How Much Rent Can You Actually Afford?
2 min read · Reviewed 14 August 2026
Working out how much rent you can comfortably afford is about more than the headline figure. This guide covers the rules of thumb, the checks agents run, and the hidden costs to plan for.
The 30% rule as a starting point
A widely used budgeting guideline is to spend no more than about 30% of your gross (before-tax) income on rent. On a £30,000 salary, that works out to roughly £750 a month. It is not a hard law, but it is a sensible ceiling that leaves room for everything else in your budget.
The 30% figure is a guide, not a guarantee of comfort. In expensive cities many people spend more, and in cheaper areas you may spend far less. Treat it as a sanity check rather than a target to hit.
What letting agents actually test
When you apply for a tenancy, agents usually run an affordability reference. A common rule is that your annual income needs to be at least 30 times the monthly rent. So for a £1,000-a-month flat, they would typically want to see an income of around £30,000.
If you fall short of this, you are not necessarily stuck. Options include using a guarantor (often a parent) who agrees to cover the rent if you cannot, paying several months upfront, or applying jointly so two incomes are combined. Knowing the rule in advance helps you target properties you will actually pass referencing on.
Don't forget the bills
Rent is only part of the cost of a home. On top of it you will usually pay council tax, gas and electricity, water, broadband, and often contents insurance. Together these can add hundreds of pounds a month, so a flat that looks affordable on rent alone may not be once bills are included.
Energy is often the most variable of these. Working out the running cost of high-use appliances such as heaters, tumble dryers and electric showers helps you avoid a shock when the first bill arrives. Our energy cost calculator estimates this from an appliance's wattage and your unit price.
Building a realistic monthly budget
The safest approach is to work out your take-home pay first, then subtract your essential bills, and see what is genuinely left for rent and living. This is more accurate than applying a percentage to your gross salary, because it reflects tax, National Insurance and your actual outgoings.
Our rent affordability calculator combines the 30% guideline and the 30-times-income rule, adjusting for any regular debt payments, and recommends the more cautious of the two. Pairing it with the salary calculator gives you a grounded picture of what you can sustainably spend.
This guide is general information, not financial, tax or legal advice. Figures are estimates and can change. Always check GOV.UK or a qualified professional for your own situation.