Export VAT refund: the document self-check before you file
Refunds stall for a short list of reasons: invoices that are not compliant, figures that do not tie out across the return, the books and the export documents, and documents or deadlines that slip. This checklist breaks those three into items you tick off or cannot, so the problems surface before the application goes in rather than after.
01The cash sitting on your books
For a factory with a high export share this is not a nice-to-have. It is real cash. Export sales are zero-rated, while the input VAT paid on purchases accumulates as a credit balance. That balance can be carried forward, or it can be claimed back — and plenty of companies carry it forward out of habit, year after year, until the amount sitting on the books is substantial.
Whether anyone actually files usually comes down to one thing: whether someone is willing to face the follow-up loop. And the length of that loop is set almost entirely by the quality of the self-check done before the application goes in.
02What the checklist covers
Four blocks of checks, in roughly the order a reviewer works through them.
- Invoice compliance. The required particulars on input tax invoices, consistency of the entity named on them, and the period each one belongs to. Invoices with particulars missing or the wrong name on them are struck out at review, and going through them one at a time is cheaper than having the whole file sent back.
- Three-way reconciliation. Amounts and periods compared across the VAT return, the accounting records and the export documents. Figures that disagree across the three are the main reason a claim goes to further examination.
- The chain of export evidence. Whether the customs declarations, the transport documents and the records of export proceeds received correspond to one another, and whether each one can be traced back to a specific sale.
- Documents and deadlines. When to file, which credit periods to claim, and who answers follow-up requests by when.
03Three things that make it go smoothly
None of this is complicated. It is work that belongs before the filing rather than during it.
- Control input invoices as they arrive. A refund is the product of routine discipline, not a push at filing time. Checking each invoice for the required particulars on receipt is far more realistic than going back to repair invoices once the application is being prepared.
- Reconcile before you file. Get the books, the returns and the export documents to agree first. A problem you find yourself can be handled calmly; the same problem found in review becomes a follow-up request.
- Have someone tracking the review. Queries raised during the review need prompt, accurate answers. Drift is the most common reason a refund slows down, and repeated drift shapes how later applications are received.
Promoted companies file through the same process, not a separate track. Two things are worth checking before you file: duty-free imports exempt the import leg only, so local purchases still carry ordinary, recoverable VAT; and duty-free import data has to reconcile with what the project reports under its BOI monitoring obligations, or the review tends to raise extra queries. How this plays out for BOI-promoted companies.
04Straight talk about amounts and timing
How much comes back, and how long it takes to arrive, depends on your input profile, your export share, how complete your documents are and how the review runs. There is no general answer, and we do not publish estimated ranges — a range would only mislead your budgeting. What this checklist can do is hold the controllable part steady: the documents that should be there are there, the treatment that should agree agrees, and queries get answered on time.
Your own credit balance, the track that applies to you, how complete your documents are and which periods are still open all have to be verified item by item against the accounting records, the returns and the export documents. Run the self-check first, list the items you cannot tick off, and have the advisory team look at those before deciding whether and how to file.
What is in the workbook
- Invoice compliance: required particulars on input tax invoices, consistency of the entity named, and period allocation, ticked off one by one
- Three-way reconciliation sheet: amounts and periods from the VAT return, the accounting records and the export documents set side by side
- Chain of export evidence: customs, transport and export proceeds checked for traceability transaction by transaction
- Follow-up response sheet: three columns for the query raised, the person responsible and the date the answer is due
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Common questions
- We have just kept carrying the credit forward. Can we still claim a refund later?
Carrying forward and claiming a refund are two different treatments, and the periods and conditions open to a claim are governed by the Revenue Department's current rules. Whether an older credit balance can be dealt with, and by which route, has to be verified period by period against your own filing record. It is not something to judge from a general statement.
- The self-check found invoices that are not compliant. Can they still be fixed?
It depends which kind of problem it is. Where particulars are missing and the supplier can reissue, it can usually be dealt with. Where the wrong entity is named, or the invoice is booked to the wrong period, the route is different. List the items you could not tick off, sort them by type, and work through them type by type rather than all together.
- Does applying for a refund invite an audit?
A refund application goes into a review procedure. That is the normal process, not an audit. What actually causes trouble is figures that do not agree across the returns, the books and the export documents — which is exactly the point of the self-check: what the reviewer sees should be one set of numbers that ties out.
Related
Sources
- Revenue Department (RD): the current rules on zero-rating for exports and on refunding accumulated input VAT credits, the conditions for a claim and the documents required. Checked 2026-07.
- Thai Customs: current requirements for export declarations and the supporting chain of export evidence. Checked 2026-07.
- General note: refund proportions, claimable periods, review timeframes and required documents are updated by official announcement. Companies holding investment promotion follow the same refund process as ordinary companies, but need to reconcile duty-free import data against their BOI monitoring filings. This checklist does not estimate the recoverable amount or the time to payment; the Revenue Department's current rules (rd.go.th) and case-by-case verification govern.
Once the self-check has produced a list, the order of work and the route for fixing each item depend on the case.
中文版 · Chinese version