Glossary · UK
What is Form 17 (Property Income Declaration)?
The HMRC form used by married couples or civil partners to declare that rental income from jointly-owned property is split in proportions other than the default 50/50.
Full Definition
When married couples or civil partners own rental property jointly, HMRC's default rule (under Section 836 ITTOIA 2005) is to split the rental income 50/50 between them for tax purposes, regardless of the actual beneficial ownership split. If the couple owns the property in unequal beneficial shares and wishes to be taxed according to those actual shares, they must submit Form 17 (Declaration of beneficial interests in joint property and income) to HMRC. The form must be accompanied by evidence of the actual beneficial ownership -- typically a Declaration of Trust or a Deed of Trust clearly stating the respective ownership percentages. The election takes effect from the date HMRC receives the Form 17 (not retrospectively), and both partners must submit the form. A Form 17 election is only available to married couples and civil partners; unmarried cohabiting couples are already taxed on their actual beneficial shares without needing a declaration. The main tax planning motivation is to allocate more of the rental profit to the lower-earning spouse, reducing the household's combined Income Tax bill -- for example, directing income to a basic-rate taxpayer rather than an additional-rate taxpayer. The election remains in force indefinitely unless the beneficial ownership changes, at which point it must be reviewed and the process repeated if appropriate.