30-day free trial · set up personally for you

Accounting software built for Thai accounting practices

Keep the books of all your clients in one place: Thai tax forms, e-Filing files, receipts scanned with a phone, and a portal for your clients. In seven languages.

Request access · Try the demo

• 30-day free trial
• No card needed
• We set it up with you

Already use Somdul?

• Accounting practice Sign in to your practice's workspace. Sign in
• Client of a practice Sign in to see your reports. To send documents, use the upload link your accountant gave you. Sign in

Built around Thai filings:

• ภ.พ.30
• ภ.ง.ด.1 · 3 · 53
• 50 ทวิ
• ภ.ง.ด.50 · 51
• สปส.1-10
• RD Prep
• SSO e-Service
• DBD e-Filing

Practice overview

Every client's month on one screen

See at a glance which clients have sent their documents, filed VAT, withholding tax and social security, closed the month and paid your fee.

• A monthly checklist per client, ticked as the work is done
• Tax deadlines for every client, moved for weekends and public holidays
• Your own fees: monthly bills, PromptPay QR and receipts

Thai tax

Tax forms straight from the books

Sales and purchase invoices flow into PP 30 and withholding tax into PND 1, 3 and 53, with no spreadsheet in between.

• 50 Tawi certificates and the yearly withholding summaries
• Files ready to import into RD Prep and SSO e-Service
• Corporate income tax workings (PND 50, 51) and DBD statements

Somdul Scan

Snap a receipt, Somdul types it

The phone scanner finds the page, straightens and cleans it, then reads Thai and English tax invoices: supplier, invoice number, date, lines and VAT.

• Works on any phone, with no app to install
• Nothing is saved until someone checks it against the document
• Clients can send documents from their own phone with a link

Your team

Run the team, not just the ledgers

Monthly jobs create themselves for whoever looks after each client, and everyone sees what's due.

• Task board, team calendar and announcements
• Approvals before staff entries are posted
• Each person's access set per client, with a full activity log

Small things that save hours

The time-savers accountants ask for, built in.

A tax ID fills in the company

Type a 13-digit tax ID and the name, branch and address come from the Revenue Department's VAT register.

No bill entered twice

Same supplier and invoice number, or the same total a few days apart? Somdul warns you before you post.

Sums in any amount box

Type 1200*3+450 and it works it out, so the calculator app can stay closed.

Post a month in one go

Tick the drafts you've checked and post them together, with a list of any that need a fix.

Same as last time

Repeat a client's usual invoice at the prices you charged them before.

Keyboard first, with Undo

Ctrl+S saves, Ctrl+Enter posts, and a deleted draft can be brought back.

Works with how your clients already sell

Bring the numbers in instead of typing them: from the till, the online shops and the program they used before.

POS sales, one click a month

Loyverse, Ocha or any till: daily takings by cash, card, QR and delivery apps become one journal a day, with the VAT report done. Each client's file layout is remembered.

Shopee, Lazada and TikTok Shop

Import the payout report: sales, platform fees and VAT in one journal, and orders imported before are skipped automatically.

Move in from any program

Express, FlowAccount, PEAK or SAP Business One: their Excel exports are recognised column by column, and the opening balances fill in from a trial balance.

e-Tax Invoice files

Tax invoices, credit and debit notes as XML in the Revenue Department's format, checked against ETDA's official rules.

Businesses bring themselves to you

A business already keeping its books in Somdul can invite you. Accept, they confirm, and its company is one of your clients, with all its records.

Grows a little at a time

Add 10 more clients or 5 more staff without moving up a whole plan. Companies with their own accounting team add group companies one at a time.

Everything a practice needs

Every client in one place

Switch between client companies in a click, with monthly checklists, team tasks and deadlines across all of them.

Thai tax, done properly

VAT (PP 30), withholding tax (PND 1, 3, 53), 50 Tawi certificates, social security, and files ready to import into RD Prep and SSO e-Service.

Scan instead of type

Photograph receipts and invoices with a phone. Somdul reads them, and you check before anything is saved.

A portal for your clients

Clients see their own reports and monthly packs, and send you documents through a link, no login needed.

Seven languages

Thai, English, Chinese, Japanese, Burmese, Lao and Khmer, so everyone on your team works in their own.

Secure by design

Every practice and every client is kept fully separate, with two-step sign-in, approvals and a complete activity log.

How it starts

1. Request access

   Tell us about your practice. It takes a minute.

2. We set you up

   We create your practice and send you your sign-in, usually within a day.

3. Try it for 30 days

   Add your first client with the setup wizard and run a real month-end.

Simple pricing

Start with a 30-day free trial. No card needed; pay by PromptPay when you are ready.

For accounting practices

Growing past your plan? Add +10 client companies for ฿290 or +5 staff for ฿390 per month, without changing plan.

Larger practice? We set up a plan that fits. Prices in Thai baht.

For companies

For companies doing their own books: an in-house accountant or finance team, a bookkeeper, or the owner. The account belongs to the company, so it carries on when staff change. Start free; Shopee, Lazada and POS sales from Lite.

Just starting? The Free plan has quotations, tax invoices and receipts for 30 sales a month.

Monthly or yearly, cancel any time. Prices in Thai baht.

Prices in Thai baht. Already have an accountant who uses Somdul? Invite them and they look after your books.

Questions

What is Somdul, and who is it for?

Somdul is online accounting software made for Thailand. It is built for accounting practices that keep the books for many client companies, and it also works for a business that keeps its own books. It runs in the browser on a computer or a phone, in Thai, English and five other languages.

How much does it cost? Is there a free trial?

For accounting practices: Solo ฿590, Team ฿1,490 or Practice ฿3,490 a month, every feature included, with a 30-day free trial and no card needed. Yearly costs ten months' price. A business keeping its own books can start free, and paid plans start at ฿149 a month. Prices are in baht; pay by PromptPay or card.

What happens when the free trial ends?

Nothing is deleted. Your practice becomes read-only until you choose a plan, then you carry on exactly where you left off.

Can one practice look after many client companies?

Yes. Each client is a company of its own with separate books, and your team switches between them in one click. The practice overview shows every client's monthly checklist and filing deadlines, and you choose who in the team can open which client. Your clients' own logins to the portal are free.

Does Somdul do e-Tax Invoices?

Yes. If the Revenue Department has approved your company for e-Tax Invoice by Time Stamp, Somdul makes each tax invoice, credit note and debit note as a PDF/A-3 file and opens the email to the buyer with ETDA in Cc, for you to send from your registered address. It can also download a document as an e-Tax Invoice XML file in ETDA's format. Somdul doesn't sign files with a digital certificate or submit them for you.

Can it make 50 Tawi certificates and PND 1, 3 and 53?

Yes. Withholding tax is recorded when you pay a supplier or run payroll. Somdul prints the 50 Tawi certificates and makes the files for the Revenue Department's RD Prep program for PND 1, 1A, 3 and 53, for e-Filing. PND 2, 3, 53 and 54 also print on the Revenue Department's own forms.

How do VAT and the PP 30 work?

Output and input VAT come straight from the sales and purchase documents you post. Each month Somdul prints the output and input tax reports in the Revenue Department's layout and gives the PP 30 figures in the form's order, with any excess carried forward. You file the PP 30 yourself on the Revenue Department's e-Filing.

Does it do payroll and social security?

Yes. Every month Somdul works out each employee's social security, withholding tax and net pay, and posts the payroll in one entry. It prints payslips and makes the PND 1 file and the social security contribution file (SPS 1-10) for SSO e-Service. For businesses, payroll is in the Business plan and above.

Can Somdul see our clients' accounts?

No. Each practice and each client is kept separate, and Somdul's own admin pages never open your clients' books. To fix problems, Somdul does see error reports, which can include what was on screen when something went wrong. Sign-in can have a second step, and every change is logged.

Where is our data kept, and what about the PDPA?

With Supabase, on Amazon Web Services servers in Singapore, over encrypted connections and encrypted where it is stored by our providers. Under the PDPA, each client company controls its own business records and Somdul processes them on its behalf; the privacy notice explains the transfer abroad and your rights. Backups are made every night.

We use Express, FlowAccount or PEAK. Can we move?

Yes. Export customers, suppliers, products and the chart of accounts from your old program to Excel and import the file as it is: Somdul matches the columns and shows every row before saving. Opening balances come from a trial balance in each client's setup wizard.

Does Somdul work with LINE?

Yes. From Somdul you can send a client a quotation to accept, a payment reminder or a request for documents through LINE, with the message written for you. And you can ask us anything about Somdul on LINE, in Thai or English.

Ready to try it with your own clients?

Request access · Try the demo

The demo opens straight away, no sign-up: a made-up practice with three clients and a year of books. It resets every night.

Questions? Chat with us on LINE Ask us anything about Somdul, in Thai or English. We reply as soon as we can.