How do you tax interest? What is the personal savings allowance?

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This is a freeview 'At a glance' guide to the taxation of savings income.

Savings income is interest earned, typically on a cash balance, whether paid to you by a bank, building society or any other source.

At a glance

  • There is both a tax-free savings band (the starting rate band for savings) and a tax-free personal savings allowance.
  • Banks and building societies (since 6 April 2016) generally pay savings income gross (without tax being deducted). 
  • If you have lent cash to your own company it will pay interest net of a deduction of 20% tax:
  • Savings income from qualifying ISAs is tax-free.

The Starting Rate Band (SRB)

When savings income falls in the £5,000 SRB, it is taxable at the savings rate (0%).

The scale of the SRB is subject to levels of other income (excluding dividend income): it is not always £5,000. The more non-savings income an individual has (e.g. wages/pension), the less the SRB will be. 

  • Every £1 of other income above the personal allowance (£12,570) reduces the SRB by £1.
  • The savings band is not available if other income exceeds the sum of the personal allowance and the savings band (£17,570)

The Personal Savings Allowance (PSA)

The PSA applies even if you do not qualify for the SRB. 

From 2016-17, the PSA effectively exempts savings income within the allowance for basic and higher rate taxpayers. The allowance is £1,000, reduced to £500 for higher rate taxpayers and £0 for additional rate taxpayers, meaning that:

  • Basic rate taxpayers do not have to pay tax on the first £1,000 of their savings income.
  • Higher rate taxpayers do not have to pay tax on the first £500 of their savings income.
  • Additional rate taxpayers are fully taxable on their savings income.

Bands and allowances

Year Savings rate SRB PSA

2016-17 onwards

0% £5,000

£1,000 basic rate taxpayers

£500 higher rate taxpayers

2015-16 0% £5,000 n/a
2014-15 10% £2,880 n/a

How does this work?

2023-24

  • Jess earns £12,570 in employment income. Last year she sold her house and she earned £6,000 in interest on the proceeds which are still sitting in the bank.
  • Her tax-free personal allowance is £12,570 for the year.

2024-25

  • Jess has a new job and earns £15,570 this year. Her money was in savings for part of the year and she earned £4,000 in interest.
  • Her personal allowance was £12,570 for the year.

2025-26

  • Jess started a second part-time job and now earns £21,570 a year. Her money was in savings for part of the year and she earned £4,500 in interest.
  • Her personal allowance was £12,570 for the year.

Jess's tax

Step 1: how much of the SRB is potentially available?

Year

2023-24

2024-25

2025-26

Non-savings income 12,570 15,570 21,570
Less: personal allowance  (12,570) (12,570) (12,570)
Amount to reduce SRB - 3,000 5,000
SRB before reduction 5,000 5,000 5,000
SRB available 5,000 2,000 0

Step 2: calculate the tax due

2023-24

Income

£

Personal allowance

£

SRB

£

Taxable

£

Non-savings 12,570 (12,570) -  -
Savings 6,000  - (5,000) 1,000
Tax rates        
0% on       1,000
Tax due       nil

 

 2024-25

 Income

£

Personal allowance

£

SRB

£

Taxable non-savings

£

Taxable savings

£

Total

£

Non-savings 15,570 (12,570) -  3,000   3,000
Savings 4,000  - (2,000)   2,000 2,000
Total 19,570 (12,570) (2,000) 3,000 2,000 5,000
Tax calculation:            
0% tax on         1,000 (PSA)  
20% tax on        3,000 1,000  
 Tax due        600 200 800

 

 2025-26

 Income

£

Personal allowance

£

SRB

£

Taxable non-savings

£

Taxable savings

£

Total

£

Non-savings 21,570 (12,570) - 9,000   9,000
Savings 4,500  - -   4,500 4,500
Total 26,070 (12,570) - 9,000 4,500 13,500
Tax calculation:            
0% tax on         1,000 (PSA)  
20% tax on        9,000 3,500  
 Tax due       1,800 700 2,500

For further worked examples including the interaction with the dividend allowance, and examples covering all rates of taxpayer see Savings income: How interest is taxed.