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Plainbooks

Accounting & tax for small businesses

Tidy books, taxes on time, price known up front.

We look after the books, monthly tax, payroll and social security for online sellers, cafés, freelancers and small companies. Send documents on LINE, and we remind you before every deadline.

  • Send documents on LINE
  • Deadline reminders
  • Thai · English
Keyboard, headphones and notebook on a pale pink surface

Next deadline

  • ภ.ง.ด.1 / 3 / 53 · 15
  • ภ.พ.30 · 23
  • สปส.1-10 · 15

Dates can change by government announcement — check rd.go.th, dbd.go.th and sso.go.th every year.

Who it's for

Who we work with

  • A kraft parcel tied with pink ribbon

    Online sellers

    Shopee · Lazada · TikTok Shop

  • A café counter with a coffee cup and a vase of flowers

    Cafés & restaurants

    Daily sales, stock and part-time staff

  • A laptop on a white desk beside a plant and glasses

    Freelancers & service firms

    Withholding tax, invoices and personal tax

  • A flower shop front with buckets of flowers

    Shops & trading

    Input/output VAT and stock reports

Our standard

What you get every month

  • A reminder before each deadline

    A LINE message at least [5 business days] before each filing date

  • A plain-language summary

    Income, costs and tax due on one page

  • One named contact

    The same person every time — no repeating yourself

  • Price agreed in advance

    If your volume changes enough to affect the price, we tell you first

Pricing

Clear prices, based on your real volume

Every package includes bookkeeping and monthly tax filing. Prices are samples — your final price is confirmed in a written quote after we see your documents.

Starter

New companies, incorporated freelancers

From฿2,500/ month

  • Up to 30 documents a month
  • PND 1, 3, 53
  • Monthly summary
  • LINE deadline reminders
Ask for a quote
Most chosen

Growth

Online sellers and cafés with steady volume

From฿4,500/ month

  • Up to 80 documents a month
  • Everything in Starter
  • PP 30 for VAT businesses
  • Marketplace report reconciliation
Ask for a quote

Plus

Companies with staff and several sales channels

From฿7,500/ month

  • Up to 150 documents a month
  • Everything in Growth
  • Quarterly review call
  • Basic cost and stock report
Ask for a quote

Estimate your own price

How it works

Start in four steps

  1. 1

    Get an estimate

    Four questions, under a minute

  2. 2

    Short call

    15 minutes on LINE or phone to understand your business

  3. 3

    Written quote

    Price and scope in writing

  4. 4

    Go

    We collect documents, set up and plan your filing calendar

Tax calendar

The deadlines a small business needs to know

A sample calendar for companies with a 31 December year-end. We remind our clients before every one.

  • 15monthlyภ.ง.ด.1 / 3 / 53Withholding tax
  • 23monthlyภ.พ.30VAT return
  • 15monthlyสปส.1-10Social security contributions
See the full-year calendar

Next deadline

  • ภ.ง.ด.1 / 3 / 53 · 15
  • ภ.พ.30 · 23
  • สปส.1-10 · 15

Dates can change by government announcement — check rd.go.th, dbd.go.th and sso.go.th every year.

FAQ

Common questions

Can I send documents on LINE?

Yes for everyday documents. For files with lots of personal data, please use our secure upload link.

Are the prices on the site final?

They're sample prices by volume. We confirm your price in a written quote after seeing your documents.

Can you lower my tax?

We help you claim what the law allows, properly documented — but we don't promise tax outcomes.

Can I switch mid-year?

Yes — our handover process keeps every deadline. See the switching page.

Find out your price in under a minute

Run the estimate yourself, or just message the team.