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Rent affordability guidelines suggest that housing costs should not exceed 30% of gross income (the classic 30% rule). In many UK cities, renters spend significantly more — London renters average over 40% of income on rent. These calculators help identify a sustainable rent level.
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- 130% rule: max monthly rent = (annual take-home / 12) × 0.30
- 2Some landlords require renters to earn 2.5–3× the annual rent
- 3Gross-based rule: keep rent below 33% of gross (pre-tax) income
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What is Rent Affordability?
Rent affordability guidelines suggest that housing costs should not exceed 30% of gross income (the classic 30% rule). In many UK cities, renters spend significantly more — London renters average over 40% of income on rent
How accurate is the Rent Affordability calculator?
The calculator uses the standard published formula for rent affordability. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Rent Affordability calculator use?
This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Rent Affordability calculator use?
The core formula is: 30% rule: max monthly rent = (annual take-home / 12) × 0.30. Each step in the calculation is shown so you can verify the result manually.
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