The 50/30/20 Rule
Most budgets fail because they're too detailed to maintain. The 50/30/20 rule survives because it asks you to track only three numbers. Half of your take-home pay covers needs — the non-negotiables like rent or mortgage, groceries, transport, utilities, insurance, and minimum debt payments. Thirty percent covers wants: eating out, subscriptions, entertainment, upgrades. The final twenty percent is the part that builds your future: savings, investments, and extra debt repayment above minimums.
The rule isn't exact — in high-rent areas like London, needs may take 60% or more of your income, leaving less for wants and savings. But the proportions give you a target to aim for and a framework for making trade-offs. If your needs are taking 70% of your income, you know you need to either increase income or decrease housing costs — there's no amount of coffee-cutting that will fix a structural problem.
How to Use This Calculator
Enter your monthly take-home pay (after tax and deductions). The calculator shows the 50/30/20 target amounts. If you want, enter what you actually spend in each category to see whether you're over or under the guideline. The summary tells you whether your budget is balanced, needs-tight, or needs-restructuring.
When the Rule Doesn't Work
The 50/30/20 rule assumes a middle-income household with moderate housing costs. If you're on a low income, needs may take 80%+ of your pay, leaving nothing for savings. If you're on a very high income, 20% for savings may be far too little — you should be saving 40%+. The rule is a starting point, not a commandment. Adjust the percentages to fit your situation, but keep the principle: needs first, then wants, then savings.
Related Tools
- Debt Snowball — put your 20% to work clearing debt.
- ISA Calculator — grow your savings tax-free.
- Pension Calculator — plan for retirement.
Disclaimer: Finance Atlas is not regulated by the FCA. Estimates only, not financial advice. Always consult a qualified, FCA-regulated adviser.