From the first invoice
to Thai tax day
Freelancing in Thailand? Send invoices, chase late payments, collect every 50 Tawi withholding tax certificate, and know exactly which number goes in which box of the PND 90 return — all in one place, and free.
Good to know: the app itself is in Thai for now
This page is in English, but the screens inside GigFlow are currently in Thai — and so are the Revenue Department forms you file. GigFlow shows you where each number goes on those Thai forms. An English interface is on our list.
Quotations, invoices and receipts
Four templates with your own logo and colours. Fill it in once and get the quotation, invoice and receipt, with the amount written out in words. Print to PDF and send it to your client.
Mark as paid — everything else is done for you
GigFlow issues the receipt, closes the invoice and records the payment as taxable income. No typing the same numbers twice.
Email reminders when money is late
Get an email when a job is still unpaid, and reminders 30, 14 and 3 days before each tax filing deadline.
A line-by-line guide to the PND 90 form
See which number goes in which box of the real Thai tax return, and tap to copy it into the Revenue Department website. Includes a checklist of the 50 Tawi certificates you still need.
Know your tax bill before it arrives
Progressive tax with allowances, the 0.5% minimum tax most people don't know about, and what you've already had withheld — so you know whether you'll get a refund or owe more.
Your documents stay in your Google Drive
Payslips, 50 Tawi certificates and invoices are uploaded to your own Google Drive, filed by year, month and job automatically. We don't keep your files on our servers.
Paid in dollars, euros or yen?
Record income in USD, EUR, GBP, JPY, SGD and 7 other currencies. Tax is always worked out in baht.
Don't miss the mid-year PND 94
Find out whether you need to file the half-year return and how many days are left.
Excel export for your accountant
Income, expenses, 50 Tawi certificates, a filing summary and both the PND 90 and PND 94 guides — six sheets in one file.
Snap a 50 Tawi, we fill it in
Reads the tax ID, amounts and dates for you. (The photo is sent to Google Gemini to read, then deleted straight away.)
Install it on your phone
Works like an app. Log income the moment a client pays.
Do you pay people too?
Once you start hiring subcontractors, or run a small business that withholds tax, you have to give every payee a withholding tax certificate (50 Tawi). Switch to employer mode in Settings whenever you need it — your freelance records stay exactly as they are.
Company details, kept separate
Set your company name, tax ID, branch and address once. Certificates go out under the company, not the personal identity you invoice with.
50 Tawi certificates on the official form
Printed onto the Revenue Department's own layout, one at a time or a whole year in a single file. Withholding is calculated for you and certificate numbers run automatically.
Email it to the payee, keep a copy in Drive
Send the certificate to the person you paid straight from the page, and save a copy to your own Google Drive.
Monthly PND 3 / PND 53 attachments
Totals to remit for each month, the paper (7th) and online (15th) deadlines, and a file ready for e-Filing.