Splitting Care Costs Between Siblings in Ireland: A Practical Framework

Why a Written Agreement Matters

Money and care arrangements are the two things that fracture families fastest when a parent needs help. One sibling lives nearby and provides daily hands-on care. Another lives abroad and contributes financially. A third does neither but has opinions about everything. Without a written framework, resentment builds until someone stops answering the group chat.

A family care agreement does not need to be a legal contract. It is a written document — signed by all siblings — that sets out who contributes what, how often, and under what conditions the arrangement changes. The act of writing it down forces conversations that families avoid, and it creates a reference point when someone later claims they never agreed to a particular split.

How to Structure the Financial Split

Families commonly agree how to divide care costs rather than using a single formula. The most common approach is proportional to income or financial capacity, but some families split equally regardless of earnings, and others weight it by proximity (the sibling providing daily hands-on care contributes less financially because they are already contributing time).

Whatever method you choose, document these specifics: the total monthly or quarterly care budget, each sibling's share in euros, the payment schedule (monthly bank transfer is simplest), what happens if a sibling cannot pay one quarter, and the review cycle (every six months is reasonable, or immediately when care needs change significantly).

Include non-financial contributions explicitly. The sibling who drives Mam to every GP appointment, manages the HSE Home Support paperwork, and coordinates with the home care agency is contributing substantially. Failing to acknowledge that in writing is how care arrangements collapse — the local sibling burns out while the one sending €500 a month from London thinks they are doing their fair share.

Tax Implications of Shared Care Costs

Under Section 467 of the Taxes Consolidation Act 1997, each sibling who contributes to private home care costs for a totally incapacitated person can claim tax relief individually, at their own marginal rate. The combined claim across all siblings is capped at €75,000 per year per incapacitated person. The relief is split proportionally based on each person's actual financial contribution — you cannot agree to let one sibling claim the full amount.

Each sibling files their own claim through Revenue's myAccount portal or on Form HK1. Keep bank transfer records, agency invoices, and a copy of the family care agreement as evidence of who paid what. Claims must be filed within four years of the end of the relevant tax year.

If one sibling hires the carer directly (rather than through an agency), that sibling is the legal employer and takes on PAYE, PRSI, and USC obligations. Financial contributions from other siblings toward those costs are still their own Section 467 claims, but only the employing sibling bears the administrative burden. Using a registered home care agency avoids this complexity entirely.

What to Do When Siblings Disagree

If one sibling refuses to contribute financially, bring the issue into the written family care agreement rather than assuming the informal split is enforceable. For any contribution or inheritance arrangement, get the parent's agreement and solicitor advice to formalise it.

Practically, the contributing siblings have two levers. First, transparency: a shared spreadsheet showing the actual monthly costs and who is paying what makes non-contribution visible. Second, fairness: if the non-contributing sibling later expects an equal share of the parent's estate, the care agreement can specify that financial contributions are recorded as advances against inheritance — though this requires the parent's agreement and ideally a solicitor's involvement to formalise.

For cases where siblings simply cannot agree, a neutral third party — a mediator, a social worker, or a Citizens Information advisor — can facilitate a structured conversation. Family Carers Ireland also offers support and guidance for families navigating these dynamics.

The Home Support Scheme Ireland guide includes a Cost-Sharing Worksheet designed for exactly this situation, along with templates for documenting the agreement and tracking contributions across multiple siblings.

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