PP30 helper — prepare your output-VAT summary
PP.30 is the monthly VAT return that VAT-registered businesses must file. This BillsOS helper automatically totals the output VAT (7%) from your tax invoices for the month, so you can enter the figure on the PP.30 more easily — the VAT you remit is output tax minus the input VAT you paid on purchases. Importantly, BillsOS only prepares the output-VAT summary; it does not file the return or pay the tax for you. You file it yourself in the Revenue Department's e-Filing portal (efiling.rd.go.th) by the 15th of the following month (online filing extends to around the 23rd). This is general information, not tax advice.
The hardest part of PP30 is totalling your output VAT completely and correctly every month. BillsOS helps you PREPARE that summary from the tax invoices you issued — it does not file for you.
By the BillsOS team · Updated 8 Jun 2026
What this does and does not do: BillsOS totals your output VAT (the 7% you collected from customers) from your documents so it is ready to enter — but it does not file the return, does not pay tax, and does not total your input VAT for you. The actual filing happens in the RD e-Filing portal.
How output VAT is calculated
Output VAT is the 7% VAT you add on your tax invoices and collect from customers. Example: in a month with ฿120,000.00 of pre-VAT sales, your output VAT is ฿8,400.00 (computed straight from the BillsOS engine).
| Fee (before VAT) | ฿120,000.00 |
| VAT 7% | ฿8,400.00 |
| Total invoiced | ฿128,400.00 |
| Less withholding tax 0% | -฿0.00 |
| Net the client pays (QR amount) | ฿128,400.00 |
PP30 then subtracts input VAT (the VAT you paid on purchases) from this output VAT; the difference is what you remit. BillsOS does not total input VAT — that comes from your purchase tax invoices.
Preparing the figure with BillsOS
- Turn on VAT mode and issue every sale as a tax invoice with 7% VAT.
- Use Tax Autopilot to pull that month’s output-VAT summary.
- Enter the output VAT (with your own input VAT) into PP30 in the e-Filing system.
The actual filing is done at the Revenue Department: efiling.rd.go.th
Open Tax Autopilot
Tax Autopilot totals your output VAT and the tax withheld from you, ready to print or export as CSV for your accountant.
Open Tax Autopilot → VAT calculator
See also: PP30 filing guide · Thai tax answers
Missed filing PP30 for a month — what now?
A common situation: a VAT-registered business suddenly realises they forgot to file last month’s PP30 — whether or not there was tax due that month. The general approach is to file the late return in e-Filing as soon as possible, since the surcharge and penalty accrue with every day of delay. The longer it sits, the more it adds up.
The actual surcharge/penalty amount and correction steps depend on the specifics of each case. This is general context, not advice for your specific situation — contact the Revenue Department or your accountant to file the correction properly.
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BillsOS only formats and computes documents for you. This is general information, not tax advice — please confirm with the Revenue Department or your accountant.