Payroll & HR Administration in Thailand

One month of payroll, traceable at every step

We freeze inputs five working days before pay day, because late data is the single biggest cause of wrong figures. That set covers joiners and leavers, overtime already approved by a supervisor, leave taken, additional earnings, deductions the employee consented to in writing, and any change of bank account. Only then do we calculate and send a draft for the authorised approver to review before the transfer runs.

The job does not end at the transfer. Each employee receives a pay record, contributions and the month's withholding return go in, and we run a three-way reconciliation between what the bank paid, what the payroll system shows, and what the ledger records. If those three disagree by even one baht we find the reason before closing the month rather than carrying the difference forward, because carried differences grow and get harder to explain.

The mistakes that turn into backdated bills

The most common issue is calling someone a contractor while in practice setting their hours, directing daily work and providing the company's equipment — the substance of employment. On inspection the employer usually carries backdated contributions with a surcharge, plus the withholding that was never taken. The second is paying an allowance every month under a welfare label: when severance or overtime is computed, a payment that is regular and certain may count as wages, so the base used was too low all along.

The third group is documentary. Many employers pay correctly but cannot show it: no overtime approvals, no written consent for deductions, no employee register, no time records. In a dispute the burden of proof tends to sit with the employer, so keeping the paperwork from day one is far cheaper than proving it years later — and it keeps a sale or due-diligence exercise from stalling.

An HR structure that scales with headcount

Up to about ten staff, what you must have is written contracts, an employee register, time records and a payment trail. Between roughly ten and fifty, add work rules that track the statute and a leave-approval flow that leaves a record, because verbal decisions start to contradict each other between supervisors. Past fifty, documented appraisals and a staged disciplinary process become the real protection when a performance dismissal is unavoidable.

Where foreign staff are employed, HR runs alongside work permit and visa work. The job title in the contract, the minimum salary set by nationality, and the stated workplace must agree across every document. When those three conflict, renewals attract extra requests and take longer, so we check the alignment at each promotion or salary revision rather than only near expiry.

When to act, and when waiting is fine

• You have just hired your first employee

  Register as an employer and put a written contract in place at once, without waiting for a full team

• A departing employee is claiming back pay

  Gather time records, overtime approvals and payment evidence for the whole period before replying; answering from memory usually costs you

• You are about to pay a large bonus for the first time

  Check how withholding on a lump sum is computed before pay day; under-withholding leaves staff with a bill at annual filing

• You plan to move payroll to a cloud system

  Move at the start of a tax year if possible and keep per-person cumulative reports from the old system; mid-year totals are where errors appear