Saving tax by sharing income with a spouse

Spouses and civil partners can reduce their combined tax by moving savings and investments to whichever of them pays tax at a lower rate or has unused allowances. The move must be a genuine outright gift: the income follows legal and beneficial ownership, joint accounts are taxed 50:50, and HMRC can tax the income back on the giver if strings are attached.

Why does moving savings between spouses save tax at all?

Each spouse is taxed separately in the UK, with their own allowances and bands. For 2026 to 2027 each person has a Personal Allowance of £12,570 and a basic rate band that runs to £50,270 of taxable income. On top of that there are allowances that only apply to particular kinds of income:

• Starting rate for savings. Up to £5,000 of interest can be tax free if your other taxable income (excluding savings and dividends) is below £17,570. Every £1 of other income above the Personal Allowance reduces it by £1.
• Personal Savings Allowance. £1,000 of interest for a basic rate taxpayer, £500 for a higher rate taxpayer and nothing for an additional rate taxpayer.
• Dividend allowance. £500 of dividends each year, with dividends above that taxed at 10.75%, 35.75% or 39.35% in 2026 to 2027 depending on the band they fall in.
• ISA allowance. Each adult can save up to £20,000 in ISAs in 2026 to 2027. An ISA cannot be held jointly, so a couple has two allowances, not one.

Where one spouse is a higher rate taxpayer and the other has little or no income, the same interest or dividends can be taxed at very different rates depending on whose name the money is in. The order in which savings and dividend income use up these allowances is explained in how savings and dividend income stack.

What does the law require for a transfer to work?

Income is taxed on the person beneficially entitled to it. Moving money into a spouse’s name therefore works only if they really own it. The settlements rules in Chapter 5 of Part 5 of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA) treat income from property in which the giver keeps an interest as the giver’s income. Section 626 ITTOIA takes outright gifts between spouses and civil partners out of that rule, but only if:

• the gift carries a right to the whole of the income (Condition A);
• the property is not wholly or substantially a right to income (Condition B); and
• the gift is not subject to conditions, and there are no circumstances in which the property or related property is or may become payable to, or applicable for the benefit of, the giver.

HMRC’s Trusts, Settlements and Estates Manual at TSEM4205 gives the contrast. A spouse who gives a let property outright and keeps no rights over it has made an outright gift, and the rent is the recipient’s income. If the same gift comes with an agreement allowing the giver to require the property back, it is not an outright gift and the rent stays taxable on the giver. TSEM4210 adds that HMRC looks at the whole arrangement, not just one transaction. The company share side of this, including the Arctic Systems case, is covered in settlements legislation and spouse shareholdings.

How are joint accounts and jointly held investments taxed?

Section 836 of the Income Tax Act 2007 (ITA) says that where income arises from property held in the names of spouses or civil partners who live together, they are treated as entitled to the income in equal shares. HMRC’s manual at TSEM9810 confirms that “property” here includes savings accounts and shares, and gov.uk tells account holders that HMRC will split interest on a joint account equally between them.

Two consequences follow. First, it does not matter who paid the money in: interest on a joint account funded entirely by the higher earner is still taxed half on each of them. Second, putting a sole account into joint names moves half the income, not all of it. TSEM9828 shows the 50:50 split applying from the date the account goes into joint names.

The 50:50 rule has exceptions in section 836(3). The one most relevant here is Exception E: dividends on jointly held shares in a close company are taxed according to actual entitlement, not 50:50 (TSEM9822). Listed shares and ordinary bank accounts held jointly fall under the 50:50 rule.

Can a couple choose a different split than 50:50?

Only if the ownership really is unequal. Under section 837 ITA a couple can make a joint declaration of unequal beneficial interests, using Form 17. The declaration must state their shares in both the income and the property, it has effect only if HMRC receives it within 60 days of the date of the declaration, and it applies to income arising on or after that date.

TSEM9850 is blunt: couples “do not have a general option to have income taxed in any way they like”. A declaration is possible only where each spouse is in fact entitled to a share other than 50:50 and their share of the income matches their share of the property. It cannot be made where the couple own the property as beneficial joint tenants, which is how most joint bank accounts operate. In practice, if the aim is to move all of the interest, the cleaner route is usually an outright transfer into the other spouse’s sole name. Form 17 and declarations of trust explains the declaration route in more detail.

Is there capital gains tax when shares or funds are moved?

Usually not at the point of transfer. Section 58 of the Taxation of Chargeable Gains Act 1992 treats a disposal between spouses or civil partners who are living together as made for a consideration that gives neither a gain nor a loss. The recipient takes over the giver’s base cost. That lets a couple move an investment portfolio into the name of the spouse with the lower tax rate before a sale, and use both annual exempt amounts (£3,000 each in 2026 to 2027). How that works on a sale is covered in transfers between spouses and civil partners.

How much can this save in practice?

Illustration only. Sam earns a salary of £60,000 and holds £40,000 in a sole name savings account paying £1,600 of interest a year. Alex has part time earnings of £8,000 and no other income.

	Savings in Sam’s name	Savings given outright to Alex
Allowance available	£500 Personal Savings Allowance (higher rate)	£4,570 of unused Personal Allowance, plus starting rate and Personal Savings Allowance
Interest taxed	£1,100 at 40%	Nil
Tax on the interest	£440	£0

If the money were instead moved into a joint account, half the interest (£800) would remain taxable on Sam, with £500 covered by the Personal Savings Allowance and £300 taxed at 40%, so £120 of tax would still be due. A full outright gift saves more, but Sam then has no legal claim to the money.

What else should a couple weigh up?

• Marriage Allowance. A spouse with income below the Personal Allowance can transfer £1,260 of it to their partner, worth up to £252. gov.uk says the lower earner must normally have income below their Personal Allowance for the couple to benefit, so moving interest to that spouse can reduce or remove the value of a Marriage Allowance claim.
• Living together. Both section 836 and the section 58 capital gains rule depend on the couple living together. Section 1011 ITA (summarised at TSEM9810) treats a married couple as living together unless separated by court order or deed, or in circumstances where the separation is likely to be permanent.
• Control. An outright gift means the recipient can spend, save or leave the money as they wish. A side agreement to hand it back undermines the tax result.
• Dividends. The dividend allowance is only £500, so the bigger gain from moving shares usually comes from the difference between the basic and higher dividend rates.

What mistakes come up most often?

• Assuming a joint account is taxed according to who funded it. It is taxed 50:50 under section 836 unless a valid Form 17 declaration reflects genuinely unequal ownership.
• Sending Form 17 too late. HMRC must receive it within 60 days of the declaration, and it never applies to income that arose before the declaration date.
• Gifting with conditions, or giving shares that carry only a right to income. Either can bring the income back onto the giver under section 624 ITTOIA.
• Forgetting that putting a sole account into joint names moves only half the income.
• Applying the same thinking to children. Income from money a parent gives a minor child is treated differently, and the parental settlement rule is explained in Junior ISAs and tax on children’s savings.

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Related Accountapedia entries

• Joint bank accounts: who pays tax on the interest
• Jointly owned rental property: splitting the income
• Capital gains for unmarried couples
• Adding a partner to your property title: tax effects
• How dividends are taxed for individuals

Sources

• GOV.UK: Income tax rates
• GOV.UK: How much is tax free
• GOV.UK: Tax on dividends
• GOV.UK: Individual savings accounts
• legislation.gov.uk: Act 2005 c. 5, section 626
• GOV.UK: Manual page TSEM4205
• GOV.UK: Manual page TSEM4210
• legislation.gov.uk: Act 2007 c. 3, section 836
• GOV.UK: Manual page TSEM9810
• GOV.UK: Apply tax free interest on savings

Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 19 October 2026. Part of Accountapedia, the Solar Protect guide to UK tax and accounting. This page is general information, not personalised advice.