The simplest budgeting rule that actually survives at every income level.
Type your take-home pay. The rule allocates 50% to needs, 30% to wants, 20% to savings + extra debt repayment. Edit the targets if your situation requires (lower-income households often need >50% on needs).
Built and reviewed by Stephen Omukoko Okoth
Mathematical Economist · ex-Morgan Stanley FI · Equilar
Inputs
Your income & targets
Actuals
Your current monthly spend
Verdict
Below savings target.
Saving 18% vs target 20%.
The 50/30/20 rule is a guideline, not a law. In high-income contexts, savings can hit 30-50%. In low-income contexts, needs often exceed 50% structurally. Use the rule as a target you grow into.
Target vs actual
On $ 4,000 take-home
Needs target (50%)
$ 2.0K
Needs actual
$ 2.2K
55%
Wants target (30%)
$ 1.2K
Wants actual
$ 1.1K
28%
Savings target (20%)
$ 800
Savings actual
$ 700
18%
Visual
Target vs your actual split
Target
Actual
Common questions
What is the 50/30/20 rule?
Senator Elizabeth Warren popularised it in All Your Worth (2005). After-tax income splits: 50% needs (rent, utilities, basic food, transport, insurance, debt minimums), 30% wants (dining out, entertainment, hobbies), 20% savings + extra debt repayment. The numbers are guidelines, not commandments — but they're surprisingly robust across income levels.
Does the rule work in low-income contexts?
Imperfectly. In Kenya, on a take-home of KSh 30,000, 50% for needs barely covers a tiny rental + transport. Below ~KSh 60,000, needs often exceed 50% by structural necessity. The rule is most useful as a target you grow into as income rises, not a constraint at every income level.
Should I include taxes in 'income'?
No — start from take-home (after-tax) pay. Use the Take-Home Pay calculator first if you only know your gross. The 50/30/20 rule applies to what hits your account.
How does this connect to other tools?
Pair it with: (1) Take-Home Pay to compute the after-tax income, (2) Emergency Fund to size the 20% bucket's first 3-6 months, (3) Debt Payoff to allocate the 'extra debt repayment' portion of the 20%, (4) Savings Goal once you know how much you can actually contribute monthly.