Landlord Inheritance Tax UK 2026 — IHT and Buy-to-Let Portfolio Guide

How IHT applies to buy-to-let property

Rental properties are treated as investments, not business assets, for IHT purposes:

• The full market value of each rental property, less any outstanding buy-to-let mortgage secured against it, is included in your estate for IHT
• IHT is charged at 40% on the estate above the nil rate band (£325,000). If the estate is below £2 million, a further £175,000 RNRB may be available when passing a main residence to direct descendants
• Business Property Relief (BPR) does NOT apply to buy-to-let property — BPR is available for shares in unquoted trading companies, interests in trading partnerships, and certain business assets used in a trading business, not for passive investment in residential property
• Agricultural Property Relief (APR) is not relevant to standard buy-to-let properties — it applies only to agricultural land and farmhouses
• Example: a landlord with a £1.5m portfolio net of mortgages, plus a main home worth £350k and £50k in savings, has a gross estate of £1.9m. After the nil rate band (£325k) and RNRB (£175k), taxable estate is £1.4m. IHT at 40% = £560,000

Nil rate band and residence nil rate band

Two nil rate band allowances can reduce the IHT liability on a landlord's estate:

• Nil rate band (NRB): £325,000 — the threshold below which no IHT is charged. Frozen at this level until at least 2030. Any unused NRB on the first death can be transferred to a surviving spouse or civil partner, giving a combined NRB of up to £650,000
• Residence nil rate band (RNRB): up to £175,000 per person — applies only when a main residence (or the proceeds of its sale) is left to direct descendants (children, grandchildren). Buy-to-let properties do NOT attract the RNRB
• Combined threshold for couples: a married couple or civil partners can potentially pass up to £1 million free of IHT (£650,000 NRB + £350,000 RNRB) — but this requires passing the main home to children and qualifying assets to direct descendants
• Taper for large estates: the RNRB is withdrawn at £1 for every £2 of net estate above £2 million. Large buy-to-let portfolios frequently cause estates to exceed £2 million, wiping out the RNRB entirely
• Charitable giving: leaving at least 10% of the net estate to charity reduces the IHT rate from 40% to 36% — worth considering for landlords with philanthropic intentions and large estates

Lifetime gifts and the seven-year rule

Lifetime giving is the most direct way to reduce IHT exposure on a rental portfolio:

• Potentially Exempt Transfers (PETs): gifts made more than 7 years before death are fully exempt from IHT. Gifts within 7 years are potentially taxable, but taper relief reduces the rate from 40% (death within 3 years) to 8% (death 6–7 years after gift)
• Annual exemption: £3,000 of gifts per tax year are immediately exempt from IHT. Unused annual exemption can be carried forward one year only. A couple can give £6,000 per year (or £12,000 with the carried-forward exemption)
• Normal expenditure out of income: regular gifts from surplus income (not capital) are immediately exempt without a 7-year waiting period — this can be valuable for landlords with significant rental income exceeding their living costs
• Reservation of benefit: if you give away a property but continue to benefit from it (e.g. continue receiving the rent), the gift is a 'gift with reservation' and remains in your estate regardless of the 7-year rule
• Capital gains tax on gifts: gifting a buy-to-let property triggers CGT on any accumulated gain at market value at the date of gift. IHT planning and CGT planning must be considered together — the combined tax cost of gifting can be very substantial

Joint ownership, wills, and IHT

The way a property is owned and bequeathed significantly affects IHT:

• Joint tenants: on death, the property passes automatically by survivorship to the co-owner — it does not pass through the estate for ownership purposes, though its value may be included for IHT unless the survivor is a spouse or civil partner
• Tenants in common: each owner's share passes by will, allowing each to leave their share to children and use the nil rate band on the first death
• Spouse or civil partner exemption: transfers between spouses and civil partners (lifetime or on death) are completely exempt from IHT. This defers IHT to the second death but does not eliminate it
• Tax-efficient will structures: a will that passes buy-to-let property directly to children (absorbing the NRB) and the main home via the spouse (deferring IHT and preserving the RNRB on the second death) can maximise use of available allowances
• Discretionary trusts: buy-to-let properties can be held in discretionary trusts outside the landlord's estate (subject to 10-year anniversary charges at 6% on excess over NRB and exit charges), providing flexibility in who benefits — specialist legal and tax advice is required

Limited company structures and IHT

Holding buy-to-let properties in a company does not itself solve the IHT problem:

• Shares in a property investment SPV are still included in the shareholder's estate for IHT — they do not attract BPR because the company's activities are investment (letting property), not trading
• CGT holdover relief on gifts of unquoted shares: when gifting shares in an unquoted company (including a property SPV), holdover relief can defer the CGT on any gain, making lifetime gifting of shares potentially less costly than gifting property directly
• Family Investment Company (FIC): a FIC can shift income and capital growth to lower-rate taxpayers in the family over time, gradually reducing the value of the estate — but it does not immediately remove existing assets from the estate
• Interaction with Section 24: limited companies are not subject to the Section 24 mortgage interest restriction, so there is already an income tax reason to hold new purchases in an SPV for higher-rate taxpayers. The IHT position is neutral (neither better nor worse than personal ownership in most cases)
• Always take specialist property tax advice before restructuring: the interaction between IHT, CGT, SDLT on transfers to companies, Section 24, and the Renters' Rights Act 2025 means the optimal structure is highly fact-specific

Frequently asked questions