Inheritance Tax Will Planning UK — 2026 Guide to Reducing Your IHT Bill

Inheritance tax (IHT) is one of the most punishing taxes in the UK, charging 40% on everything you leave above the threshold. With property prices having pushed millions of estates over the nil-rate band, and recent research suggesting affluent UK families could lose £12.3 billion in preventable inheritance tax through late or poor estate planning, getting your will right has never mattered more.

The good news: a properly structured will is the single most effective tool for legally reducing your inheritance tax bill. In this 2026 guide, we explain exactly how inheritance tax works, how the right will can cut what your family pays, and which online will writing services make IHT-aware wills easy and affordable.

Legal disclaimer: This website provides information about will writing services. We are not solicitors and do not provide legal advice. Inheritance tax planning can be complex — for large or unusual estates, always consult a qualified solicitor or tax adviser.

What Is Inheritance Tax and How Does It Work?

Inheritance tax is the tax paid on your estate — everything you own (property, savings, investments, possessions) minus any debts — when you die. The rules for 2026 are:

The Tapering Trap

The Residence Nil-Rate Band starts to taper away by £1 for every £2 your estate is worth above £2 million. By £2.35 million, the entire RNRB has disappeared. This is why high-value estates need active planning — not just a basic will.

How a Will Reduces IHT — The Core Mechanisms

A will lets you direct who gets what, which directly controls how much tax is due. The key mechanisms are:

1. Spouse exemption — Anything left to a spouse or civil partner is completely tax-free, no matter the amount.
2. Nil-rate band utilisation — You can structure your will so the first £325,000 goes to children or a trust, rather than automatically to your spouse, preserving the allowance.
3. Residence nil-rate band — Leaving your main home to children or grandchildren unlocks up to an extra £175,000 tax-free.
4. Trust wills — Placing assets in a trust on death can remove them from the survivor’s estate for IHT purposes.
5. Charitable gifts — Leaving 10% or more of your net estate to charity reduces the IHT rate from 40% to 36%.
6. Lifetime gifting — A will works alongside a gifting strategy; gifts made more than 7 years before death fall outside your estate.

Trust Wills: The Most Powerful IHT Reduction Tool

A trust will (sometimes called a “protective property trust will” or “discretionary trust will”) places some or all of your assets into a trust when you die, rather than passing them outright to your beneficiaries. This can dramatically reduce inheritance tax, especially for couples and those with property worth more than the nil-rate band.

How a Property Trust Will Works for Couples

Here’s a common scenario for married couples who own their home jointly:

• Without a trust will: The first spouse dies, everything passes to the survivor. The survivor now owns the entire property. When the survivor dies, the whole estate is assessed for IHT — potentially well above the £1 million combined threshold if the property has grown.
• With a property trust will: The first spouse leaves their share of the property (up to the £325,000 nil-rate band) to a life-interest trust for the survivor, rather than outright. The survivor has the right to live in the home for life, but the trust share is outside the survivor’s estate for IHT. This can save up to £130,000 in tax (£325,000 × 40%).

Types of Trust Will

Important: Trust wills involve ongoing trust administration and potential entry charges (up to 20% of the amount settled above the NRB for discretionary trusts). For estates significantly above the thresholds, professional advice is strongly recommended.

Inheritance Tax Will Planning — Step by Step

Step 1: Calculate Your Estate’s IHT Exposure

Before you can plan, you need to know your exposure. Add up:

• Your home’s current market value
• Savings, investments and pensions (note: some pensions pass outside the estate)
• Life insurance policies written in trust (these may already be outside the estate)
• Any other property or valuable possessions
• Subtract: mortgages, loans, and other debts

If the total for an individual is above £500,000, or above £1 million for a couple, IHT planning in your will is worth doing.

Step 2: Check the Residence Nil-Rate Band

You get the extra £175,000 RNRB only if you leave your main home (or a share of it) to direct descendants — children, grandchildren, or step-children. If you leave your home to a sibling, niece, or friend, you don’t get the RNRB. This alone can mean a £70,000 difference in tax.

If your home is worth less than £175,000, you get the RNRB up to its value. If you downsize or move to a care home, you may still be entitled to a “downsizing addition.”

Step 3: Choose the Right Will Structure

Step 4: Use Lifetime Gifts Alongside Your Will

Your will is your foundation, but lifetime gifts are the other half of the strategy. Key rules:

• Annual exemption: £3,000 per year, tax-free.
• Small gifts: Up to £250 per person per year, unlimited recipients.
• Wedding gifts: Up to £5,000 to a child, £2,500 to a grandchild, £1,000 to anyone else.
• 7-year rule: Larger gifts are potentially exempt transfers (PETs). If you survive 7 years, they’re completely outside your estate. If you die within 7 years, they’re taxed on a sliding scale (taper relief applies after 3 years).

A will that names backup beneficiaries ensures that if a gift fails (because you die within 7 years), the asset still goes where you want it to.

Step 5: Review and Update Every 3–5 Years

Inheritance tax thresholds have been frozen at £325,000 (NRB) and £175,000 (RNRB) until at least 2028. With property inflation, this drags more estates into the tax net each year. Review your will every few years and whenever there’s a major life event — marriage, divorce, birth, death, or a significant change in asset values.

Best Online Will Services for IHT Planning (2026)

Not every online will service handles trust wills or IHT-aware structures. Here are our top recommendations, ranked by suitability for inheritance tax planning.

🥇 1. Farewill — Best Overall for IHT-Aware Wills

Rating: 9.7/10

Farewill is the UK’s highest-rated will writer and our top pick for inheritance tax planning. Their will-writing platform guides you through options like specifying how your estate is divided, naming backup beneficiaries, and structuring charitable gifts to unlock the 36% IHT rate. For more complex needs, Farewill offers access to specialist support.

Pros:

• Fastest, most user-friendly will writing experience in the UK
• Excellent prompts for estate planning decisions that affect IHT
• Outstanding Trustpilot rating — most reviewed will writer in the UK
• Affordable entry price with specialist options for complex estates

Cons:

• Fully bespoke trust wills may require their specialist (higher-tier) service
• Not a substitute for a solicitor for very large estates (£2m+)

👉 Write your will with Farewill

🥈 2. Make a Will Online — Solid, Affordable Option

Rating: 8.4/10

Make a Will Online is a long-established UK service offering straightforward wills with clear estate-planning options. It’s a good choice for those with simpler estates who still want to make sure their nil-rate band is used efficiently.

Pros:

• Very affordable
• Simple, clear process
• Long-established UK provider

Cons:

• Less detailed IHT planning prompts than Farewill
• Storage fees after first year
• Limited trust will options

👉 Try Make a Will Online

🥉 3. ActiveWills — Budget-Friendly with Decent Features

Rating: 8.1/10

ActiveWills offers competitive pricing and a clean interface. While its IHT-planning depth doesn’t match Farewill, it covers the essentials — beneficiary selection, property distribution, and backup beneficiaries.

Pros:

• Lowest price in our comparison
• Free storage
• Simple, guided process

Cons:

• No trust wills — not suitable for estates needing trust planning
• Minimal IHT-specific guidance
• Better for straightforward estates under the threshold

👉 Try ActiveWills

Quick Comparison Table

Common Inheritance Tax Will Planning Mistakes to Avoid

1. Leaving Everything to Your Spouse Automatically

It feels natural, but if your combined estate is above £1 million, leaving everything to your spouse “because it’s tax-free” wastes the first-to-die’s nil-rate band. A property trust will or NRB-drafted will preserves that allowance.

2. Not Claiming the Residence Nil-Rate Band

The RNRB is worth up to £175,000 — that’s up to £70,000 in tax. But you only get it if you leave your main home to direct descendants. A will that leaves your home to someone else, or doesn’t specify, loses this allowance entirely.

3. Ignoring the £2 Million Taper

If your estate is above £2 million, the RNRB tapers away by £1 for every £2 over £2 million. By £2.35 million, it’s gone. If you’re in this range, you need a trust will or gifting strategy — not a standard will.

4. Forgetting About Pension and Life Insurance

Many people don’t realise that pensions often fall outside the estate for IHT purposes if nominated correctly, and life insurance written in trust is also outside the estate. Your will should complement, not duplicate, these arrangements.

5. Never Reviewing Your Will

Thresholds are frozen until 2028, but asset values keep rising. A will written in 2018 when your home was worth £400,000 may be inadequate now that it’s worth £550,000. Review every 3–5 years.

Pros and Cons of Online Will Services for IHT Planning

Pros

• Affordable: Online wills start from under £30, compared to £200–£500+ for a solicitor
• Fast: You can complete a will in 15–30 minutes
• Accessible: Available 24/7, from home
• IHT-aware prompts: The best services (especially Farewill) guide you through decisions that affect inheritance tax
• Legally valid: A correctly signed online will is just as legally binding as a solicitor-drafted one

Cons

• Limited for complex estates: For estates above £2 million, blended families, or business assets, a solicitor or tax adviser is essential
• No ongoing advice: Online services don’t provide tailored tax planning — they help you structure a will, not create a full estate plan
• Trust wills may cost more: If you need a trust will, expect to pay more or use a specialist service

When You Should See a Solicitor Instead

Online will services are excellent for most people, but inheritance tax planning has edge cases where professional advice is worth the cost. See a solicitor or tax adviser if:

• Your estate is worth more than £2 million (RNRB taper applies)
• You own a business or business assets (business property relief may apply)
• You have assets overseas
• You’re in a blended family with children from previous relationships
• You want to set up a discretionary trust (these have ongoing tax and admin obligations)
• You’re planning significant lifetime gifts and need a 7-year strategy

FAQ: Inheritance Tax Will Planning

How much inheritance tax will I pay?

You pay 40% on everything above your threshold. For an individual, that’s £325,000 (or up to £500,000 with the RNRB if you leave a home to descendants). For a married couple, it can be up to £1 million. Anything above that is taxed at 40%.

Can a will really reduce my inheritance tax?

Yes. A will determines who receives your assets, which controls how allowances are used. A trust will or NRB-structured will can save up to £130,000 or more for couples, and charitable gifts can reduce the rate from 40% to 36%.

Do I need a trust will for IHT planning?

Not always. If your estate is under the combined threshold (£1 million for couples, £500,000 for individuals with a home to descendants), a standard will using your full allowances may be enough. Trust wills become valuable when your estate exceeds those thresholds.

Is Farewill good for inheritance tax planning?

Farewill is our top-rated service for IHT-aware wills. Their questionnaire includes prompts for charitable giving, property distribution, and backup beneficiaries — all of which affect your IHT bill. For trust wills or very large estates, they offer specialist support.

How much does a will cost for IHT planning?

Online wills range from £29.99 (ActiveWills) to £39.99 (Farewill). Mirror wills cost £49.99–£69.98. If you need a trust will from a solicitor, expect to pay £300–£800+. The online options above are the most cost-effective starting point for most estates.

What is the 7-year rule for gifts?

Gifts made more than 7 years before your death are completely exempt from IHT. Gifts made within 7 years may be taxed on a sliding scale (taper relief). Your will should include backup provisions in case a gift is clawed back.

Is inheritance tax changing in 2026?

The nil-rate band (£325,000) and residence nil-rate band (£175,000) remain frozen until at least April 2028. There are no major changes to the 40% rate. However, frozen thresholds mean more estates are dragged into the IHT net as property values rise.

Start Your Inheritance Tax Will Today

If you’ve read this far, you know that a properly structured will is the most effective, affordable way to reduce your inheritance tax bill. The best time to write your will was years ago — the second best time is today.

Our top recommendation is Farewill, the UK’s highest-rated will writer, with excellent IHT-aware prompts and specialist support for more complex estates.

👉 Write your will with Farewill — #1 rated

Or compare your options:

👉 Make a Will Online | 👉 ActiveWills

This article was last updated in July 2026. Inheritance tax rules and thresholds may change — always check the latest HMRC guidance or consult a professional for your specific circumstances.

Affiliate disclosure: This page contains affiliate links. If you purchase a will through one of these links, we may earn a commission at no additional cost to you. This does not affect our rankings — we recommend Farewill as our top choice based on independent assessment of features, pricing and customer satisfaction. We are required to comply with ASA/CAP regulations on affiliate advertising and we strive to ensure all claims and comparisons are accurate and verifiable.

Legal disclaimer: This website provides information about will writing services. We are not solicitors and do not provide legal advice. Inheritance tax planning can be complex and depends on your individual circumstances. For large or unusual estates, always consult a qualified solicitor or tax adviser.