Inheritance Tax When Second Parent Dies: Complete UK Guide
Inheritance tax when your second parent dies in the UK. Understand nil-rate bands, transferable allowances, and how to reduce your IHT bill in 2026/27.
When a second parent passes away, the inheritance tax position becomes particularly important. This is typically the point at which the estate passes to the children or other beneficiaries, and the tax consequences can be significant.
The UK inheritance tax system includes valuable allowances that can help families pass on substantial wealth without paying tax. The nil-rate band has been frozen at £325,000 since 2009, and the residence nil-rate band adds £175,000 per person when a home passes to direct descendants. For married couples and civil partners, these allowances can be combined to provide up to £1 million tax-free, where all qualifying conditions are met, including eligibility for the full Residence Nil-Rate Band and no tapering for large estates.
This guide explains everything you need to know about inheritance tax when the second parent dies. It covers nil-rate bands, transferable allowances between spouses, the residence nil-rate band, practical strategies to reduce or avoid IHT, and real-world examples using current tax rates.
For more on inheritance tax planning, our how to avoid inheritance tax guide covers wider strategies. If you are dealing with HMRC warnings about IHT, our inheritance tax warning guide explains the latest data.
The nil-rate band is £325,000 per person. The residence nil-rate band is £175,000 per person. Married couples and civil partners can combine these allowances to pass on up to £1 million tax-free, subject to qualifying conditions.
Understanding Inheritance Tax Basics
Inheritance Tax is a tax on the estate of someone who has died. The estate includes property, money, and possessions.
At the time of writing, IHT is charged at 40% on the value of an estate above the tax-free threshold. The nil-rate band is £325,000 per person. The residence nil-rate band is £175,000 per person when passing a home to direct descendants. The combined maximum allowance for a couple can reach up to £1,000,000, assuming all qualifying conditions are met.
The IHT rate can be reduced to 36% if 10% or more of the net estate goes to charity.
IHT is charged at 40% above the nil-rate band. The combined allowances for a couple can reach £1 million subject to qualifying conditions. The rate reduces to 36% with a charitable donation of 10% or more.
What Happens When the Second Parent Dies
When both parents have passed away, the inheritance tax situation becomes crucial because this is typically when beneficiaries inherit the estate.
The Critical Difference: Transfers Between Spouses vs. Children
When the first parent dies, everything left to a surviving spouse or civil partner is completely exempt from IHT. This is called spouse exemption. There is no limit on the amount that can be passed tax-free between spouses.
When the second parent dies, the estate passes to beneficiaries such as children, grandchildren, or others. This is where IHT may apply and where planning matters most.
Transferable Nil-Rate Band
The UK's inheritance tax rules include a crucial benefit: unused nil-rate band from the first spouse can be transferred to the surviving spouse. This effectively doubles the tax-free allowance.
For example, if the first parent died in 2020 and left everything to the surviving spouse, their £325,000 nil-rate band remains unused. When the second parent dies, the estate can use both the second parent's NRB of £325,000 and the transferred first parent's NRB of £325,000, giving a total of £650,000 tax-free.
This transferable allowance applies even if the first spouse died years ago when the nil-rate band was lower. The transfer is calculated as a percentage of the unused allowance, then applied to the threshold in force at the time of the second death.
Our inheritance tax guide for second parent death covers the transfer process in detail.
Unused nil-rate band from the first spouse can be transferred to the surviving spouse. This can double the tax-free allowance to £650,000 for a couple. The transfer is calculated as a percentage of the unused allowance.
Residence Nil-Rate Band
Introduced in 2017, the Residence Nil-Rate Band provides additional IHT relief when you pass your main residence to direct descendants. Direct descendants include children, grandchildren, step-children, adopted children, and foster children.
At the time of writing, the RNRB is £175,000 per person. It is transferable between spouses and civil partners, so a couple can claim up to £350,000, subject to qualifying conditions.
Tapered Withdrawal for Large Estates
The RNRB is reduced by £1 for every £2 the estate exceeds £2 million. For example, an estate valued at £2,400,000 would have an excess of £400,000 over £2m. The RNRB reduction would be £400,000 ÷ 2 = £200,000, which exceeds the £175,000 allowance, so the RNRB is reduced to zero.
Estates above £2,350,000 receive no RNRB at all.
The Residence Nil-Rate Band adds £175,000 per person when a home is passed to direct descendants. It is transferable between spouses, giving up to £350,000 for a couple subject to qualifying conditions. The RNRB is tapered for estates over £2 million.
Complete IHT Calculation: Second Parent Dies Example
The following examples assume there are no previous lifetime gifts, failed Potentially Exempt Transfers, trusts, or other factors that could affect the inheritance tax calculation. Actual liability may vary depending on individual circumstances.
Scenario: The Johnson Family
Mother died in 2015 and left everything to father. No IHT was due because of spouse exemption. Mother's nil-rate band of £325,000 was 100% unused.
Father dies with an estate of £850,000, including a family home worth £400,000. The estate passes to their two children.
Step 1: Calculate Available Nil-Rate Bands
Father's NRB: £325,000
Mother's transferred NRB: £325,000
Total NRB: £650,000
Father's RNRB: £175,000
Mother's transferred RNRB: £175,000
Total RNRB: £350,000
Combined Tax-Free Allowance: £650,000 + £350,000 = £1,000,000
Step 2: Calculate IHT Liability
Estate value: £850,000
Tax-free allowance: £1,000,000
Taxable amount: £0
IHT due: £0
The Johnson children inherit the full £850,000 with no inheritance tax.
In this example, the combined allowances of £1 million exceed the £850,000 estate, so no IHT is due. The children inherit the full amount tax-free.
Example 2: Estate Exceeding the Threshold
Scenario: The Williams Family
First parent died in 2018, leaving everything to the surviving spouse. Second parent dies with an estate of £1,400,000, including a £500,000 family home. The beneficiaries are three children.
IHT Calculation:
Combined NRB: £650,000
Combined RNRB: £350,000
Total tax-free: £1,000,000
Estate value: £1,400,000
Tax-free allowance: £1,000,000
Taxable amount: £400,000
IHT at 40%: £400,000 × 0.40 = £160,000
Net Inheritance: £1,400,000 - £160,000 = £1,240,000 or £413,333 per child.
In this example, the estate exceeds the combined allowances by £400,000, resulting in an IHT bill of £160,000. Each child receives £413,333 after tax.
How to Reduce Inheritance Tax
While IHT can be substantial, there are legitimate strategies that may reduce or eliminate it where the relevant HMRC conditions are met.
1. Make Use of Lifetime Gifts
Each person can give away £3,000 per year tax-free under the annual exemption. Unused allowance can be carried forward one year. You can also give up to £250 per person to as many people as you like. Wedding gifts of up to £5,000 for a child, £2,500 for a grandchild, or £1,000 for anyone else are also exempt.
The seven-year rule means gifts made more than seven years before death are completely exempt from IHT. Gifts within seven years may be taxable on a sliding scale.
2. Gifts from Regular Income
Gifts made from surplus income can be immediately exempt from IHT if they are part of your normal expenditure, made from income after maintaining your standard of living, and documented and regular. This is valuable for parents with good pension or rental income who want to help children during their lifetime.
3. Leave Money to Charity
Leaving 10% or more of your net estate to charity reduces the IHT rate from 40% to 36%. The donation itself is IHT-free. This allows the charity to benefit while the family may pay less tax.
4. Use of Trusts
Trusts can be complex but may serve as tools for IHT planning in certain circumstances. It is important to understand that trusts do not automatically remove assets from an estate. Different trust types have different inheritance tax treatments and may be subject to entry charges, periodic charges, exit charges, or other HMRC rules.
Discretionary trusts give trustees flexibility while removing assets from the estate for certain IHT purposes. Bare trusts are simple trusts for children or grandchildren. Life interest trusts allow the surviving spouse to receive income while capital passes to children.
Trust rules changed in 2006, and many trusts now face their own IHT charges. Specialist advice from a qualified tax professional or solicitor is strongly recommended before establishing any trust.
5. Business and Agricultural Relief
If the estate includes a trading business, shares in an unquoted trading company, or agricultural property, these may qualify for IHT relief. Business Relief provides 100% relief for qualifying trading businesses and 50% for some agricultural tenancies. However, relief is subject to detailed statutory conditions and qualifying trading activities. Not all businesses automatically qualify, and the rules are complex.
6. Life Insurance Written in Trust
A life insurance policy designed to pay the IHT bill, written in trust, pays out directly to beneficiaries outside the estate. This provides cash to pay HMRC without forcing the sale of property or assets. Policy proceeds do not count as part of the estate if properly structured.
7. Pension Planning
Pensions are generally outside the estate for inheritance tax purposes under current rules. However, treatment depends on the type of pension, applicable legislation, and individual circumstances. Money left in pensions may pass to beneficiaries without IHT, though income tax may apply depending on age at death. Under 75, the pension can usually be inherited tax-free. Over 75, beneficiaries pay income tax at their marginal rate.
Our how to avoid inheritance tax guide covers these strategies in more detail.
Lifetime gifts, regular gifts from income, charitable donations, trusts, business relief, life insurance in trust, and pension planning may reduce IHT where relevant conditions are met. Each strategy has specific requirements and should be considered with professional advice.
Common Mistakes to Avoid
Not claiming transferable nil-rate band. Executors must actively claim the transferable allowance from the first spouse. It is not automatic. Form IHT402 or IHT217 must be completed.
Ignoring the residence nil-rate band. Many estates qualify for RNRB but fail to claim it, paying unnecessary tax. Ensure the family home passes to direct descendants to qualify.
Making large gifts too late. The seven-year rule means gifts made shortly before death may still be taxable. Start gifting early for maximum benefit.
Poor record-keeping. HMRC requires proof of regular gifts from income. Keep detailed records showing income received, normal expenditure, surplus available, and gifts made with dates.
DIY complex trusts. While simple planning is appropriate in some cases, complex estates require specialist advice. The cost of engaging a qualified professional is typically far less than the cost of errors in trust structures or missed reliefs.
Common mistakes include failing to claim transferable allowances, ignoring the residence nil-rate band, making gifts too late, poor record-keeping, and DIY trusts. Professional advice is recommended for complex estates.
When IHT Is Paid and Who Pays It
IHT must be paid within six months of death, with some exceptions. The tax typically must be settled before probate is granted.
The executors named in the will or administrators if there is no will are responsible for paying IHT. The tax is paid from the estate before distribution to beneficiaries.
Payment methods include direct from estate bank accounts, sale of assets, IHT payment by instalments over 10 years for property and some business assets, or bridging loans if assets cannot be quickly liquidated.
IHT is due within six months of death and must be paid before probate. Executors are responsible for payment from the estate. Instalment options are available for property and some business assets.
Estate Planning Checklist
Consider these practical steps for estate planning.
- Make a will – essential for controlling who inherits and potentially saving IHT
- Review beneficiaries – ensure your wishes are current
- Calculate potential IHT – know if your estate faces tax
- Consider lifetime gifts – use annual exemptions and the seven-year rule
- Document regular gifts – keep records for gifts from income
- Review life insurance – consider a policy written in trust
- Charitable giving – explore the 10% rule for reduced rate
- Professional advice – complex estates benefit from specialist help
- Keep records updated – inform executors where to find documents
- Communicate with family – avoid surprises and disputes
Early planning through wills, lifetime gifts, and professional advice may reduce IHT. Keep records updated and communicate with family to avoid disputes.
Real-World Case Studies
Case Study 1: The £800,000 Estate (No IHT)
Both parents deceased. Mother died in 2019, father died in 2024. Combined estate: £800,000. Family home: £350,000 to children. Savings and investments: £450,000.
Combined NRB: £650,000
Combined RNRB: £350,000
Total allowance: £1,000,000
IHT due: £0
The full estate passes to children tax-free.
Case Study 2: The £2,200,000 Estate (Significant IHT)
Second parent died. Estate: £2,200,000. Family home: £900,000 to children. Other assets: £1,300,000.
Estate exceeds £2m, so RNRB is tapered. Excess over £2m: £200,000. RNRB reduction: £200,000 ÷ 2 = £100,000. Combined RNRB: £350,000 - £100,000 = £150,000. Combined NRB: £650,000. Total allowance: £800,000.
Taxable: £2,200,000 - £800,000 = £1,400,000
IHT at 40%: £560,000
Net inheritance: £1,640,000.
What if they had gifted £200,000 over previous years?
Estate would be £2,000,000 with no RNRB taper. Full RNRB of £350,000 would apply. Total allowance: £1,000,000. Taxable: £1,000,000. IHT: £400,000.
Potential saving: £160,000 plus the £200,000 already gifted.
Strategic gifting may save significant IHT where conditions are met. In the example, gifting £200,000 over previous years could save £160,000 in tax, plus the £200,000 already transferred.
Final Thoughts
Inheritance tax when the second parent dies can be a significant financial event for families. With proper understanding of the rules, particularly the transferable nil-rate band and residence nil-rate band, many estates can pass completely tax-free to the next generation.
For estates above the thresholds, strategic planning during your lifetime through gifts, charitable giving, and other legitimate strategies may reduce the tax burden, ensuring more of your wealth benefits your loved ones rather than HMRC.
Planning early, keeping good records, and seeking professional advice for complex situations are essential steps. The cost of professional advice is typically far less than the tax that could otherwise be payable.
All information in this guide is based on official HMRC and GOV.UK sources. Readers should seek professional advice before implementing any inheritance tax planning strategies, as rules are complex and subject to change.
Written by
Mia Carragher
Mia writes beginner-friendly UK tax and personal finance guides, with a focus on income tax, National Insurance, salary calculators and simple HMRC explainers.
See more from Mia Carragher