What is income shifting between spouses?
Answered 17 March 2026
Income Shifting Between Spouses
"Income shifting" between spouses refers to arrangements where one spouse (typically the higher earner) diverts or transfers income to the other spouse (typically a lower or non-taxpayer) in order to reduce the overall household tax liability by taking advantage of the other spouse's lower tax rate or unused allowances.
What the Law Says
The primary legislative weapon against income shifting between spouses is the Settlements legislation in Chapter 5, Part 5 of ITTOIA 2005.
Definition of "settlement": Under ITTOIA 2005 s.620, a "settlement" is defined very broadly and "includes any disposition, trust, covenant, agreement, arrangement or transfer of assets." A person is treated as having made a settlement if they have made or entered into it directly or indirectly, provided funds for it, or made a reciprocal arrangement with another person to do so.
Charge to tax: Under ITTOIA 2005 s.619, income tax is charged on income treated as that of the settlor under s.624 (where the settlor retains an interest). Where income of another person is treated as the settlor's income, it is charged as if it had arisen directly to the settlor.
Settlor retaining an interest (s.624/s.625): Where the settlor has retained an interest in property in a settlement, the income arising is treated as the settlor's income for all tax purposes. A settlor has retained an interest if the property or income may be applied for the benefit of the settlor, a spouse or civil partner.
Jointly held property — the 50/50 rule: Under ITA 2007 s.836, income from property held jointly by married couples and civil partners is treated as beneficially owned in equal shares, meaning it is taxed 50/50 — even if the individuals own the property in unequal shares. This rule can only be disapplied by a declaration on Form 17 under ITA 2007 s.837.
HMRC Guidance / Practice
Purpose of the settlements legislation: The settlements legislation is intended to prevent an individual from gaining a tax advantage by making arrangements which divert their income to another person who is liable at a lower rate of tax or is not liable to income tax at all.
When the legislation applies: Whether the settlements legislation applies depends on the particular facts. If there is a bounteous arrangement which effectively transfers income earned by one person to another, resulting in a reduction in overall tax liability, the arrangement may be challenged. The legislation most commonly applies where individuals seek to divert income to members of their family. A key test is: would the same payments be made to a person who acquired shares or a partnership interest at arm's length? If income is being paid simply because the recipient is the spouse or civil partner of the settlor, the settlements legislation may apply.
Arrangements caught: In general, the settlements legislation can apply where an individual enters into an arrangement to divert income to someone else and tax is saved. Such arrangements must be bounteous, not commercial, not at arm's length, or — in the case of a gift between spouses or civil partners — wholly or substantially a right to income.
Partnership income: The 50/50 rule does not apply to partnership income. If a spouse or civil partner is in a partnership, the allocation of trading or professional income is decided by the partnership agreement. However, HMRC may consider applying the Settlements legislation to income from partnerships involving married couples or civil partners.
Jointly held property exceptions: The 50/50 rule does not apply to: income to which neither individual is beneficially entitled; partnership income; income from the commercial letting of furnished holiday accommodation; income from jointly held shares in a close company; or income where a valid Form 17 declaration has been made.
Summary
In short, income shifting between spouses is the practice of redirecting income from a higher-earning spouse to a lower-earning spouse to reduce the combined tax bill. UK tax law counters this primarily through the Settlements legislation (ITTOIA 2005, Chapter 5, Part 5), which can treat diverted income as still belonging to the original earner, and through the 50/50 rule (ITA 2007 s.836) for jointly held property, which prevents artificial allocation of investment income to the lower-earning spouse.
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
The settlements legislation is intended to prevent an individual from gaining a tax advantage by making arrangements which divert their income to another person who is liable at a lower rate of tax or is not liable to income tax. It applies only where the settlor has retained an interest in the settled property or income (see TSEM4200 onwards). Where the anti-avoidance settlements legislation applies, all income transferred by a settlement (defined in TSEM4100 onwards) is treated as that of the
Part 5 Miscellaneous income Chapter 5 Settlements: amounts treated as income of settlor or family Charge to tax under Chapter 5 Charge to tax under Chapter 5 619 1 Income tax is charged on— a income which is treated as income of a settlor as a result of section 624 (income where settlor retains an interest), b income which is treated as income of a settlor as a result of section 629 (income paid to relevant children of settlor), c capital sums which are treated as income of a settlor as a result
Whether or not the settlements legislation applies to an arrangement depends on the particular facts of the case. It is necessary to look at the arrangement as a whole. If there is a bounteous arrangement which effectively transfers income earned by one person to another resulting in a reduction in overall tax liability the arrangement may be liable to challenge under the settlements legislation. A purely commercial transaction or series of transactions at arms length is outside the meaning of ‘
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
The 50/50 rule does not apply to partnership income. If a spouse or civil partner is in partnership, the allocation of the partnership trading or professional income is decided in the normal way by the partnership agreement. This applies to partnerships between spouses and between civil partners as well as partnerships where others are involved. Note that in certain circumstance we may consider applying the Settlements legislation to income from partnerships involving married couples or civil pa
Where the settlor has retained an interest in property in a settlement, the income arising is treated as the settlor's income for all tax purposes. A settlor has retained an interest if the property or income may be applied for the benefit of the settlor, a spouse or civil partner. In general, the settlements legislation can apply where an individual enters into an arrangement to divert income to someone else and in the process tax is saved. These arrangements must be: bounteous, or not commerci
evant time and so far as material. The legislation is anti-avoidance legislation, intended to prevent a settlor from gaining a tax advantage by diverting income via a settlement to another person who is not liable to tax on the income, or liable to tax at a lower rate. 79. Section 619 treats the relevant income as that of the settlor and provides as follows: 619 Charge to tax under Chapter 5 (1) Income tax is charged on— (a) income which is treated as income of a settlor as a result of section 6