not financial advice.
Quick answer
A budget calculator turns your take-home pay into a monthly plan. Enter what you earn after tax and what you spend in each category, and it splits the money into needs, wants and savings using the 50/30/20 rule, shows the target next to your real spending, and reports the leftover, your savings rate and the yearly surplus.
About this Budget Calculator
Budget calculator: turn take-home pay into a monthly 50/30/20 plan and compare targets with what you actually spend. It is one of the Money and Finance on ToolUstad, and like every tool here it runs entirely in your browser: nothing you type, paste or open is uploaded to a server, and there is no sign-up or usage limit.
What is a budget calculator?
A budget calculator answers one question: where does the money go. The default target is the 50/30/20 rule, popularised by Senator Elizabeth Warren: 50 percent of take-home pay for needs, 30 percent for wants, 20 percent for savings and extra debt repayment. On $5,000 of take-home pay that is $2,500, $1,500 and $1,000. The rule is a starting point, not a law.
The number that matters most is the leftover: income minus everything you assigned. A positive leftover is money with no job yet, and the best first job for it is the emergency fund, then high-interest debt. A negative leftover means the plan spends more than you earn, and something has to move before the month starts, not after the money runs out.
How the 50/30/20 split works
Needs are the costs you cannot easily cut: rent or mortgage, utilities, groceries, transport to work, health insurance and the minimum payments on any debts. Wants are the spending that improves life but could shrink in a tough month: restaurant meals, streaming, gym memberships, holidays and clothing beyond the basics. Savings covers retirement accounts, the emergency fund, investments and any debt payment above the minimum.
Two ratios tell you how the budget is doing. The savings rate is savings divided by income: $400 on $5,000 is 8 percent, below the 20 percent target. The expense-to-income ratio is total spending divided by income, counting savings as spending: $4,100 on $5,000 is 82 percent, which leaves an 18 percent cushion.
Needs, wants and savings in practice
Most budgets fail in the same two places. Housing takes more than 30 percent of gross income, the traditional lending benchmark, and a long tail of small subscriptions adds up to $100 to $200 a month without anyone noticing. Housing and transport together are usually more than half of a household budget, so a 10 percent cut in one of them beats cancelling every streaming service.
Best practices
- Budget from take-home pay, not gross pay: taxes and payroll deductions never reach your account.
- Pay yourself first: move the savings amount out on payday, before spending starts, instead of saving whatever is left.
Common mistakes to avoid
- Forgetting irregular costs like car registration and annual insurance, then treating the month they land as a surprise.
- Counting a credit card limit as a safety net. Available credit is borrowing at 20 percent or more, not savings.
- Setting a perfect budget and never checking it against real spending. The second month is when the real numbers appear.
Who is the budget calculator for?
Anyone paid monthly who wants to know where the money goes, and savers working toward the 20 percent target.
This calculator is an estimate only, not financial advice. Your spending categories and targets are yours to set, and the figures are only as good as the spending you enter.
Learn: how to use the Budget Calculator
- Enter your monthly take-home pay, the amount that actually lands in your bank account after tax.
- Pick the 50/30/20 rule, a custom split, or zero-based budgeting where every dollar gets a job.
- Enter what you actually spend in each category: housing, utilities, groceries, transport, insurance, healthcare, debt minimums, dining, entertainment, personal and savings.
- Read the target for each bucket next to your real spending, the over or under amount, and the leftover for the month.
- Download the plan and send the leftover to your emergency fund first, then to high-interest debt.
Features
- 50/30/20 targets from any take-home pay, plus custom percents and zero-based mode
- Eleven real spending categories split into needs, wants and savings
- Over or under per bucket, in dollars and as a share of income
- Leftover per month and per year, savings rate and expense-to-income ratio
- Plain-language verdict: what to cut first when the budget is over
- Downloadable monthly plan as a text file, plus copy to clipboard
Worked example
Take-home pay of $5,000 a month: the 50/30/20 targets are $2,500 for needs, $1,500 for wants and $1,000 for savings. Actual spending is $3,100 on needs, $600 on wants and $400 on savings, $4,100 in all. Needs run $600 over target, wants run $900 under, savings run $600 under. Leftover is $900 a month, $10,800 a year, and the savings rate is 8%. Moving $600 of the leftover into savings hits the 20% target exactly.
Frequently asked questions
Should I budget from gross pay or take-home pay?
Take-home pay. Gross pay includes money that never reaches your account, so budgeting from it overstates what you can spend by roughly 20 to 30 percent. Enter the net amount from your pay stub.
What counts as a need and what counts as a want?
A need is housing, utilities, groceries, transport to work, insurance, healthcare and minimum debt payments. A want is dining out, entertainment, subscriptions, personal spending and anything you could cut in a tough month. When in doubt, call it a want.
What is a good savings rate?
Financial planners commonly recommend 15 to 20 percent of take-home pay, with about 10 percent toward retirement and the rest toward an emergency fund and other goals. If 20 percent is out of reach, start where you can and raise it 1 percent with every pay rise.
My needs are over 50 percent of my income. Is that a problem?
Not necessarily. The 50/30/20 split was designed for average US households, and housing alone can take 40 percent in expensive cities. Keep your savings rate above 10 to 15 percent and focus on the two biggest levers, housing and transport.
What is zero-based budgeting?
Giving every dollar a job before the month starts, so income minus assignments equals zero. It is the same arithmetic as 50/30/20, but you assign the leftover to savings or debt instead of leaving it unplanned.
How is the expense-to-income ratio different from the savings rate?
The expense-to-income ratio is total spending divided by income, including savings as spending. The savings rate is only the savings part divided by income. The ratio measures how tight the budget is; the savings rate measures how fast wealth grows.
How often should I redo my budget?
Monthly, for the first three months, then quarterly or whenever income or rent changes. A budget built on guessed spending is wrong in the first month; the second month is when the real numbers show up.
Related tools
More Money and Finance like this one, plus two picks from other categories. Each opens its own dedicated page.