PARTLY

As of 13 August 2026, AI can only partly calculate tax on your rental income.

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

Can you do it?

15 minutesto a draft.

1 hourto something you’d act on.

Cost, all in£0

Skill neededchat-fluent

Who has to check ita professional

What the alternative costsJulius AI is an AI data analyst that lets you upload a spreadsheet and ask questions about it.

If this goes wrong: you submit an incorrect rental-income figure or claim an expense incorrectly, and you remain responsible for the resulting tax, interest or penalties.

What to actually do

  1. Hand it to a person

    The route this page recommends

    Someone with a licence or accountable authority has to sign this before it counts.

  2. Use a tool built for this

    Second choice

  3. Do it yourself

    The distant third

    A chat interface, chat-fluent skill, and roughly 1 hour until you can act on the result.

    How to actually do it

    1. Open GOV.UK guidance for UK property income and the relevant Self Assessment section for the tax year you are dealing with.
    2. Gather tenancy agreements, rent records, letting-agent statements, mortgage interest statements, insurance records, repair invoices, service charges and property ownership details.
    3. Put each receipt and payment into a spreadsheet with the date, description, amount, property, payer and a provisional category, keeping capital purchases separate from repairs.
    4. Paste the spreadsheet totals, ownership details, tax year and relevant GOV.UK or HMRC guidance into the prompt, removing bank-account numbers and other unnecessary personal data.
    5. Ask the chatbot to calculate the result line by line, list missing information and mark every expense whose tax treatment is uncertain.
    6. Compare each classification and calculation against the official guidance, your original records and the spreadsheet totals, correcting any unsupported assumption.
    7. Send the records, draft calculation and flagged questions to an accountant or tax adviser before using the figure in a return or making a tax decision.

    Prompt

    Help me prepare a calculation of my UK rental income for the tax year [tax year]. This is a calculation aid, not professional advice. Use only the facts and official HMRC or GOV.UK sources I provide, and do not invent tax rates, allowances, reliefs, deadlines or expense rules. First list the facts and documents needed, then identify anything missing or ambiguous. Separate rental income, allowable expenses, finance costs, capital expenditure, personal costs and amounts belonging to another owner. Show the calculation line by line, state every assumption, and give a separate list of points that an accountant or tax adviser must confirm. Do not tell me that an expense is deductible unless the supplied official source supports it. Do not produce a Self Assessment submission and do not present an uncertain result as final. Here are my facts and records: [paste facts, figures and document summaries]. Here are the official sources I want you to use: [paste GOV.UK or HMRC links and relevant text].

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

What it gets wrong

What caps this at PARTLY: legal accountability, regulated advice and judgement under ambiguity.

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)
Output1
Inputs1
Verification1
Liability0
Effort delta1
Total4 / 10

The methodology and its thresholds are published in full.

FAQ

Can ChatGPT calculate tax on my rental income?
It can organise your figures and produce a provisional calculation, but it may apply the wrong treatment to expenses or finance costs. Check the calculation against current GOV.UK guidance and ask an accountant or tax adviser to confirm a serious or complicated case.
What information does AI need to calculate rental income tax?
Give it the tax year, rent received, ownership split, mortgage or finance details, repairs, insurance, agent fees, service charges and other property costs, with records supporting each amount. It also needs facts about private use, changes of use and other income where those affect the calculation.
Can AI tell me which rental expenses are tax deductible?
It can compare expenses with guidance you provide, but it cannot reliably resolve ambiguous or unusual costs. Treat its classification as a draft and have an accountant or tax adviser confirm any item that affects your return.
Is AI tax advice safe for landlords?
It is useful for sorting records and checking arithmetic, not for accepting an unchecked tax position. This is not professional advice, and you remain responsible to HMRC, so use an accountant or tax adviser for a material, complicated or uncertain case.

Nearby answers

All Tax returns & HMRC 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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