UK Joint vs Separate Bank Accounts in Marriage (2026/27)
Joint vs separate accounts for married couples 2026/27: how joint interest is taxed, Form 17, Marriage Allowance, survivorship, IHT and cohabitants.
The tax rules here (Income Tax, Capital Gains Tax, Inheritance Tax, Marriage Allowance) apply across the UK, with Scotland's Marriage Allowance limit noted. The property, intestacy and cohabitation law described is for England and Wales; Scotland and Northern Ireland differ.
Joint vs separate: area-by-area comparison
| Area | Joint | Separate |
|---|---|---|
| Tax on interest | HMRC splits interest equally between account holders by default. For a married couple or civil partners living together, an unequal split needs unequal beneficial ownership and a Form 17 declaration. | Each person's interest is set against their own Personal Savings Allowance (£1,000 basic rate, £500 higher rate, £0 additional rate). |
| Marriage Allowance | Not affected by how accounts are held. | Not affected by how accounts are held. |
| On death (Inheritance Tax) | A jointly owned account normally passes to the surviving owner by survivorship, outside the will. The deceased's share still counts in their estate for Inheritance Tax, where a gift to a spouse is normally exempt. | Passes under the will (or intestacy rules). The spouse exemption and transferable nil-rate bands work the same way. |
| Death without a will | Survivorship applies regardless of intestacy. | England and Wales: with children, the spouse or civil partner takes personal possessions, the first £322,000 and half of the rest; with no children, the whole estate. Scotland and Northern Ireland have their own rules. See the intestacy guide. |
| Divorce | How an account is titled does not decide how a court divides assets; take legal advice. | Money in a sole name can still be taken into account by the court on divorce. |
| Day to day | Shared bills and visibility of spending. | Privacy and individual control. |
| Credit files | Joint credit creates a financial association, so one partner's record can affect the other's applications. | No financial association from a sole account. |
The "yours / mine / ours" hybrid model
A common way to combine separate and joint money:
- Each partner keeps their own current account for their pay and personal spending.
- A joint account for shared costs - bills, mortgage or rent, food, children's costs, holidays.
- A regular transfer from each personal account into the joint one - either equal amounts or in proportion to income. If one partner earns twice as much, equal pounds leave the lower earner with less of their own money.
- Joint savings for shared goals. ISAs cannot be held jointly, so each partner uses their own.
- Individual ISAs and pensions - each partner has their own £20,000 ISA allowance and their own pension annual allowance.
Unmarried couples: protecting each other
In England and Wales there is no "common law marriage", and an unmarried partner has no automatic share of the other's estate. Practical steps:
- Wills - the intestacy rules give an unmarried partner nothing.
- How you own a home together - as joint tenants the whole property passes to the survivor; as tenants in common each share passes under that owner's will, and a declaration of trust can record unequal shares.
- Cohabitation agreement - a written record of who owns and pays for what; take legal advice on drafting it.
- Pension nominations - name your partner on each scheme's expression-of-wish form.
- Life cover written in trust for your partner, so the payout does not form part of your estate.
- Lasting Power of Attorney - a partner has no automatic authority to manage your money or decide on your care if you lose capacity; an LPA gives it (GOV.UK).
Related guides
- UK Marriage Allowance Guide - how the £252 saving works.
- Marriage Allowance Calculator - check eligibility + saving.
- UK Inheritance Tax Rules - spouse exemption + transferable bands.
- UK Emergency Fund Target 2026/27 - household emergency planning.
- IHT Couple Calculator - NRB + RNRB transferable mechanics.
Frequently asked questions
Is joint account interest taxed differently from separate?
HMRC splits interest on a joint account equally between the account holders by default, and each person sets their half against their own Personal Savings Allowance and tax band. For a married couple or civil partners living together, income from jointly held property is taxed 50:50 under ITA 2007 s.836 unless they own it in unequal shares and send a Form 17 declaration (s.837). The declaration must reflect the real ownership, takes effect from the date it is signed and must reach HMRC within 60 days, or it has no effect. A new declaration is needed if the shares change.
What is Marriage Allowance and how does it apply?
It lets a spouse or civil partner who does not pay Income Tax, or whose income is below the Personal Allowance, transfer £1,260 of their allowance to a partner who pays basic-rate tax (income usually up to £50,270; in Scotland, starter, basic or intermediate rate, usually up to £43,662). It reduces the partner's tax by up to £252 a year. You can backdate a claim for up to four previous tax years and apply online. It does not depend on whether your accounts are joint or separate.
What happens to joint accounts when one spouse dies?
A jointly owned account normally passes to the surviving owner automatically by survivorship, so it does not pass under the will and the survivor can usually keep using it without waiting for probate. The deceased's share is still part of their estate for Inheritance Tax. Where an account was put in joint names only for convenience (for example a parent adding an adult child to help with bills), who is entitled to the money can be disputed, so record what was intended.
Does the spouse IHT exemption mean we do not need to worry?
Gifts and bequests to a spouse or civil partner are exempt from Inheritance Tax (IHTA 1984 s.18). The exemption is capped at £325,000 where the giver is a long-term UK resident and the spouse is not (s.18(2)). Any unused nil-rate band (£325,000) and residence nil-rate band (up to £175,000, where a home passes to children or grandchildren) can transfer to the survivor, so a couple can pass on up to £1,000,000 free of Inheritance Tax if the conditions are met. The residence band tapers away for estates over £2,000,000. Unmarried partners get no spouse exemption.
What is the "yours / mine / ours" hybrid model?
Each partner keeps their own account for their pay and personal spending, and both pay into a joint account for shared bills, the mortgage or rent, and household savings. Some couples pay in equal amounts, others in proportion to income. It keeps some independence while sharing household costs; the trade-off is an extra account and agreeing how much each puts in.
What about cohabiting (unmarried) couples?
Unmarried partners do not get the Inheritance Tax spouse exemption or Marriage Allowance, and in England and Wales there is no "common law marriage" and an unmarried partner inherits nothing under the intestacy rules. In Scotland a surviving cohabitant can apply to the court for provision from an intestate estate (Family Law (Scotland) Act 2006 s.29). In practice, couples protect each other with wills, a declaration of trust for a jointly owned home, pension nominations, life cover written in trust and lasting powers of attorney. Take legal advice on a cohabitation agreement.
Should we keep separate credit files for protection?
Joint credit (a joint mortgage, loan or account with an overdraft) creates a financial association on both credit files, so one partner's record can affect the other's applications. A sole account or card keeps some credit history in your own name. Joint mortgage debt usually stays joint until it is repaid or refinanced.
What about gifting between spouses for tax planning?
Gifts between spouses or civil partners are normally exempt from Inheritance Tax (subject to the £325,000 cap above), and for Capital Gains Tax a transfer between spouses living together is treated as no gain, no loss (TCGA 1992 s.58). So couples can move income-producing assets to the partner with unused allowances or a lower tax rate. For Income Tax this only works if the gift is outright: it must carry the right to the whole of the income and must not be wholly or substantially a right to income (ITTOIA 2005 s.626), otherwise the income stays taxable on the giver. Each partner has their own £20,000 ISA allowance and their own £60,000 pension annual allowance, with relief limited to their own relevant earnings.