Budget Calculator
Adjust the inputs below. Results update as you type.
How it works
Enter take-home income and itemize expenses by category (housing, food, transport, utilities, subscriptions, debt, savings). The 50/30/20 rule allocates 50% to needs, 30% to wants, 20% to savings and debt repayment. Tracking actual spending for 1–3 months before budgeting gives more realistic category estimates than guessing.
Input guidance
- Use realistic rates from lender or provider quotes instead of headline averages.
- Model conservative, baseline, and optimistic scenarios before deciding.
- Include recurring real-world costs (fees, taxes, insurance, maintenance) where relevant.
The formula
A common framework is 50/30/20: 50% of after-tax income to needs, 30% to wants, 20% to savings and debt payoff. Adjust the splits to your goals.
Worked example
On $4,000 take-home pay, 50/30/20 allocates $2,000 to needs, $1,200 to wants, and $800 to savings and extra debt payments.
More examples to test
- Conservative case: use a higher interest rate and lower growth assumptions to stress-test affordability.
- Optimistic case: use a lower rate with stable income assumptions to compare upside potential.
How to interpret results
Treat this as a planning model, not a final approval tool. Compare at least two scenarios and focus on total-cost and cash-flow trade-offs.
When this can be inaccurate
Results can diverge due to fees, changing rates, tax rules, lender policies, and behavior changes that simplified models cannot fully capture.
Change history
- July 2026: Quality-reviewed for publication with formula checks and explanatory copy updates.
Site-wide corrections also appear on the corrections log.
Track your spending automatically
Budgeting app with bank sync.
Frequently asked questions
What is the 50/30/20 rule?+
A simple budget split: half your take-home pay for needs, 30% for wants, and 20% for saving and paying off debt.
Should I budget gross or net income?+
Use net (take-home) income, since that is what you actually have to allocate after taxes and payroll deductions.
What if my needs exceed 50%?+
Common in high-cost areas. Trim wants, boost income, or accept a lower savings rate temporarily, but keep some savings going.
How should I use this result?+
Treat it as a planning estimate. Compare at least two realistic scenarios, then confirm with statements, quotes, or a qualified professional before acting.
How often should I refresh assumptions?+
Refresh whenever rates, income, costs, or policy limits change materially, and before making irreversible commitments.