Which year’s taxes does the credit for household expenses affect?

You can claim tax credit for household expenses per calendar year.

The credit is deducted from the taxes of the year when you paid the company’s invoice or the wages and employer’s contributions for your employee. For example, if you order renovation work at the turn of the year and you pay invoices for the work during two different calendar years, you can claim the tax credit for both years. However, you will also have to pay the credit threshold amount twice.