Aim to keep rent at or below about 30% of your gross (before-tax) income. That is the line the Office for National Statistics uses to call rent “affordable”. Letting agents test something different: many want your annual income to be at least 30 times the monthly rent, which lets rent reach 40% of your gross monthly pay.
Two different 30s
The two rules sound alike but give very different answers.
- 30% of income. Your rent is no more than 30% of what you earn before tax. The ONS uses this as its affordability threshold in its private rental affordability statistics for England, Wales and Northern Ireland.
- 30 times the monthly rent. Your annual income is at least 30 times one month’s rent. Rightmove’s renter guide says referencing providers typically look for this, or for gross monthly income of at least 2.5 times the rent. The referencing firm Vouch calls 30 times “the industry standard” for tenants and 36 times for guarantors.
Thirty times the monthly rent is the same as rent of one-thirtieth of your yearly pay. Spread over 12 months, that is 40% of your gross monthly income. Rightmove’s guide puts it the same way: the threshold “is typically assessed at around 40% of your income”.
What the gap looks like in pounds
Here is the same salary run through both rules. The 30× column is the most an agent’s 30× test would allow. It is a pass mark, not a target.
| Gross salary | 30% of gross pay (per month) | 30× rule maximum (per month) | 30× rule as % of gross |
|---|---|---|---|
| £24,000 | £600 | £800 | 40% |
| £30,000 | £750 | £1,000 | 40% |
| £36,000 | £900 | £1,200 | 40% |
| £45,000 | £1,125 | £1,500 | 40% |
On £36,000, 30% of your pay is £10,800 a year, or £900 a month. The 30× test lets you pass with rent up to £36,000 ÷ 30 = £1,200 a month. That is £300 a month more than the 30% guide.
So passing referencing tells you an agent will accept you. It does not tell you the rent will feel comfortable once tax, bills and everything else come out.
Why take-home pay matters for your own budget
Both rules use gross pay because it is easy to check on a payslip or contract. But you pay rent from what lands in your bank account, after Income Tax, National Insurance, pension contributions and any student loan. The same rent takes a much bigger bite out of take-home pay.
When you budget for yourself, start from take-home pay and list what else has to come out of it: council tax, energy, water, broadband, travel, food and debt repayments. Our guide to bills when renting covers which costs usually land on tenants.
Worked example (fictional)
Sam earns £36,000 a year. To keep things simple, assume Sam’s take-home pay after deductions is £2,450 a month. This take-home figure is made up for the example, not a tax calculation.
| Rent option | Monthly rent | Share of take-home | Left after rent |
|---|---|---|---|
| At the 30% of gross guide | £900 | 36.7% | £1,550 |
| At the 30× agent limit | £1,200 | 49.0% | £1,250 |
At £1,200, Sam would pass a 30× affordability check. But nearly half of Sam’s take-home pay would go on rent, leaving £1,250 for bills, food, travel and savings. At £900 the rent is still more than a third of take-home pay, which shows why the 30% guide is a ceiling for many people rather than a comfortable middle.
How rents compare with incomes across the UK
The ONS’s latest private rental affordability bulletin (published 18 August 2025, covering the financial year ending 2024) found:
| Area | Average rent as % of median private-renting household income |
|---|---|
| England | 36.3% |
| Wales | 25.9% |
| Northern Ireland | 25.3% |
| London | 41.6% |
| North East England | 19.8% |
England as a whole sits above the 30% threshold, mainly because of London. Most English regions are below it. The bulletin does not yet cover Scotland. Note that these are household incomes, so a couple or house-share counts all earners together.
If you want to see what salary different regions need, read salary needed to rent by region.
Check your own numbers
Use the rent affordability calculator to see what rent fits your income under both the 30% guide and the agent’s 30× test. If you are applying with someone else, the same check works on your combined income, though some agents assess each person’s share separately.
A few tips:
- Treat the 30× figure as the most an agent will accept, not as your budget.
- Run your take-home pay against the rent plus bills before you apply.
- If you fall short on the 30× test, a guarantor may help. Vouch says it looks for guarantors earning 36 times the monthly rent.
Related: How much can a landlord increase your rent?
Sources
- ONS: Private rental affordability, England, Wales and Northern Ireland: 2024, checked 4 October 2026
- Rightmove: Preparing for reference checks, checked 4 October 2026
- Vouch: Tenant FAQ, checked 4 October 2026
This guide is general information, not legal or financial advice. Report a possible error.