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PARTLY

As of 13 August 2026, AI can only partly calculate VAT on imported goods.

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

Can you do it?

15 minutesto a draft.

30 minutesto something you’d act on.

Cost, all in£0

Skill neededchat-fluent

Who has to check ita professional

What the alternative costsNo accountant or customs adviser price is provided here, so no professional fee is stated.

If this goes wrong: your business records the wrong import VAT amount and may need to correct its VAT return or deal with HMRC consequences.

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 30 minutes until you can act on the result.

    How to actually do it

    1. Open the commercial invoice, customs declaration or import entry, freight and insurance records, and the business VAT records for the transaction.
    2. Paste the relevant figures and text into the prompt, removing customer, supplier and reference details that are not needed for the calculation.
    3. Ask the model to list missing or uncertain inputs before it calculates anything, including the customs value, import duty, VAT rate and whether postponed VAT accounting applies.
    4. Use GOV.UK to check each cited rule, the applicable VAT treatment and the import entry details, then correct the prompt with confirmed information.
    5. Run the prompt again and compare the displayed arithmetic with the customs declaration, invoice and your bookkeeping entry.
    6. Send the calculation and source documents to your accountant or customs adviser for confirmation before using it in the VAT records or return.

    Prompt

    Calculate the import VAT for the UK business transaction described below. Do not invent missing figures, rates, classifications or rules. First list every input needed and mark each one as supplied, missing or uncertain. Separate the customs value, import duty, freight, insurance and any other amounts included in the VAT base. State whether the figures assume VAT paid at import or postponed VAT accounting, and explain how that changes the accounting entry. Show the calculation step by step in pounds, then provide a table with the inputs, formula, result and assumptions. Use the current GOV.UK position where a rule or VAT rate is needed, cite the relevant GOV.UK page, and flag anything that must be confirmed by an accountant or customs adviser. Do not present an uncertain result as final.

Transaction details:
[Paste the commercial invoice, customs declaration, freight and insurance charges, import duty information, VAT registration details, accounting treatment and any other relevant records here.]

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

What it gets wrong

  • AI cannot decide the correct customs classification or valuation when the import documents are ambiguous.
  • AI cannot reliably determine whether postponed VAT accounting or another accounting treatment applies without complete, accurate records.
  • AI cannot transfer responsibility for the VAT treatment from your business to the chatbot.
  • AI cannot make an uncertain calculation safe merely by showing clear-looking arithmetic.

What caps this at PARTLY: judgement under ambiguity, verification cost and legal accountability.

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
Liability1
Effort delta2
Total7 / 10

The methodology and its thresholds are published in full.

FAQ

Can ChatGPT calculate import VAT for my UK business?
It can calculate an indicative amount from confirmed figures such as the customs value, import duty and applicable VAT rate. It cannot safely settle an unclear customs classification, valuation or accounting treatment, so have an accountant or customs adviser check a consequential calculation.
What information does AI need to calculate import VAT?
Give it the import entry or customs declaration, commercial invoice, freight and insurance amounts, import duty, VAT rate and whether you use postponed VAT accounting. It should identify missing or uncertain information before producing a result.
Can AI work out import VAT under postponed VAT accounting?
It can explain and calculate the bookkeeping figures if you provide the relevant import records and confirm that postponed VAT accounting applies. Check the treatment against GOV.UK and your VAT records before including it in a VAT return.
Is it safe to use AI for import VAT calculations?
It is suitable for organising figures and checking arithmetic, but not for making an unchecked VAT decision. This is not professional advice, and a serious or ambiguous case needs an accountant or customs adviser.

Nearby answers

All VAT & tax filings 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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