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bythenumbers

Renting

Rent affordability calculator

How heavy the rent is against your income, and what is left.

  • What it means

    This checks how heavy a proposed rent is against your income, and what is left after rent and other monthly outgoings.

  • Why it matters

    Rent that looks fine in isolation can leave too little for food, travel and savings once everything else is paid.

  • When to use it

    Use it before you apply for a tenancy, or when comparing two rents in different areas.

  • How to read the result

    A common guide is keeping rent near or under about 30% of income, but your leftover cash matters more than any single rule.

Your figures

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Methodology

Rules checked against published sources as of 2025-04-01.

  • Rent to income is proposed rent divided by gross monthly income.
  • Remaining income deducts rent, other commitments and debt payments.

Pair the numbers with area intelligence for a postcode.

FAQs

Is 30% of income a hard limit?

No. It is a common rule of thumb. Landlords and referencing agencies use their own criteria.