If you’re not sure about the interest rate on your current Cash ISA, don’t worry, as we’ve outlined the different interest rates below depending on when you opened your account.
*The bonus rate is not applicable for funds transferred in from other providers, unless specifically stated in the Bonus rate field below.
If the Bonus rate field does not specify a rate for transfers in, any funds you transfer in will only earn the basic rate.*
If your Cash ISA account is open for less than 12 months, please check the table below.
If you opened your cash ISA more than 12 months ago, scroll down to the next table.
Date your Cash ISA was opened | Total rate (Basic plus bonus rate) - AER (variable) | Basic Rate - AER (variable) | Bonus rate - AER (variable) | Bonus Rate Period |
From 7 March 2025 to 13 March 2025 | 3.78% | 2.54% | 1.24% | 12 months |
From 14 March 2025 to 17 March 2025 | 3.81% | 2.54% | 1.27% | 12 months |
From 18 March 2025 to 20 March 2025 | 4.02% | 2.54% | 1.48% | 12 months |
From 21 March 2025 to 27 March 2025 | 4.04% | 2.54% | 1.50% | 12 months |
From 28 March 2025 to 31 March 2025 | 4.36% for the first 3 months, 3.74% for the following 9 months | 2.54% | 1.82% | 3 months, then 1.20% for 9 months. |
From 1 April 2025 to 3 April 2025 | 4.60% for the first 3 months, 3.74% for following 9 months | 2.54% | 2.06% | 3 months, then 1.20% for 9 months. |
From 4 April 2025 to 10 April 2025 | 4.92% for the first 3 months, 3.74% for following 9 months | 2.54% | 2.38% | 3 months, then 1.20% for 9 months. |
From 11 April 2025 to 16 April 2025 | 4.68% for the first 3 months, 3.74% for following 9 months | 2.54% | 2.14% | 3 months, then 1.20% for 9 months. |
From 17 April 2025 to 21 April 2025 | 4.04% | 2.54% | 1.50% | 12 months |
From 22 April 2025 to 14 May 2025 | 4.06% | 2.54% | 1.52% | 12 months |
From 15 May 2025 to 19 May 2025 | 4.10% | 2.54% | 1.56% | 12 months |
From 20 May 2025 to 22 May 2025 | 4.20% | 2.54% | 1.66% | 12 months |
From 23 May 2025 to 1 June 2025 | 4.23% | 2.54% | 1.69% | 12 months |
From 2 June 2025 to 23 June 2025 | 4.10% | 2.54% | 1.56% | 12 months |
From 24 June 2025 to 30 June 2025 | 4.17% | 2.54% | 1.63% | 12 months |
From 1 July 2025 to 2 July 2025 | 4.20% | 2.54% | 1.66% | 12 months |
From 3 July 2025 to 23 July 2025 | 4.23% | 2.54% | 1.69% | 12 months |
From 24 July 2025 to 28 July 2025 | 4.01% | 2.54% | 1.47% | 12 months |
From 29 July 2025 to 5 August 2025 | 4.11% | 2.54% | 1.57% | 12 months |
From 6 August 2025 to 28 August 2025 | 3.91% | 2.54% | 1.37% | 12 months |
From 28 August 2025 to 9 September 2025 | 3.85% | 2.54% | 1.31% | 12 months |
From 10 September 2025 to 13 October 2025 | 3.87% | 2.54% | 1.33% | 12 months |
From 14 October 2025 to 26 November 2025 | 3.95% | 2.54% | 1.41% | 12 months |
From 30 October 2025 to 26 November 2025 | 3.95% | 2.54% | Bonus interest for deposited funds: 1.41% | 12 months |
From 27 November 2025 to 7 December 2025 | 4.24% | 2.54% | Bonus interest for deposited funds: 1.70% | 12 months |
From 8 December 2025 to 22 December 2025 | 4.03% | 2.54% | Bonus interest for deposited funds: 1.49% | 12 months |
From 23 December 2025 to 28 December 2025 | 4.12% | 2.54% | 1.58% | 12 months |
From 29 December 2025 to 7 January 2026 | 4.27% | 2.54% | 1.73% | 12 months |
From 8 January 2026 to 26 January 2026 | 4.32% | 2.54% | 1.78% | 12 months |
From 27 January 2026 to 3 February 2026 | 4.36% | 2.54% | 1.82% | 12 months |
From 4 February 2026 to 4 February 2026 | 4.20% | 2.54% | 1.66% | 12 months |
From 4 February 2026 to 17 February 2026 | 4.30% | 2.54% | 1.76% | 12 months |
From 17 February 2026 to 17 February 2026 | Total interest for deposited funds: 4.30% | 2.54% | Bonus interest for deposited funds: 1.76% | 12 months |
From 18 February 2026 to February 24 2026 | Total interest for deposited funds: 4.38% | 2.54% | Bonus interest for deposited funds: 1.84% | 12 months |
From 25 February 2026 to 3 March 2026 | Total interest for deposited funds: 4.42% | 2.54% | Bonus interest for deposited funds: 1.88% | 12 months |
From 4 March 2026 to 4 March 2026 | Total interest for deposited funds: 4.50% | 2.54% | Bonus interest for deposited funds: 1.96% | 12 months |
From 4 March 2026 | Total interest for deposited funds: 4.53% | 2.54% | Bonus interest for deposited funds: 1.99% | 12 months |
*For more details about how the Plum Cash ISA interest rate works, you can check our website page and the relevant articles here and here.
Current Interest Rates for Customers who've held the Cash ISA for more than one year
Date when your Plum Cash ISA entered into its second year | Total rate (Basic rate plus bonus rate) - AER (variable) | Basic Underlying Rate - AER (variable) | Bonus rate AER (variable) | Bonus rate period |
From 14 March 2025 to 31 March 2025 | 2.90% | 2.54% | 0.36% | 12 months |
From 1 April 2025 to 31 October 2025 | 3.00% | 2.54% | 0.46% | 12 months |
From 1 November 2025 | 2.70% | 2.54% | 0.16% | 12 months |
Date your Cash ISA was opened | Bonus rate - AER (variable) that was applicable during first Bonus Rate Period | Bonus Rate Period |
From 14 Mar 2024 to 25 Nov 2024 | 0.88% | 12 months |
From 26 Nov 2024 to 16 Dec 2024 | 1.39% | 12 months |
From 17 Dec 2024 to 06 Jan 2025 | 1.14% | 12 months |
From 07 Jan 2025 to 16 Jan 2025 | 1.22% | 12 months |
From 17 Jan 2025 to 23 Jan 2025 | 1.27% | 12 months |
From 24 Jan 2025 to 6 Feb 2025 | 1.22% | 12 months |
From 7 Feb 2025 to 16 Feb 2025 | 1.28% | 12 months |
From 17 Feb 2025 to 2 March 2025 | 1.51% | 12 months |
From 3 March 2025 to 6 March 2025 | 1.22% | 12 months |