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Richard Knight, ACSI

Service

Thai Personal Tax Filing.

The annual Thai return, prepared correctly under the new rules.

Who this is for

People who typically come to me about this.

  • Persona 1

    Retirees newly inside the Thai system

    Spending 180 days or more in Thailand and remitting pension income, now required to file a Thai personal return for the first time.

  • Persona 2

    Expats who have filed, badly

    Have submitted Thai returns without claiming the double-tax relief that applies, and suspect they have paid tax they did not owe.

  • Persona 3

    People who left it late

    Realised mid-year that the 2024 change brought them into the net and want the position corrected before the deadline.

What's involved

How the work actually plays out.

Planning decides what you should do; filing is getting the return itself right under rules that changed in 2024. The work is to establish what is genuinely assessable, apply the relief the double-tax agreement allows, and see the return prepared and submitted correctly, separate from any product, with every cost set out in writing before you decide.

What is actually assessable

Not everything remitted is taxable, and not everything taxable is remitted. The first task is to separate assessable income from capital and from pre-residency funds, because filing a return that overstates the assessable figure is as costly as not filing at all.

Relief is claimed, not granted

The double-tax agreement gives credit for tax already paid at source, but the credit only applies if it is claimed correctly on the return. Many expats pay Thai tax they do not owe because UK or US tax already paid was never properly credited.

Common mistakes

Where this most often goes sideways.

  • Treating filing as the same task as planning.

    Good planning that is then filed incorrectly produces the same outcome as no planning. The return is where the plan either holds or unravels.

  • Overstating the assessable amount.

    Declaring every remittance as income, rather than separating capital and pre-residency funds, hands over tax that was never due.

How I work on this

The process, in three steps.

  1. 01

    Establish the position

    Residency for the year confirmed, remittances mapped, and assessable income separated from what is not.

  2. 02

    Apply the relief

    Double-tax credit and allowances applied so the return reflects what is genuinely owed, no more.

  3. 03

    Prepare and file

    The return prepared, checked with you, and filed correctly within the deadline.

Fees and what to expect

Plain-English fee transparency.

  • I am paid through commission on the products arranged and an ongoing fee on the assets managed. Every cost, and what it pays, is set out in writing before you decide.

  • You may ask what any recommendation pays me, and the figures that apply are agreed in writing in the engagement letter before you proceed.

  • A first 30-minute consultation costs nothing and obliges you to nothing.

  • Client assets are held in your own name on FCA-regulated platforms or SEC-licensed brokers, never by me.

Questions

Questions about this.

Begin a conversation.

Thirty minutes, by Zoom or in person at the Bangkok, Hua Hin or Pattaya office. Free, and without obligation. You leave with a clearer view of what is in front of you, whether or not the work proceeds.

Book a meeting

Choose a time that suits you.

Thirty minutes with Richard Knight, ACSI directly. By video, phone, or in person. No obligation.

Request a callback

I'll call you on your schedule.

Leave your details and the window that suits you. No preparation needed, and nothing is sold on the call.

How can I help?

Reply within one business day.

A retired expat reading the playbook in Thailand

Free guide

The 2026 expat in Thailand tax and pension playbook.

Richard Knight 路 richardknightuk.com

Free 路 About 12 minutes to read

The 2026 expat in Thailand tax and pension playbook.

The 2024 Thai remittance rules changed how pension income is taxed. What that means for you, what a QROPS really does, and the moves that compound over the next five years.

The guide opens on this page. No follow-up unless you ask.