As of 13 August 2026, AI can only partly calculate your working from home tax expenses.
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 costsA tax adviser or accountant is the alternative, but no comparable price is supplied in the available tool data.
If this goes wrong, you claim the wrong amount or an expense you are not entitled to claim and remain responsible for correcting it with HMRC.
What to actually do
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.
Use a tool built for this
Second choiceDo it yourself
The distant thirdA chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.
How to actually do it
- Open the relevant current working-from-home and employment-expenses pages on GOV.UK, and note the tax year and method they describe.
- Gather your employment or self-employment details, the number of days worked from home, employer reimbursements, and household bills that relate to the period.
- Remove private or unrelated costs from the figures, then record how each remaining cost is shared between work and personal use.
- Paste the prompt into an AI chatbot and provide the tax year, your work pattern, the figures, and the exact GOV.UK wording or links you found.
- Ask the model to calculate both the relevant HMRC method and actual additional costs only where the current guidance permits both, showing the formulas and assumptions.
- Compare every rate, eligibility condition and expense category in the answer with the GOV.UK pages you opened, and correct any unsupported or guessed item.
- Save the bills, work pattern, reimbursement evidence and checked calculation, then enter the figure only if it matches the current HMRC guidance or ask an accountant or tax adviser to check a serious or unclear case.
Prompt
Help me calculate my UK working from home tax expenses for the tax year [insert tax year]. This is a calculation aid, not professional advice. First establish whether I am an employee, a sole trader or both, and whether I am claiming actual additional household costs or a HMRC simplified method. Use only the facts and figures I provide. Do not invent rates, allowances, eligibility rules or missing figures. If a current HMRC rate or rule is needed, tell me exactly what must be checked on GOV.UK rather than guessing. Ask for any missing information before calculating, including my work days or hours, days worked from home, relevant household bills, business or employment use, whether anyone else contributes to the costs, and any employer reimbursement. Show each formula, the apportionment method, the tax year, the evidence needed, and the result in pounds. Separate expenses that may be allowable from expenses that need confirmation. Give me a final checklist of figures and GOV.UK points to verify before I use the result on a tax return. Do not file anything or tell me to claim an expense unless the stated HMRC rules and my eligibility have been checked.
Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.
What it gets wrong
- AI cannot establish your eligibility from incomplete facts or decide whether a cost is genuinely additional to your normal household spending.
- AI cannot guarantee that a rate or rule is current for your tax year unless you provide and check the current HMRC guidance.
- AI cannot replace evidence such as bills, work records and employer reimbursement records.
- The liability for the figure remains yours when you use it in dealings with HMRC.
- AI cannot resolve unusual arrangements, mixed employment and self-employment, or disputed expenses without a tax adviser or accountant.
What caps this at PARTLY: legal accountability, verification cost and regulated advice.
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.
| Axis | Score (0–2) |
|---|---|
| Output | 2 |
| Inputs | 1 |
| Verification | 1 |
| Liability | 1 |
| Effort delta | 2 |
| Total | 7 / 10 |
The methodology and its thresholds are published in full.
FAQ
- Can AI calculate my working from home tax expenses?
- Partly. AI can apply a stated HMRC method to your figures and show the working, but you must confirm your eligibility, the current tax-year rules and the evidence required on GOV.UK. This is not professional advice.
- What information does AI need to calculate working from home expenses?
- Give it your tax year, employment or self-employment status, days worked from home, relevant household bills, work-use apportionment and any employer reimbursement. It should ask about missing facts rather than estimate them.
- Can I claim tax relief for working from home?
- That depends on your status, why you work from home, the costs involved and the method allowed for the relevant tax year. Check the current GOV.UK rules before claiming, and ask an accountant or tax adviser about a serious or unusual case.
- Is it safe to use ChatGPT to calculate my working from home expenses?
- It is useful as a calculation worksheet, not as the final authority. Check every rate and eligibility condition against GOV.UK because you remain responsible for an incorrect claim, and this is not professional advice.
Nearby answers
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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