How do I account for property jointly owned with a spouse?
Answered 11 March 2026
Here is a comprehensive answer on how to account for property jointly owned with a spouse, focusing on income tax (the most common context for this question):
What the law says
The default 50/50 rule (ITA 2007, s.836)
Where income arises from property held in the joint names of a married couple or civil partners who are living together, both individuals are treated for income tax purposes as beneficially entitled to equal (50/50) shares of the income — regardless of their actual beneficial ownership.
This rule applies even if the property is owned in unequal shares.
Opting for an unequal split (ITA 2007, s.837 — "Form 17")
A couple may make a joint declaration to be taxed on their actual (unequal) entitlement if:
- one of them is beneficially entitled to the income to the exclusion of the other, or
- they are beneficially entitled to the income in unequal shares, and
- their beneficial interests in the income correspond to their beneficial interests in the property.
The declaration must:
- State the beneficial interests in both the income and the property.
- Be notified to HMRC within 60 days of the date of the declaration.
- It takes effect from the date of the declaration onwards and continues until there is a change in beneficial interests.
Important limitation: A Form 17 declaration cannot be made where the couple own the property as beneficial joint tenants (as opposed to tenants in common), because joint tenants do not own the property in defined shares.
HMRC guidance / practice
Default position — 50/50
HMRC confirms there are two rules: the 50/50 rule (ITA/S836) and the Form 17 rule (ITA/S837). In the absence of a valid Form 17 declaration, the 50/50 split applies.
A couple does not have to opt for a different split. Even if one spouse holds 90% of the capital and income, they can accept the standard 50/50 basis.
Making a Form 17 declaration
- The declaration must be made jointly — if one spouse does not want to make it, both must accept the 50/50 split.
- The couple should submit evidence of beneficial ownership (e.g. a valid declaration of trust) alongside the Form 17.
- A Form 17 declaration can only be made if the split is other than 50/50 (e.g. 100/0, 60/40).
- A couple can make a different choice for each asset and do not have to make a declaration as soon as they acquire a new asset.
Furnished Holiday Lettings (FHL) — post April 2025
From 6 April 2025, the FHL exception to the 50/50 rule has been withdrawn. The 50/50 default now applies to FHL income, and any change requires a Form 17 declaration under s.837 ITA 2007.
Reporting your share
Each spouse must include their own share of the income in their own tax return. They are personally responsible for this even if they agree that one person will keep the records.
Summary table
| Situation | Tax treatment |
|---|---|
| Joint property, no Form 17 | 50/50 split regardless of actual ownership |
| Joint property, unequal beneficial interests, Form 17 filed within 60 days | Split matches actual beneficial interests |
| Beneficial joint tenants (no defined shares) | Cannot use Form 17; 50/50 applies |
| Separated spouses | 50/50 rule does not apply; taxed on actual entitlement |
Citation sources
There are two rules about property held jointly by married couples and civil partners: the ‘50/50 rule’ (ITA/S836) whereby most income from jointly held property is treated as split equally between the two spouses or civil partners for income tax purposes; the 50/50 rule applies unless there is a valid declaration on form 17; sections TSEM9814-9840 contain the details; the ‘form 17 rule’, whereby, if the true income split is different from 50/50, the couple can opt to be taxed on that basis for
Where property is owned jointly by one or more people and rental income is received jointly (see PIM1030) the way the income is taxed depends on whether the letting is carried on in partnership. Joint letting does not, of itself, make the activity a partnership. Usually, there will not be a partnership and the individual’s share from the jointly owned property will be included as part of their personal property business profits. Less commonly, the joint letting may amount to a partnership. If th
A couple do not have to opt for a different split. A couple could accept the standard 50/50 split for jointly held property, even if one spouse or civil partner holds 90% of the capital and income and the other spouse or civil partner holds 10%. A couple can make a different choice for each asset. In some cases they can choose to be taxed on their actual entitlement; in others they can accept the standard 50/50 basis. The couple do not have to make a declaration as soon as they get a new asset.
Part 14 Income tax liability: miscellaneous rules Chapter 3 Jointly held property Jointly held property 836 1 This section applies if income arises from property held in the names of individuals— a who are married to, or are civil partners of, each other, and b who live together. 2 The individuals are treated for income tax purposes as beneficially entitled to the income in equal shares. 3 But this treatment does not apply in relation to any income within any of the following exceptions. Excepti
ITA/S837 refers to ‘unequal beneficial interests’. A form 17 declaration must correctly state the individuals’ beneficial interests in the jointly held property and the income arising from the property A form 17 declaration can be made only if the individuals are beneficially entitled to the income in unequal shares. This could be 100/0 or 60/40 or anything other than 50/50.
Up to 5 April 2025, the 50/50 rule does not apply to income arising from a UK property business which consists of, or so far as it includes, the commercial letting of furnished holiday accommodation. 1. If a spouse or civil partner carries on the activity alone: that spouse or civil partner is taxable on the income. 2. If a spouse or civil partner carries on the activity with others: the income is split for tax purposes in the way the parties have agreed to split the profits amongst themselves.
Part 14 Income tax liability: miscellaneous rules Chapter 3 Jointly held property Jointly held property: declarations of unequal beneficial interests 837 1 The individuals may make a joint declaration under this section if— a one of them is beneficially entitled to the income to the exclusion of the other, or b they are beneficially entitled to the income in unequal shares, and their beneficial interests in the income correspond to their beneficial interests in the property from which it arises.
Where married couples or civil partners elect not to be taxed 50/50, the normal rules of beneficial ownership apply. The starting point is that the jointly held property is presumed to be held as joint tenants (TSEM9230). As TSEM9230 says, there are various ways this presumption can be displaced by evidence to the contrary - for example, a valid declaration of trust in equal or unequal shares. However, if the shares are equal there would be no possibility of a joint declaration on form 17 for ta
Income from property held jointly by married couples and civil partners is treated as beneficially owned by the individuals in equal shares under ITA/S836. Consequently they are taxable on the income 50/50. This rule applies even if the individuals own the property in unequal shares. It can be disapplied only by a declaration on form 17 under ITA/S837. Full details of how the 50/50 rule operates in practice are given at TSEM9828-9840. There are some specific exclusions from the 50/50 rule about
Married couples and civil partners can, in certain circumstances, ask to be taxed on their actual entitlement to income from jointly held property. They do this by making a joint declaration of unequal beneficial interests and submitting it to HMRC. A valid declaration under ITA/S837 overrides the 50/50 rule in ITA/S836. In the absence of a valid form 17 declaration, the 50/50 rule applies. The declaration must be made on form 17. A form 17 declaration must be made jointly. If one spouse or civi
Married couples and civil partners do not have a general option to have income taxed in any way they like. They can depart from the standard 50/50 split for tax purposes only where each spouse or civil partner is in fact entitled to a share other than 50/50 in the property and the share that a spouse or civil partner has in the income is the same as their share in the property A declaration cannot be made where a husband and wife or civil partners own property as beneficial joint tenants. In the