Inheritance Tax on Buy-to-Let: What Your Heirs Will Pay (2026/27)
Last updated 24 June 2026 · 9 min read · By the LandlordTaxAi Editorial Team
The short answer
Buy-to-let property is part of your estate and taxed at 40% Inheritance Tax above your nil-rate bands. Everyone has a £325,000 nil-rate band; the extra £175,000 residence band applies only to your home left to direct descendants — not rentals. Investment property also doesn’t get Business Property Relief.
Many landlords spend years building a portfolio without realising how much of it the taxman takes on death. Unlike a trading business, residential buy-to-let gets almost no special Inheritance Tax relief — it’s simply added to your estate and taxed at 40% above the thresholds.
The calculator above estimates the potential IHT on your estate including rentals. This guide explains the thresholds, why buy-to-let misses the home allowance, and the planning options. For valuing the gain side, see the CGT property calculator.
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Buy-to-Let Inheritance Tax Estimator
Estimate the Inheritance Tax on an estate including buy-to-let property for 2026/27.
Result
- Taxable profit (rent − expenses)
- £11,200
- Income Tax at 40%
- £4,480
- Less mortgage interest credit (20%)
- − £1,000
- Tax due on this property
- £3,480
- Income after tax
- £7,720
NRB £325,000, residence band £175,000 (home to descendants only), 40% rate. Estimate only — take advice.
The thresholds and the 40% rate
Inheritance Tax is charged at 40% on the value of your estate above your available nil-rate bands. There are two bands, and buy-to-let only benefits from one of them.
| Allowance | Amount (2026/27) | Applies to buy-to-let? |
|---|---|---|
| Nil-rate band | £325,000 | Yes — covers all assets including rentals |
| Residence nil-rate band | £175,000 | No — only your home left to direct descendants |
| Spouse/civil partner transfers | Unlimited | Yes — no IHT between spouses |
A married couple can combine nil-rate bands (up to £650,000, or £1m including two residence bands for a home) — but the residence band still never applies to buy-to-let property.
Why buy-to-let is hit harder
Two features make rentals especially exposed to IHT.
First, the residence nil-rate band (£175,000) is only for a home passed to children or grandchildren — a let property never qualifies. Second, residential buy-to-let is an investment, so it doesn’t get Business Property Relief, which can take trading businesses out of IHT entirely.
- Rentals use only the £325,000 nil-rate band, not the £175,000 residence band
- No Business Property Relief for investment property
- The whole market value counts, even with a mortgage outstanding (the debt reduces the estate, not the property’s IHT status)
- A growing portfolio can quietly push an estate well past £1m
The residence nil-rate band also tapers away by £1 for every £2 your estate exceeds £2m — so a large property portfolio can lose even the home allowance.
Planning options (with care)
You can’t make buy-to-let IHT-free, but several strategies reduce the eventual bill. All have trade-offs and need professional advice.
Plan your portfolio’s legacy
LandlordTaxAi keeps an accurate value of your property business year to year, giving you the numbers to plan succession and Inheritance Tax with your adviser.
See how it worksA worked example
Margaret, a widow, leaves an estate of £900,000: her £400,000 home (to her children) and £500,000 of buy-to-let. She inherited her late husband’s nil-rate bands.
| Nil-rate band (×2, from spouse) | £650,000 |
| Residence nil-rate band (×2) — home to children | £350,000 |
| Total allowances used (capped at estate/home value) | covers home + most |
| Estate £900,000 − allowances ≈ £650k+£250k home | ≈ taxable balance |
| IHT at 40% on the uncovered buy-to-let value | Significant — model precisely |
The home is largely sheltered by the residence band, but the buy-to-let only gets the standard nil-rate band — so much of its £500,000 value is exposed at 40%. The calculator above sizes this for your estate.
Frequently asked questions
Is buy-to-let subject to Inheritance Tax?
Yes. Rental property is part of your estate and taxed at 40% above your nil-rate bands. It gets no special relief as an investment.
What are the IHT thresholds for 2026/27?
A £325,000 nil-rate band for everyone, plus a £175,000 residence nil-rate band — but the residence band only applies to your home left to direct descendants, not rentals.
Why doesn’t buy-to-let get the £175,000 allowance?
The residence nil-rate band is only for a home passed to children or grandchildren. A let property isn’t your residence, so it doesn’t qualify.
Does Business Property Relief cover my rentals?
No. Residential buy-to-let is treated as an investment, which doesn’t qualify for Business Property Relief.
Does the mortgage reduce the IHT?
The outstanding mortgage reduces the value of your estate, so it lowers the IHT — but the property itself still counts at market value.
Can I avoid IHT by gifting property?
Gifts can leave your estate after 7 years, but gifting triggers CGT and means giving up the rent. Take advice before acting.
Written and reviewed by the LandlordTaxAi Editorial Team. Our guides are reviewed against current HMRC guidance and updated when the rules change. Operated by LandlordTaxAi, United Kingdom. Follow us on LinkedIn.
Last reviewed: 24 June 2026 · Researched against primary UK sources for the 2026/27 tax year: https://www.gov.uk/government/publications/inheritance-tax-nil-rate-band-and-residence-nil-rate-band-thresholds-from-6-april-2026/inheritance-tax-nil-rate-band-and-residence-nil-rate-band-thresholds-from-6-april-2026-to-5-april-2028; https://www.gov.uk/inheritance-tax; https://www.gov.uk/guidance/inheritance-tax-residence-nil-rate-band. This article is informational only and does not constitute tax advice. Check the latest details on GOV.UK or with a qualified accountant.