Private Rent Growth Stalls: What It Means for Your Tax Bill

UK private rent growth held at 3.3% annually in June 2026, with the average monthly rent reaching £1,388. The figure comes from the ONS (Office for National Statistics) Index of Private Housing Rental Prices, as reported by Mortgage Solutions on 22 July 2026. Growth was flat on the rate recorded in May. For landlords on self-assessment (the annual tax return process for income not taxed at source), flat growth still means higher income - and a higher tax liability.

What the ONS Data Covers

The ONS Index tracks all UK private rents, including both existing tenancies and new lets. The 3.3% annual rise covers the twelve months to June 2026, and the same rate was recorded in the year to May 2026.

Growth has not accelerated, but it has not retreated either. Rents are higher in cash terms than they were a year ago. For landlords, that means taxable rental income is higher, and the liability on self-assessment rises with it. Where your income sits within the tax bands is worth checking at this point in the year - it is central to any sound property investment strategy.

What the Growth Rate Means for Your Tax Bill

Here is what 3.3% growth means in cash. The current average: £1,388/month. Twelve months ago the average stood at approximately £1,344/month - that is £1,388 divided by 1.033, rounded to the nearest pound. The monthly uplift is £44, which comes to £528 over a full year.

For example, if you hold a property at the UK average rent, your rental income is £528 higher this year than last. In England, Wales and Northern Ireland, the income tax on that additional sum depends on your marginal rate. At the basic rate of 20%, that is an additional £106. At the higher rate of 40%, it is £211. Scottish landlords are subject to different income tax bands and rates - speak to your accountant about the liability that applies in your case.

This calculation covers rental income only, before any deductions. Allowable costs - mortgage interest relief, maintenance, agents' fees - reduce the taxable figure. Your actual liability will differ. Property Filter's stress-test calculator can help you model the net position for your own portfolio. Landlords weighing incorporation should review the guidance on business structures, where rental income is taxed under different rules.

The Wider Picture

Advertised rents are a separate data point. Rightmove data, reported by Letting Agent Today on 16 July 2026, puts average advertised rents outside London at £1,397/month in Q2 2026, up 2.3% annually. London advertised rents averaged £2,791/month, up 2.9%. These figures cover new lets only and are not comparable to the ONS figure, which spans all tenancies.

Annual wage growth is running at 4.4%, per the same Rightmove data. Rents rising at 3.3% against wages easing at 4.4% narrows the affordability gap at the margin. Tenant affordability pressure has not gone away.

For landlords, a plateau in rent growth is a prompt to revisit income projections. Property Filter's free resources include tools to help you run the numbers on your own position.

Key takeaways

• Average UK private rent: £1,388/month in June 2026, up 3.3% annually (ONS, via Mortgage Solutions, July 2026)

• Growth rate unchanged from May 2026 - a plateau, not a reversal

• The 3.3% rise adds £528 to annual rental income per property at the UK average

• Additional income tax on that sum: £106 at the basic rate (20%) or £211 at the higher rate (40%), in England, Wales and Northern Ireland

• Scottish landlords face different income tax bands - verify your position with your accountant