Researched and sourced from official UK data. Educational, not advice.
A common UK rule of thumb is to keep rent to around 30% of your income before tax. Letting agents often allow up to 40%, and some guides use 35 to 45% of your take-home pay instead. On a £30,000 salary that works out to roughly £750 to £1,000 a month. The honest test of how much rent you can afford is not the maximum a rule allows, but what is left afterwards for bills, food and saving.
There is no single agreed figure, which is why calculators give you different answers. The gap comes down to one thing: whether the rule is measured against your pay before tax or the money that actually reaches your account.
This guide sets out the main rules, shows what each one means by salary, and works through what is left once rent and everyday bills are paid.
How much rent can you afford?
The quick answer is a range, not a single number. Most UK guidance lands between 30% of your gross (pre-tax) income at the cautious end and 40% at the top end, with a take-home version of 35 to 45% of your net pay giving a similar result. Where you sit in that range depends on your other costs: someone with a car loan and childcare can afford less rent than someone without, on the same salary.
About these figures: they are national rules of thumb and illustrative examples on 2026/27 income tax and National Insurance, not a quote, a recommendation, or an assessment of what you personally can borrow or afford. Your own number depends on your full outgoings.
What is the rent affordability rule?
The rent affordability rule is a guide for how much of your income to spend on rent. The most common version suggests no more than 30% of your gross, pre-tax income. Letting agents often apply a stricter check: your annual income should be at least 30 times the monthly rent, which works out to about 40% of gross income.
The rent affordability rules, side by side
The reason calculators disagree is that they use different rules and different definitions of income. Here are the four you will meet most often.
| Rule | What it says | Measured against | Who uses it |
|---|---|---|---|
| The 30% rule | Keep rent at or below 30% of your income | Gross (pre-tax) income | MoneyHelper and general guidance |
| The 40% rule | Rent up to 40%; your yearly income should be at least 30 times the monthly rent | Gross (pre-tax) income | Letting agents' referencing checks; Rightmove |
| The take-home rule | Keep rent to about 35 to 45% of what actually reaches your account | Net (after-tax) income | Some bank and budgeting guides |
| The high-cost-area reality | In expensive cities, many people spend closer to half their income | Either | Real-world tenant experience |
The most useful of these is the take-home version. The 30% and 40% rules are measured against gross pay, which is the number a letting agent references but not the money you live on. Rent of 40% of gross can quietly be closer to 50% of what you actually take home once tax and National Insurance come out. That is why it helps to check any rule against your net pay.
What is the difference between gross and take-home pay?
Gross pay is your salary before tax and National Insurance. Take-home (net) pay is what lands in your account after both are deducted. On 2026/27 rates, a £30,000 salary is about £2,090 a month take-home, not the £2,500 a month the gross figure implies. Rules based on gross income therefore allow a higher rent than the same percentage of take-home would, which is worth remembering when a calculator quotes a maximum.
How much rent can you afford on your salary?
The table below runs the rules across common salaries. The take-home figures use 2026/27 income tax and National Insurance. Read the columns as a range, not a target: the 30% column is the cautious end, the 40% column is roughly the most a letting agent would approve.
| Annual salary | Take-home a month | Rent at 30% of gross | Rent at 40% of gross | Rent at 35 to 45% of take-home |
|---|---|---|---|---|
| £25,000 | ~£1,790 | £625 | £830 | £630 to £810 |
| £30,000 | ~£2,090 | £750 | £1,000 | £730 to £940 |
| £40,000 | ~£2,690 | £1,000 | £1,335 | £940 to £1,210 |
| £50,000 | ~£3,290 | £1,250 | £1,665 | £1,150 to £1,480 |
For context, the average UK private rent is £1,381 a month (ONS, May 2026), from around £834 in Wales to £1,438 in England. That is an average across all sizes: by number of bedrooms, average UK rents run from about £1,121 for a one-bed to £2,055 for four or more bedrooms, and by type from around £1,350 for a flat to £1,571 for a detached home. Many renting households also cover the rent from more than one income, so the share of pay it takes varies widely. Where rents are high relative to local wages, especially London and the South East, renters commonly spend a larger share of their income than the 30% rule of thumb suggests.
What is left after rent? The honest test
A maximum rent figure only tells you half the story. The question that matters is what is left once rent and the bills you cannot avoid are paid. Rent is the biggest single cost, but the other household bills (council tax, energy, water, broadband, a mobile and insurance) add up to roughly £300 to £470 a month on top, depending on the size of your home, before any food or travel.
Here is where the money goes for a single renter on £30,000, taking rent at the cautious 30%-of-gross level.
- Rent£750
- Bills, food and transport£720
- What is left for saving and the rest£620
At 30% of gross, rent takes about a third of take-home and leaves real room for saving. Push it to the 40% ceiling and the same household has far less slack, and an unexpected bill has to come from somewhere. That trade-off, not the maximum a rule allows, is the thing to weigh up.
This is where seeing your real numbers helps more than any percentage. keel is built household-first: it shows what is actually left after rent and bills for your own household, so you can see what you can really afford, not just what an agent will approve.
How do letting agents work out affordability?
Most UK letting agents and their referencing providers use the income 30 times the rent rule: to rent a home at £1,000 a month, you usually need to show an annual income of at least £30,000. If your income falls short, agents commonly ask for a guarantor, usually someone earning around 30 times the annual rent. The deposit itself is capped by law at five weeks' rent, or six weeks' if the annual rent is £50,000 or more. This referencing check is about approving the tenancy, not about what leaves you comfortable, so passing it is not the same as the rent being affordable for you.
What if rent takes more than 40% of your income?
For many renters, especially in London and other high-cost cities, rent above 40% of income is simply the reality of the local market rather than a mistake. If that is your situation, the practical response is to keep the rest of the budget tight: know your essential bills, keep an emergency fund for surprises, and protect any saving you can, even a small amount. This is common and not a reason to panic. It does mean the margin for error is thinner, which is exactly why seeing your full picture in one place helps.
See what you can really afford
The rules here are national rules of thumb. Your own affordable rent depends on your full outgoings and how secure your income is. keel shows what you spend across every account and works out what is left after rent and bills, so you can plan around your real number rather than a percentage. It tells you what to do next, not just what happened. See how keel works.
Estimator
How much rent could you afford?
Enter your salary to see the range the rules of thumb point to, and what is left each month once rent and your other costs are paid. A typical estimate for context, not a recommendation.
At the cautious end (£750), about £643 a month is left for saving and everything else, after your other costs.
keel shows what’s really left after rent and bills for your own household, not a rule of thumb.
Take-home is worked out on 2026/27 income tax and National Insurance for England, Wales and Northern Ireland; Scotland’s income-tax bands differ. The rules of thumb are from MoneyHelper and Rightmove (see Sources below). Figures are national context, not advice on your own finances.
Common questions
How much rent can I afford on a £30,000 salary?
On a £30,000 salary, the common rules point to roughly £750 to £1,000 a month. The 30% of gross income rule gives £750, while the 40% figure that letting agents often allow gives £1,000. Take-home pay of about £2,090 a month suggests a similar £730 to £940 range.
What is the maximum rent I can afford?
As a rule of thumb, most guidance suggests keeping rent to no more than 30% of your gross income, though letting agents will often approve up to 40%. The honest maximum is lower if it leaves nothing for bills, food and saving, so it is worth checking what is left after rent, not just the percentage.
Is 40% of salary on rent too much?
Forty per cent of gross income is at the top of what most letting agents will approve, and it is common in high-cost cities. It is not automatically too much, but it leaves less room for bills, saving and surprises than the 30% rule of thumb. Measured against take-home pay, 40% of gross can be closer to half.
Should the 30% rule use gross or take-home pay?
The classic 30% rule is measured against gross, pre-tax income, and that is what letting agents reference. Because you actually live on your take-home pay, it is worth checking the figure both ways: 30 to 45% of take-home is a more realistic guide to what you can comfortably manage.
What rent can I afford on £40,000 or £50,000?
On £40,000, the rules point to roughly £1,000 to £1,335 a month, and on £50,000 to roughly £1,250 to £1,665. The lower end is 30% of gross income; the upper end is the 40% figure letting agents often allow. These are illustrative figures on 2026/27 tax, not a recommendation.
What is the 2% rule for renting?
The 2% rule is a United States property-investing guideline about rental yield for landlords, not a guide for tenants renting a home. It does not apply to working out how much rent you can afford in the UK. For that, the 30% of income rule of thumb is the usual starting point.
How do letting agents check if you can afford the rent?
Most use referencing that checks your annual income is at least 30 times the monthly rent, along with credit and employment checks. If your income is below that threshold, agents commonly ask for a guarantor, rent paid several months in advance, or a larger deposit.
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