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YES

As of 13 August 2026, AI can compare UK savings rates after tax.

This still needs a person who signs their name to it.

Can you do it?

5 minutesto a draft.

30 minutesto something you’d act on.

Cost, all in£0

Skill neededchat-fluent

Who has to check ityou

What the alternative costsNo priced alternative is provided in the available tool data.

If this goes wrong: you choose an account because its after-tax return was overstated, and the lost interest may not be recoverable.

What to actually do

  1. Hand it to a person

    The route this page recommends

    A person who owns the outcome does this end to end, worth it when the failure is dear.

  2. Use a tool built for this

    Second choice

  3. Do it yourself

    The distant third

    A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

    How to actually do it

    1. Open the provider pages for each savings account and copy the current quoted rate, whether it is AER or another rate, account type, access conditions, introductory terms and eligibility requirements.
    2. Write down the amount you would save, when you would deposit it, how long you expect to keep it there and whether the interest is paid into the account or elsewhere.
    3. Gather the UK tax information that affects the comparison, including your tax band if known, other taxable savings interest and any relevant ISA status, without pasting unnecessary personal identifiers.
    4. Paste those details and the provider information into a chatbot with the copyable prompt, asking it to compare only the supplied options and to show its assumptions.
    5. Check every rate and account condition in the drafted table against the provider pages you opened, and replace any changed or missing figure before relying on the result.
    6. Check the tax assumptions against the relevant GOV.UK guidance, and ask HMRC or a tax adviser if your wider income or tax position makes the treatment unclear.
    7. Compare the verified net-interest figures with your need for access and send no application until the provider confirms the rate, eligibility and account terms.

    Prompt

    Compare the UK savings options in the information below after tax. Use only the figures and facts I provide, and do not invent current rates, tax rules, allowances or account terms. For each option, show the account type, whether the interest is stated as AER or another rate, the balance used, gross interest, tax assumption, estimated tax, estimated net interest and estimated net return. Treat an ISA and a taxable savings account separately. State every assumption, identify any missing information, and show the calculation clearly. Do not tell me that an option is suitable or give regulated financial advice. Flag anything I must verify on GOV.UK or with the provider, including the current rate, withdrawal restrictions, introductory-period terms, eligibility and the UK tax treatment. If the supplied information is insufficient, ask focused questions instead of guessing. My tax year and relevant tax details are: [paste details]. My savings amount and timing are: [paste details]. The savings options and their quoted rates and terms are: [paste the provider information].

    Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

What it gets wrong

  • It cannot know whether a quoted rate is still available unless you provide current provider information and check it yourself.
  • It cannot infer your complete tax position from a savings balance alone, including other interest and income that may affect the result.
  • It cannot confirm that an account's withdrawal rules, introductory terms or eligibility conditions apply to you.
  • It cannot take responsibility for the choice or recover interest lost because an assumption was wrong.
  • This is not professional advice. A serious or unclear tax case needs HMRC or a qualified tax adviser, and a broader investment decision may need a regulated financial adviser.

Even on a YES, the friction has a name: real time truth, verification cost and stakes of error.

How we scored this

Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.

AxisScore (0–2)
Output2
Inputs1
Verification1
Liability2
Effort delta2
Total8 / 10

The methodology and its thresholds are published in full.

FAQ

Can ChatGPT calculate savings interest after tax?
Yes, if you provide the balance, rate, account type and tax assumptions. It can show gross interest, estimated tax and net interest, but you must check the rate with the provider and the tax treatment against GOV.UK.
Does AI know the best savings rates in the UK?
Not reliably without current provider data, because rates and account terms change. Paste the current provider information into the comparison and verify it on the provider's own page before acting.
Do I pay tax on savings interest in the UK?
The answer depends on the account and your wider tax position, so a chatbot should not guess from your balance alone. This is not professional advice; check the applicable GOV.UK guidance or ask HMRC or a qualified tax adviser if your position is unclear.
Is it worth moving my savings for a higher rate?
AI can compare the estimated net return if you supply accurate, current figures. It cannot decide whether the gain outweighs access limits, conditions or the risk of an incorrect tax assumption, so verify those points with the provider before moving money.

Nearby answers

All Savings & investing basics rulings

Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.

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