Conservative - Tax
Reverse business inheritance-tax changes
Restore more generous business property relief from inheritance tax for qualifying family businesses.
Last updated: May 2026.
Relief baseline
The baseline is the post-Budget restriction on business property relief. The official note shows the largest claims account for a large share of relief cost.
- Direct gain goes to business-owning estates.
- Liquidity risk may fall for some firms.
- Revenue loss and avoidance risk are material.
Core trade-offs
The policy reduces succession-tax pressure for family businesses. It also subsidises inherited business wealth and can preserve assets that might otherwise be sold or restructured.
- Some business continuity improves.
- The Exchequer loses IHT receipts.
- Wealth inequality risks increase.
Fiscal impact by 2028-29
+GBP 0.3bn to +GBP 2.0bn. Central estimate: +GBP 0.9bn.
- Positive numbers mean net fiscal cost; negative numbers mean Exchequer savings.
- Main cost is lower inheritance-tax receipts.
- Continuity benefits are not scored as fiscal savings.
- Estate-planning response could be large.
- This is not an official costing.
Economic impact by 2028-29
- Jobs: May protect some family firms; weak firms may also be preserved.
- Wages: No direct wage gain; effects depend on business investment.
- Prices: Little direct price effect expected.
- GDP / productivity: Mixed: succession stability versus weaker reallocation and tax planning.
Assessment
The policy may help genuine succession problems in illiquid family firms. But broad BPR is expensive relative to the number of estates affected and creates strong planning incentives for high-wealth households.
Confidence: Medium-low. Official relief-distribution evidence is useful; behavioural avoidance response is hard to estimate.
Main risks
- Wealth sheltering: High-wealth estates may use business assets to shelter inheritance.
- Low productivity: Relief can preserve ownership structures that are not efficient.
- Revenue loss: Costs rise if planning expands claims beyond current patterns.
Safeguards
- Limit relief to trading businesses.
- Cap gains for passive investors.
- Report claims by estate value and sector.
Academic evidence
Mirrlees and review team, Institute for Fiscal Studies and Oxford University Press, 2011
Tax design principles
Efficient tax systems use broad bases, coherent rates and few arbitrary reliefs.
Frames the efficiency trade-off when tax cuts are not matched by credible funding.
Saez, Slemrod and Giertz, Journal of Economic Literature, 2012
Taxable-income responses
Higher-income taxpayers respond more strongly to tax-rate changes through avoidance, timing and real behaviour.
Important where the policy changes top-pay, capital or business-tax incentives.
The Elasticity of Taxable Income with Respect to Marginal Tax Rates (2012)
UK government evidence
HM Treasury and HMRC, 2026
APR and BPR changes
The policy note states most claims remain below the allowance, while the largest estates account for high relief costs.
Anchors farm and business inheritance-tax reversals.
Agricultural property relief and business property relief changes (2026)
HM Treasury, 2024
Autumn Budget 2024
The Budget introduced private-school VAT, APR/BPR changes and Energy Profits Levy reforms.
Sets the policy baseline Conservatives propose to reverse.
HM Revenue and Customs, 2025
HMRC tax ready reckoner
HMRC provides direct-effect estimates for illustrative changes to SDLT, VAT, fuel duties and other taxes.
Anchors tax costs before behavioural and macro adjustments.
Sources
- PolicyLens methodology: Reverse business inheritance-tax changes Internal - PolicyLens, 2026
- Agricultural property relief and business property relief changes Tax policy note - HM Treasury and HMRC, 2026
- Autumn Budget 2024 UK government report - HM Treasury, 2024
- Direct effects of illustrative tax changes bulletin UK government statistics - HM Revenue and Customs, 2025
- Tax by Design: The Mirrlees Review Academic review - Mirrlees and review team, Institute for Fiscal Studies and Oxford University Press, 2011
- The Elasticity of Taxable Income with Respect to Marginal Tax Rates Academic article - Saez, Slemrod and Giertz, Journal of Economic Literature, 2012
- Our Plan for Britain Party policy source - Conservative Party, 2026
Other Conservative policies
PolicyLens estimates are illustrative and should not be treated as official costings.