---
title: "What Tax Do We Pay on Interest from a Joint Account? | UK 2026/27"
description: When cash generates interest in a joint account, taxpayers often assume that the primary account holder pays the tax, or that the interest remains untaxed until they withdraw it. In reality, UK tax law applies strict statutory rules to apportion…
url: "https://www.accountingfirms.co.uk/knowledge-bank/what-tax-do-we-pay-on-interest-from-a-joint-account-uk/"
updated: "2026-08-11"
category: The tax basics
---

# What Tax Do We Pay on Interest from a Joint Account? | UK 2026/27

When cash generates interest in a joint account, taxpayers often assume that the primary account holder pays the tax, or that the interest remains untaxed until they withdraw it. In reality, UK tax law applies strict statutory rules to apportion joint interest, and the correct tax treatment depends entirely on your marital status and your individual tax bands.

If you are asking, "what tax do we pay on interest from a joint account?", below is an exhaustive technical guide covering the 2026/27 Income Tax rules, the differing treatment of spouses versus non-spouses, and the available statutory allowances.

## The Receipt Principle: When is Joint Interest Taxable?

You trigger an Income Tax liability the exact moment the bank pays the interest. In the First-tier Tribunal case of *Halpin v HMRC*, the tribunal established that account holders "receive" interest the moment the financial institution credits it to the joint account, placing the funds at their joint disposal.  You cannot defer the [tax liability](https://www.accountingfirms.co.uk/blog/in-with-the-new-basis-period-rules/) by leaving the funds in the account; the tax point crystallises immediately upon the bank crediting the interest.

## Married Couples and Civil Partners: The 50/50 Rule

For spouses and civil partners who live together, Parliament imposes a rigid default position. Under section 836 of the [Income Tax](https://www.accountingfirms.co.uk/blog/disincorporation-some-practicalities/) Act 2007 (ITA 2007), HMRC treats any income arising from jointly held property as belonging to the individuals in equal shares.

Consequently, the bank interest is split 50/50 for tax purposes, regardless of who actually deposited the underlying capital into the account.

### **Displacing the 50/50 Rule (Form 17)**

 If you and your spouse hold the funds in unequal beneficial shares (for example, if one spouse provided 90% of the capital and retains beneficial ownership of it), you can displace the standard 50/50 rule. Section 837 of the ITA 2007 allows you to make a joint declaration of unequal beneficial interests.

To do this, you must submit a Form 17 to HMRC, proving your unequal capital contributions. The declaration only takes effect if you notify HMRC within 60 days of making it, and it only applies to interest arising on or after the date of the declaration.

## Unmarried Joint Account Holders

If you hold a joint account with someone who is not your spouse or civil partner (such as an unmarried partner, a sibling, or a parent), the section 836 50/50 rule does not apply. Instead, tax liability follows the true *beneficial ownership* of the underlying funds.

When UK banks report interest to HMRC, they operate on a legal presumption of joint tenancy and automatically report the interest as split equally between the named account holders.  However, HMRC manuals confirm that this is merely an "administrative necessity" and does not determine the final tax liability.

If one person contributed 100% of the funds to the joint account and there is no evidence that they gifted a share of the capital to the other account holder, the contributing individual remains taxable on 100% of the interest.

> "When informing HMRC of interest credited to account holders, banks and building societies will allocate the interest equally to the persons named on the account on the basis of that presumption. This is an administrative necessity, and is not necessarily indicative of actual beneficial ownership."

## 2026/27 Allowances: PSA and SSR

Once you determine your share of the joint interest, you assess it against your individual tax allowances. Each joint account holder utilises their own distinct allowances.

### **The Personal Savings Allowance (PSA)**

Section 12B of the ITA 2007 grants individuals a nil-rate band for savings income, depending on their wider earnings.  For the 2026/27 tax year, the allowances remain fixed:

- **Basic-rate taxpayers:** £1,000 tax-free interest.
- **Higher-rate taxpayers:** £500 tax-free interest.
- **Additional-rate taxpayers:** Nil allowance.

If your share of the joint interest exceeds your PSA, you pay tax on the excess at your marginal savings rate (20%, 40%, or 45%).

### **The Starting Rate for Savings (SSR)**

Low earners benefit from further relief under section 12A of the ITA 2007. If your non-savings income (such as your salary or pension) falls below £17,570, you qualify for the starting rate for savings, which taxes up to £5,000 of interest at 0%.  Every £1 of non-savings income you earn above your £12,570 Personal Allowance reduces this £5,000 SSR by £1.

## How HMRC Collects the Tax

Banks no longer deduct [basic rate tax](https://www.accountingfirms.co.uk/blog/beware-of-gift-aid-clawback/) at source. Instead, they pay all interest gross and report the figures directly to HMRC annually.

If you owe tax on your share of the joint interest, HMRC will typically collect it by adjusting your PAYE [tax code](https://www.accountingfirms.co.uk/blog/time-to-p45-the-p45/).  They reduce your [personal allowance](https://www.accountingfirms.co.uk/blog/interesting-dividends/) to account for the untaxed interest, meaning your employer or pension provider will deduct the tax dynamically throughout the year.  If you file a [Self-Assessment tax return](https://www.accountingfirms.co.uk/blog/how-to-manage-stress-during-tax-season/), you simply declare your share of the interest on your return, and HMRC calculates the final liability.

## Summary Table: Taxation of Joint Account Interest (2026/27)

| Element / Scenario | Tax Outcome | Statutory Authority / Precedent |
| --- | --- | --- |
| **Timing of Tax Charge** | Interest is taxable when credited to the account. | *Halpin v HMRC* |
| **Spouses / Civil Partners** | Interest is split strictly 50/50 by default. | s. 836 ITA 2007 |
| **Spouses (Unequal Funds)** | Can elect to be taxed on actual share via Form 17. | s. 837 ITA 2007 |
| **Non-Spouses / Unmarried** | Taxed based on actual beneficial ownership of the capital. | HMRC Manual TSEM9932  / TSEM9951 |
| **Personal Savings Allowance** | Basic Rate: £1,000 Higher Rate: £500 Additional Rate: £0 | s. 12B ITA 2007 |
| **Starting Rate for Savings** | Up to £5,000 tax-free if non-savings income is <£17,570. | s. 12A ITA 2007 |
| **Tax Collection Method** | Paid gross; HMRC collects tax via PAYE code adjustments or SA. | HMRC Manual PAYE12060 |

*For completeness, if you intend to shift the [tax burden](https://www.accountingfirms.co.uk/blog/vat-implications-for-cross-border-e-commerce-businesses/) on joint interest by executing a formal declaration of trust over the underlying bank account capital, ensure you review the "Settlements legislation" in Part 5 of the ITTOIA 2005. If a spouse retains the right to access the underlying capital, HMRC will ignore the trust and continue to tax the original contributor.*