Monthly Budget Calculator

A budget is just income minus expenses — but seeing it laid out is what makes it useful. Enter your take-home income and monthly spending by category to see what's left over each month, your savings rate, and how your spending maps to the popular 50/30/20 rule. Everything runs in your browser; nothing is stored.

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Needs housing, utilities, essentials

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Wants lifestyle & discretionary

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Savings savings, investments & extra debt payoff

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Enter your monthly income to see your budget.

Take-home income
Needs
Wants
Savings
Total spent
Left over
Your spending vs. the 50/30/20 rule
BucketTargetYou
Needs50%
Wants30%
Savings20%

Enter your take-home (after-tax) income and typical monthly amounts. The 50/30/20 split treats housing, utilities, groceries, transport, insurance and minimum debt payments as needs; dining, shopping and other as wants; and savings, investments and extra debt payoff as the 20%. It's a guideline for comparison, not financial advice.

How to build a monthly budget

A budget answers one question: does the money coming in cover the money going out, with something left to save? Start with your take-home income — what actually lands in your account after tax — then list your regular monthly expenses. The calculator subtracts spending from income to show your surplus or deficit, and reports your savings rate: the share of income you put toward savings and investments. A positive number left over is the goal; a negative one means it's time to trim a category.

The 50/30/20 rule

The 50/30/20 rule is a quick sanity check on where your money goes. It suggests roughly 50% of take-home pay for needs (housing, utilities, groceries, transport, insurance, minimum debt payments), 30% for wants (dining out, shopping, subscriptions), and 20% for savings and extra debt repayment. The calculator groups your entries into those three buckets and shows your actual percentages next to the targets. Treat it as a starting point — in a high-cost city, needs often run well above 50%, which just means wants or savings have to give.

Turning the number into a plan

If you're over budget, the fastest wins are usually the biggest categories — housing and transport — followed by the flexible ones like dining and shopping. If you have a surplus, decide where it goes before it disappears: an emergency fund, extra debt payoff, or investing. To check your take-home figure, use the Paycheck Calculator; to project what consistent saving becomes over time, see the Compound Interest Calculator or the Investment Calculator. Everything here is computed in your browser and nothing is stored.

Frequently Asked Questions

How does a monthly budget calculator work?
Enter your take-home (after-tax) monthly income, then your regular monthly expenses by category. The calculator adds up your spending, subtracts it from your income to show what's left over — a surplus or a deficit — and works out your savings rate. It also groups your categories into needs, wants and savings so you can see how your spending compares to the 50/30/20 rule.
What is the 50/30/20 budget rule?
The 50/30/20 rule is a simple guideline that splits after-tax income into three parts: 50% for needs (housing, utilities, groceries, transport, insurance, minimum debt payments), 30% for wants (dining out, shopping, subscriptions), and 20% for savings and extra debt repayment. It's a starting point, not a law — high-cost-of-living areas often push needs above 50%. The calculator shows your actual percentages next to these targets.
What is a good savings rate?
The 50/30/20 rule suggests saving at least 20% of take-home pay, and that's a solid target for most people. Saving more shortens the time to reach goals like an emergency fund or a house deposit; saving less is common when income is tight or debt is high. This calculator reports your savings rate as the share of income you direct to savings and investments, so you can see where you stand and adjust.
Is my budget data saved or sent anywhere?
No — the Monthly Budget Calculator stores nothing. Everything is calculated in your browser as you type. Nothing you enter is uploaded, stored, or shared.