Inheritance tax—formally known as Capital Acquisitions Tax (CAT)—catches many Irish families off guard. With a flat rate of 33% and relatively modest tax-free thresholds, proper planning isn't optional; it's essential. Whether you're inheriting a family home, receiving a substantial gift, or planning your own estate, understanding how CAT works can save your beneficiaries tens of thousands of euros.

This comprehensive guide breaks down everything you need to know about Irish inheritance tax in 2026: current rates, thresholds, exemptions, and proven strategies to minimise your tax liability legally and effectively.

What Is Capital Acquisitions Tax (CAT)?

Capital Acquisitions Tax is the Irish tax applied to gifts and inheritances. Unlike some countries that tax the estate before distribution, Ireland taxes the recipient (the beneficiary) based on what they receive. The tax applies to the market value of assets received since 5 December 1991, calculated on a cumulative lifetime basis.

CAT covers two main scenarios:

• Inheritances: Assets received after someone's death
• Gifts: Assets received during the donor's lifetime (with some exemptions)

The critical point: all gifts and inheritances you receive from the same group of people are added together over your lifetime to determine your tax liability.

Current CAT Rate for 2026

The CAT rate remains unchanged at 33% for 2026. This rate applies to the taxable value of gifts or inheritances that exceed your tax-free threshold. Budget 2026 made no adjustments to this rate, maintaining the level that has been in place for several years.

Example: If you inherit €450,000 from your parents and have no prior gifts or inheritances, you'd pay 33% on the amount exceeding the Group A threshold of €400,000—that's €50,000 taxable, resulting in €16,500 in CAT.

CAT Thresholds 2026: Group A, B, and C Explained

The tax-free threshold you qualify for depends on your relationship to the person giving you the gift or inheritance. Ireland divides these relationships into three groups, each with a different lifetime threshold:

Group A: €400,000 (Parent to Child)

Group A applies when you receive gifts or inheritances from:

• Your parents
• Your stepparents (in certain circumstances)
• Your grandparents (if your parent is deceased and you took their place in succession)

This is the most generous threshold, reflecting the typical parent-to-child wealth transfer. The €400,000 limit is lifetime and cumulative—every gift and inheritance from parents throughout your life counts toward this total.

Group B: €40,000 (Siblings, Nieces, Nephews, Grandchildren)

Group B covers gifts and inheritances from:

• Your siblings (brothers and sisters)
• Nieces and nephews
• Grandchildren
• Grandparents (in most cases)
• Aunts and uncles

At just €40,000, this threshold can be quickly exceeded, particularly with property inheritances. Many beneficiaries in this category face substantial tax bills without proper planning.

Group C: €20,000 (All Other Relationships)

Group C is the default category for:

• Cousins
• Friends
• Unmarried partners (unless certain conditions apply)
• Any other person not covered by Groups A or B

The €20,000 threshold means that even modest inheritances can trigger significant tax liabilities. For example, inheriting €120,000 from a friend would result in €100,000 being taxable at 33%, creating a €33,000 tax bill.

Key CAT Exemptions in 2026

Irish tax law provides several important exemptions that can reduce or eliminate CAT liability when properly applied:

Spouse and Civil Partner Exemption

The most significant exemption: all transfers between spouses or registered civil partners are completely tax-free, with no upper limit. This unlimited exemption means married couples can inherit from each other without any CAT implications.

This creates a common estate planning strategy: leaving everything to the surviving spouse first, who can then plan onwards distributions to children or other beneficiaries more tax-efficiently.

Small Gift Exemption: €3,000 Per Year

Each person can give up to €3,000 per year to any individual completely tax-free. Critically, this exemption:

• Doesn't count toward lifetime thresholds
• Can be used every year without limit
• Can be given to multiple people (e.g., each of your children)
• Can be received from multiple people in the same year

Planning opportunity: Two parents can each give €3,000 to each child annually—that's €6,000 per child per year, or €108,000 over 18 years, completely outside the CAT system.

Dwelling House Relief

Perhaps the most valuable relief for many families, the Dwelling House Relief provides complete exemption from CAT when inheriting a home—but only if all five conditions are met:

1. 3-year residence requirement (before): You must have lived in the house as your only or main home for the 3 years immediately before the inheritance
2. 6-year residence requirement (after): You must continue living in the house as your main residence for 6 years after inheriting it
3. No other property ownership: You cannot own or have a beneficial interest in any other residential property when you inherit
4. Disponer's main residence: The house must have been the deceased's only or main home (or they were absent due to ill health/care needs)
5. First-time claim: You cannot have previously claimed this relief for another property

These conditions are strictly enforced by Revenue. Failing on any single condition means losing the entire exemption and potentially facing CAT on the full market value of the property.

Common pitfall: Many adult children living in the family home don't realise they may technically have an interest in another property (perhaps bought years ago, or co-owned with a spouse), which disqualifies them from Dwelling House Relief.

How to Minimise Inheritance Tax Through Will Planning

Strategic estate planning can legally and significantly reduce CAT liability for your beneficiaries. Here are the most effective approaches:

1. Maximise Annual Gift Exemptions

Start gifting early using the €3,000 annual exemption. Over time, this can transfer substantial wealth outside the CAT system entirely. For example:

• Two parents gifting to two children: €12,000 per year
• Over 20 years: €240,000 transferred tax-free
• None of this counts toward the €400,000 Group A threshold

2. Use Section 72 Life Assurance Policies

Section 72 insurance policies are specifically designed to pay CAT bills. When structured correctly (typically as a joint policy on the lives of both parents, written in trust for beneficiaries), the payout is exempt from CAT and provides funds to cover inheritance tax on other assets.

This ensures beneficiaries aren't forced to sell inherited assets (like the family home or business) to pay the tax bill.

3. Properly Structure Asset Ownership

How you hold assets matters enormously:

• Joint ownership with children: Transferring property into joint names can reduce future CAT, but triggers other taxes (stamp duty, capital gains tax) and creates legal complexities
• Bare trusts for minors: Allows grandparents or others to gift assets that are managed until the child reaches majority
• Family partnerships: For business or investment assets, family partnerships can shift future growth to children while parents retain control

4. Claim Business and Agricultural Relief

Qualifying business assets and agricultural property benefit from a 90% reduction in value for CAT purposes. This can save enormous sums on family businesses and farms, but strict conditions apply:

• The business must be actively trading (not passive investments)
• Agricultural property must meet farming use requirements
• The beneficiary must retain the assets for six years

5. Time Your Gifts Strategically

Unlike the UK's 7-year rule, Ireland's CAT applies immediately to gifts. However, strategic timing still matters:

• Spread larger gifts across multiple years to use annual exemptions
• Consider giving assets likely to appreciate significantly (future growth accrues to the recipient, outside your estate)
• Review thresholds after each Budget—if increases are announced, accelerate planned transfers

6. Draft a Tax-Efficient Will

Your will's structure directly impacts CAT liability. Key strategies include:

• Spouse exemption first: Leave everything to your spouse tax-free, then they can distribute onwards
• Equalisation: Balance distributions to keep beneficiaries under thresholds where possible
• Residency conditions: If planning to use Dwelling House Relief, ensure your will's terms don't inadvertently breach the conditions
• Charitable bequests: Gifts to qualifying charities are CAT-exempt and can reduce the taxable estate

Common Inheritance Tax Planning Mistakes to Avoid

Even well-intentioned estate planning can backfire without proper guidance. Watch out for these frequent errors:

1. Leaving It Too Late

The single biggest mistake is delaying estate planning until ill health or advanced age. Effective CAT planning requires years of strategic gifting and structuring. Start early—ideally in your 50s or when your estate begins to grow substantially.

2. Ignoring Tax Interactions

CAT doesn't exist in isolation. Transferring assets can trigger:

• Capital Gains Tax (CGT): Gifting assets during your lifetime may create a CGT liability for you (33% rate)
• Stamp Duty: Property transfers attract 1-2% stamp duty in many cases
• Income Tax: Some trust structures create ongoing income tax obligations

Proper planning coordinates all tax implications, not just CAT in isolation.

3. Overlooking the Small Gift Exemption

Many families miss the €3,000 annual exemption entirely. Over a lifetime, this represents hundreds of thousands in lost tax-free transfers. Even if you can't afford to gift the maximum each year, using this exemption partially is better than not using it at all.

4. Assuming Dwelling House Relief Automatically Applies

Just because a child lived in the family home doesn't mean they'll qualify for Dwelling House Relief. Many discover too late that they failed one of the five strict conditions—often the "no other property interest" requirement or the 6-year retention period.

Document compliance carefully and seek professional advice before relying on this relief.

5. DIY Will Writing for Complex Estates

While simple wills can be drafted without professional help, estates exceeding CAT thresholds or involving property, businesses, or multiple beneficiaries require expert structuring. The cost of professional will writing and tax planning is minimal compared to the CAT savings for your beneficiaries.

6. Failing to Update Your Will Regularly

Tax laws change, family circumstances evolve, and asset values fluctuate. A will written ten years ago may no longer be tax-efficient—or even reflect your current wishes. Review your will every 3-5 years or after major life events (marriage, children, significant asset acquisition).

7. Not Communicating Plans to Beneficiaries

Beneficiaries can inadvertently destroy tax planning if they don't understand the structure. For example, selling the family home within six years destroys Dwelling House Relief. While family discussions about death and inheritance are uncomfortable, they're essential for effective planning.

Filing and Payment: Your CAT Obligations

Understanding your compliance obligations helps avoid penalties and interest:

When You Must File

You must file a CAT return (Form IT38) if your total benefits from any group exceed 80% of the relevant threshold—even if you owe no tax. For 2026, this means filing is required if you receive:

• More than €320,000 from Group A relationships
• More than €32,000 from Group B relationships
• More than €16,000 from Group C relationships

Filing Deadline

You must file your CAT return by 31 October in the year following the valuation date. For example, if you inherit property on 15 March 2026, your return is due by 31 October 2027.

Payment Deadline

CAT must be paid within four months of receiving the benefit, though Revenue typically allows payment when filing if you file on time.

Penalties for Late Filing

Late filing or payment attracts:

• Interest on late payments (currently 8% per annum)
• Surcharges for late returns (up to 10% of the tax due)
• Potential Revenue audits and investigations

How MakeAWill.ie Can Help You Plan for CAT

Inheritance tax doesn't have to devastate your family's wealth transfer. With proper planning, clear understanding of the rules, and professional guidance, you can structure your estate to minimise CAT legally and effectively.

At MakeAWill.ie, we specialise in tax-efficient will writing that protects your beneficiaries from unnecessary tax burdens. Our comprehensive service includes:

• Analysis of your estate's potential CAT liability
• Identification of available exemptions and reliefs specific to your circumstances
• Strategic will structuring to maximise tax efficiency
• Guidance on lifetime gifting strategies
• Coordination with your solicitor and accountant for complex estates
• Regular reviews to keep your will current with tax law changes

The cost of proper planning is a fraction of the CAT your beneficiaries would otherwise pay. More importantly, it provides peace of mind that your estate will pass to your loved ones as you intend, with the maximum possible value preserved.