Joint assessment, separate assessment or separate treatment?

How married couples and civil partners can be taxed, what each option costs, the Home Carer Tax Credit, and the year you marry.

Married couples and civil partners can be taxed in three ways. Joint assessment applies automatically once you tell Revenue you're married, and for most couples it costs the least.

Joint assessment

Your incomes are added together. You share a €4,000 married credit and a 20% band of €53,000, increased by the lower earner's income up to €35,000. Each of you keeps your own employee credit. One of you, the assessable spouse (by default the higher earner), deals with Revenue for both.

Separate assessment

Each of you files and pays your own tax, with credits split between you. Unused credits and band can still be moved to the other spouse at the end of the year. So the total is the same as joint assessment. Apply between 1 October and 31 March of the year it's to apply.

Separate treatment

Each of you is taxed as a single person, with a single band and single credits, and nothing can be transferred. It often costs more when one of you earns much more than the other.

When one of you is at home

One spouse may care at home for a child getting Child Benefit, someone 65 or over, or someone permanently incapacitated. If so, you can claim the Home Carer Tax Credit: €1,950 in 2026, reduced by half the carer's income over €7,200. You can have the credit or the second-earner band increase, not both. With one income of €60,000, the credit cuts the couple's income tax from €7,400.00 to €5,450.00.

The year you marry

In the year of the wedding, you're taxed as single people. After the year ends, you can claim back the difference from joint assessment for the months you were married. The wedding month counts as a full month. A couple earning €48,000 and €24,000 who married in July 2026 would pay €7,200.00 as single people against €6,400.00 jointly. They could reclaim €400.00 (six months' worth).

USC and PRSI

These are always charged on each person's own income. Joint assessment doesn't change them.

Work it out

• Joint, separate or single assessment →
• Married couple's take-home pay →
• Stay at home or keep working? →

Sources

• Revenue: Joint assessment (worked example for 2025) (checked 16/10/2026)
• Revenue: Tax and Duty Manual Part 44-01-01: Income tax treatment of married couples and civil partners (checked 16/10/2026)
• Revenue: Home Carer Tax Credit rates (checked 25/10/2026)
• Revenue: Tax rates, bands and reliefs (checked 25/10/2026)

General information, not tax advice. HeyPenny is not a tax agent.