Tax and business know-how
The questions Thai stores and SMEs face every month about tax, documents, stock and choosing a system, written so non-accountants can read them and get it done.
Tax invoices and VAT
Ann Shop accountant
- Updated 10 September 2026
Issue tax invoices from your POS and file the P.P.30 every month
Full vs abbreviated tax invoices, which one a retail shop should issue, and how to turn POS sales into a P.P.30 VAT return without typing them again.
Read more - Updated 10 September 2026
What a valid tax invoice must include: full, abbreviated, and e-Tax Invoice
The legally required items on full and abbreviated tax invoices, mistakes that make an invoice unusable for input VAT, and what an e-Tax Invoice is and whether small stores need one
Read more - Updated 10 September 2026
What is the P.P.30 VAT return, when is it due, and how do you fill it in from your sales?
The P.P.30 VAT return is filed monthly, even with no sales, by the 15th of the following month. How to fill in the sales, output VAT, and input VAT fields, and the penalties for filing late.
Read more - Updated 21 October 2026
VAT registration: when you must register, what documents you need, and what to do every month after
The 1.8 million THB revenue threshold, the 30-day deadline, documents to prepare for individuals and companies, how to register online, and your monthly duties after registering
Read more - Updated 21 October 2026
P.P.01, P.P.01.1 and P.P.20: which form do you need to register for VAT?
P.P.01 is the VAT registration application, P.P.01.1 is added only by exempt businesses that choose to register, and P.P.20 is the certificate the Revenue Department issues. Who uses which form, where to file and what to attach
Read more - Updated 22 October 2026
Can you issue tax invoices in Excel, and what to watch for
A full tax invoice made entirely by computer needs no prior approval, but Excel slips in 5 places: duplicate or skipped numbers, editing after issue, not keeping copies 5 years, missing items and invoices issued as a set. How to guard against each
Read more - Updated 23 October 2026
Comparing online accounting software prices for VAT-registered shops, 2026
Online accounting software prices for VAT-registered shops: PEAK, FlowAccount and an all-in-one POS-plus-accounting option, with monthly VAT duties and questions before choosing, checked on provider websites
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Withholding tax and filing dates
J Accountant from an accounting firm
- Updated 10 September 2026
Withholding tax, P.N.D.3 and P.N.D.53 for stores and SMEs
What percentage to withhold when you pay rent, service fees, advertising or shipping, how to issue a 50 Tawi certificate, and when to file the P.N.D.3/53
Read more - Updated 10 September 2026
Withholding tax rates table: 1%, 2%, 3%, 5% with worked examples
The withholding rates shops use most: services, rent, advertising and transport, whether to withhold before or after VAT, with real-number examples.
Read more - Updated 21 October 2026
Monthly tax calendar for PP.30, PND forms and social security
The monthly filing dates shops and SMEs need to know, on paper and online, for PP.30, PND.1, PND.3, PND.53 and social security contributions, plus what to prepare
Read more - Updated 21 October 2026
Line fees, phone and internet bills: is withholding tax due, and at what rate?
Monthly phone and internet service is withheld at 3%, number application and number service fees at 5%, only when the payer is a juristic person. With a worked example from a real bill and the form to file
Read more - Updated 21 October 2026
Booth and selling space fees: withholding tax 3% or 5%?
An exhibition booth with services from the organizer is a service, withheld at 3%. Renting shop space in a building is rent, withheld at 5%. With worked examples and the forms to file
Read more - Updated 21 October 2026
Paying an ordinary partnership: file PND 3 or PND 53?
An unregistered ordinary partnership is taxed like an individual and goes on PND 3, while a registered one goes on PND 53. How to check from documents, the rates to withhold and a worked example
Read more - Updated 21 October 2026
Quotation with 3% withholding tax: is it needed, how to calculate
A quotation is not a tax document and withholding happens when the customer pays, but it helps to show company customers the amount after withholding. With an example worked out before VAT, after VAT and after 3%
Read more - Updated 21 October 2026
Tax filing deadlines in November 2569 (for October activity)
Last days to file PND 1, PND 3, PND 53, P.P.30 and social security for October 2569, on paper and online. The 7th and 15th of November fall on weekends, so the Revenue Department moved them
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Payroll and staff
Lisa HR
- Updated 21 October 2026
How to file the P.N.D.1 online from your payroll software
What P.N.D.1 is, how it differs from P.N.D.1A, whether a small business must file, and how to make an RD Prep import file from your payroll.
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Choosing a POS system
Alin Front counter staff
- Updated 10 September 2026
How to choose a POS system for a Thai retail store in 2026
A 10-point checklist before choosing POS software: Thai tax, multi-branch stock, mobile use, data ownership and what to ask the provider before you pay.
Read more - Updated 10 September 2026
Free POS vs. monthly subscription POS: what is the difference, and which should a retail store choose?
Who free POS software is right for, what hidden costs you do not see when you sign up, and when a store should move to a monthly plan, with an 8-point checklist before you decide
Read more - Updated 21 October 2026
Excel vs GORINY Business Suite: how they differ and which shop should use which
Excel and shop software compared on 8 points, from cost, a single sale, sales documents and monthly tax to several users, several branches and losing the internet, plus signs it is time to switch
Read more - Updated 22 October 2026
Is Excel enough for shop accounts, and how does it differ from real bookkeeping?
A sole trader not registered for VAT can keep a cash receipts and payments report in Excel, but companies and registered partnerships must keep accounts under the Accounting Act. Who must do what, how a cash report differs from real accounts, and signs Excel is no longer enough
Read more - Updated 22 October 2026
Excel, Google Sheets or shop software: which should you choose?
Excel, Google Sheets and shop software compared on cost, sharing, stock deduction, tax and data loss, with how to choose by shop size
Read more - Updated 22 October 2026
Daily sales in Excel and the cash drawer does not match: how to fix it
When the counted cash does not match sales in Excel: common causes such as wrong change, transfers mixed with cash and unrecorded withdrawals, and how to close the day so it can be checked later
Read more - Updated 23 October 2026
Comparing prices of POS software popular with Thai retailers, 2026
Prices of POS software popular with Thai retailers compared: free POS, monthly POS, accounting software and all-in-one, with trade-offs and questions to ask, checked on each provider website
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Stock and switching systems
Akin Warehouse staff
- Updated 10 September 2026
Tracking stock in Excel: when to move to software, and how to start using barcodes
7 signs your Excel stock file is becoming a burden, how to prepare the file before moving, and steps to start using barcodes for products with and without factory barcodes
Read more - Updated 10 September 2026
Checklist for moving from your old software or paper ledger to a new system
What data to prepare, what opening balances are, how to choose the go-live date, and how to make sure no sales go missing while you switch software
Read more - Updated 22 October 2026
Excel stock does not match the shelf: common causes and fixes
When the count does not match the file, it is usually missed records, not theft. 7 common causes in Excel stock files, the signs of each, how to trace a difference after counting and how to stop it recurring
Read more - Updated 22 October 2026
Multi-branch shops on Excel: how to consolidate and when to switch
Shops with a separate Excel file per branch: how to consolidate without errors, VAT filed per branch, stock transfers between branches, and signs it is time for one system
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Customers and sales channels
Tangkwa Marketing
- Updated 10 September 2026
Bring customers who message you on LINE OA and your website into one CRM
Why LINE chats and website form entries get lost, and how to connect LINE Official Account and WordPress so every contact becomes a lead you follow up.
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