Breakdown
How it works
Needs are costs you cannot easily avoid — housing, utilities, groceries, transport to work, insurance, minimum debt payments. Wants are everything discretionary. The 20% goes to savings, investments and debt overpayments. The point is not the exact ratio but protecting the savings share before lifestyle spending expands to fill the gap.
Formula
Worked example
Take-home 4,000: needs 2,000, wants 1,200, savings 800. Spending 2,200 on needs and 1,200 on wants leaves 600 (15%) — needs are 200 over.
Frequently asked questions
What if my rent alone is 40% of income?
Common in London and Dubai. Squeeze wants to 20% to keep savings at 20%, or accept 60/20/20 temporarily while you work on income or housing cost.
Should the 20% go to savings or debt?
High-interest debt first (cards, overdrafts), then a one-month emergency buffer, then the full emergency fund and investing. Mortgage overpayment and low-rate loans come last.
Is 20% enough for retirement?
For a standard retirement starting in your 20s, yes if it includes employer pension contributions. Starting at 40, or aiming to retire early, needs 30%+.