General relief
You can generally claim tax relief on qualifying health expenses that you actually paid. The expenses can relate to you, a family member or another individual, provided you bore the cost.
Reimbursements must be deducted
You cannot claim relief on amounts already reimbursed, or expected to be reimbursed, by insurance, the HSE, another public authority or another source. Enter the net unreimbursed cost rather than the original invoice amount.
Which year?
Revenue permits some flexibility where treatment and payment fall in different years. Depending on the facts, the claim can be made by reference to the year of treatment or split by the year the cost was paid, as Revenue's guidance explains.
Keep records
Revenue requires original receipts to be retained for six years in case a claim is checked. You generally do not need to submit the receipts when making the claim online.