Agricultural Property Relief and IHT: The GBP 1m Cap Explained 2026/27

Agricultural Property Relief (APR) and Business Property Relief (BPR) have long been the cornerstones of inheritance tax planning for farmers and family business owners. From April 2026, both reliefs have been fundamentally restructured with a combined GBP 1 million cap. This is not a minor adjustment -- it is the most significant change to agricultural IHT planning in a generation, and the impact on farming families with land worth millions of pounds is substantial.

What APR and BPR Were Before April 2026

APR allowed qualifying agricultural property to be passed on free of inheritance tax, at 100% relief for owner-occupied farmland and 50% relief for let land (though in practice 100% was often available for let land meeting certain conditions). BPR offered 100% relief on qualifying business assets, including unlisted shares and sole trader/partnership interests.

There was no monetary cap. A farm worth GBP 5 million qualifying entirely for APR would pass to the next generation with a zero IHT liability.

The New Rules From April 2026

From 6 April 2026, APR and BPR are subject to a combined GBP 1 million cap:

• On the first GBP 1,000,000 of combined qualifying APR and BPR assets: 100% relief applies, resulting in zero IHT
• On qualifying assets above GBP 1,000,000: only 50% relief is available

The 50% relief on the excess means that the taxable value of assets above GBP 1 million is half their market value, and that taxable value is then subject to IHT at 40%.

Effective rate on assets above the GBP 1m threshold: 40% x 50% = 20% effective IHT rate on the excess.

The Nil Rate Band and Residence Nil Rate Band

The GBP 1 million APR/BPR cap sits alongside (not instead of) the standard IHT nil rate band of GBP 325,000 and the residence nil rate band of GBP 175,000 -- giving a potential combined threshold of GBP 500,000 for a single person (or GBP 1 million for a couple using both nil rate bands) before any IHT applies to non-qualifying assets.

These allowances apply to all estate assets. The APR/BPR cap is a separate layer specifically for qualifying agricultural and business assets.

A Practical Example

Consider a farming couple with a joint estate comprising:

• Farmhouse: GBP 400,000 (qualifying APR)
• Agricultural land: GBP 2,000,000 (qualifying APR)
• Farm machinery and livestock: GBP 300,000 (qualifying BPR)
• Cash and investments: GBP 200,000

Total qualifying APR/BPR assets: GBP 2,700,000

Under the old rules, all GBP 2,700,000 of agricultural/business assets would have qualified for 100% relief. The GBP 200,000 of non-qualifying assets would have been covered by the couple's combined nil rate bands.

Under the new rules:

• First GBP 1,000,000 of APR/BPR assets: 100% relief, so zero taxable
• Remaining GBP 1,700,000 of APR/BPR assets: 50% relief, making GBP 850,000 taxable
• GBP 200,000 non-qualifying assets: covered by nil rate bands
• IHT due: GBP 850,000 at 40% = GBP 340,000

A family that previously expected zero IHT now faces a GBP 340,000 bill. For a cash-poor farming operation, this could require selling land.

How HMRC Applies the Cap With Multiple Assets

Where an estate has both APR and BPR qualifying assets, the GBP 1 million cap is shared between them. HMRC has indicated the cap will be allocated proportionally across qualifying assets, though estates can structure claims to maximise relief where possible. Specialist legal and tax advice is essential for complex estates.

Let vs Owner-Occupied Land

Agricultural land that is let may only qualify for 50% APR rather than 100% APR unless specific conditions are met. Under the new regime, let land qualifying for only 50% APR still counts against the GBP 1 million cap at its full value, with the relief applying within the cap structure.

Planning Implications

Lifetime gifts -- assets given away during your lifetime and surviving the seven-year period fall outside your estate entirely, avoiding both the cap and IHT. Transferring land to the next generation earlier, with appropriate legal structures to protect the donor, is now an even more pressing planning option.

Trusts -- discretionary trusts and other structures may help manage the exposure, but they carry their own IHT periodic and exit charges. The landscape requires detailed analysis.

Life assurance -- a whole-of-life policy written in trust can provide a lump sum to cover the IHT bill on death, avoiding forced asset sales. Premiums are an ongoing cost but may be far less than the eventual tax bill.

Agricultural tenancies -- the balance between let and owner-occupied land in your portfolio may now need reviewing from an IHT perspective.

The October 2024 Budget announcement of this reform provoked significant protest from the farming community. While subsequent government consultations have explored transitional concessions, the core GBP 1 million cap is in force from April 2026.

Use the CalcHub inheritance tax calculator to estimate IHT exposure on a farming estate under the new APR/BPR cap rules.