Work out single income household budget instantly with clear inputs, formula shown and shareable results.
A single-income household has no second earner to absorb shocks, so the housing share and the per-person discretionary budget matter more than in a dual-income home. Keeping housing under a third of income is the key constraint.
Single income budget
Discretionary = income - housing - other fixed; per person = discretionary / members
Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.
It is the largest and least flexible cost. Above a third of a single income, almost nothing else can absorb a shock.
Single-income households should target closer to nine months than the usual three to six.