Monthly Accounting Services in Thailand

Affordable All-in-One Solution for Businesses

Accurate | Compliant | Hassle-Free — Now with 20% Off

You need a strategic partner who can manage your monthly accounts, stay ahead of compliance deadlines, and provide clear financial insights — all at a reasonable cost.

Why Monthly Accounting Services Matters

Running a business in Thailand means dealing with ongoing financial responsibilities — from recording daily transactions to preparing monthly tax filings. If these are handled incorrectly or delayed, they can lead to compliance issues, penalties, and cash flow problems.

By choosing our monthly accounting service, you get a dedicated accounting team ensuring your financial records are always accurate, up to date, and ready for decision-making — and with our current 20% discount, you save more while staying compliant.

Monthly Accounting Services Packages.

Prices are indicative (THB, excl. VAT) and finalized after a short scoping call. Every package includes monthly bookkeeping (Thai GAAP/IFRS), VAT/WHT prep & e-filing, and a management report pack (P&L/BS/CF, AR/AP aging).

Accounting&tax

Essential

6,500 THB

+ 7% VAT

Accounting and Bookkeeping

฿4500

฿ 3,500 Monthly

1-30 Transactions per month
Accounting Document Archiving
Monthly Income Statement (PL)
Statement of Financial Position (BS)
Statement of Changes in Equity
Monthly Fixed Asset Register
Monthly General Ledger (GL)
Monthly Trial Balance (TB)
Accounts Receivable Aging Report
Accounts Payable Aging Report

Tax Preperation and Filing

฿3900

฿ 3,000 Monthly

1-30 Transactions per month
Tax Document Archiving
Withholding Tax (WHT)- Domestic
Withholding Tax (WHT) - Oversea
Issuing withholding tax certificate*
Value Add Tax (VAT) - Oversea
Value Add Tax (VAT) – Domestic
VAT Input - output Report
English translation of all tax form

15-20 Business days

Starting from the date we receive complete documentation from your side.

Accounting&tax

Growth

12,900 THB

+ 7% VAT

Accounting and Bookkeeping

฿8700

฿ 6900 Monthly

31-60 Transactions per month
Accounting document archiving
Monthly Income Statement (PL)
Statement of Financial Position (BS)
Statement of Changes in Equity
Monthly Fixed Asset Register
Monthly General Ledger (GL)
Monthly Trial Balance (TB)
Accounts Receivable Aging Report
Accounts Payable Aging Report

Popular

Tax Preperation and Filing

฿7500

฿ 6,000 Monthly

31-60 Transactions per month
Tax document archiving
Withholding Tax (WHT)- Domestic
Withholding Tax (WHT) - Oversea
Issuing withholding tax certificate*
Value Add Tax (VAT) - Oversea
Value Add Tax (VAT) – Domestic
VAT Input - output Report
English translation of all tax form

Popular

15-20 Business days

Starting from the date we receive complete documentation from your side.

Accounting&tax

Premium

20,800 THB

+ 7% VAT

Accounting and Bookkeeping

฿14000

฿ 11,200 Monthly

61-100 Transactions per month
Accounting document archiving
Monthly Income Statement (PL)
Statement of Financial Position (BS)
Statement of Changes in Equity
Monthly Fixed Asset Register
Monthly General Ledger (GL)
Monthly Trial Balance (TB)
Accounts Receivable Aging Report
Accounts Payable Aging Report

Tax Preperation and Filing

฿12000

฿ 9,600 Monthly

61-100 Transactions per month
Tax document archiving
Withholding Tax (WHT)- Domestic
Withholding Tax (WHT) - Oversea
Issuing withholding tax certificate*
Value Add Tax (VAT) - Oversea
Value Add Tax (VAT) – Domestic
VAT Input - output Report
English translation of all tax form

15-20 Business days

Starting from the date we receive complete documentation from your side.

Our Professional Accounting Services Standards

We work like your in-house finance team—clean, documented, and audit-ready. Below is our professional approach and the client-owned technical materials you will always have in your hands.

Accounting Framework & Policies

Thai GAAP/IFRS aligned; documented revenue, expense, and capitalization policies.

Chart of Accounts Architecture

Lock-down of codes, naming conventions, and version control for every change.

Source Document Control

Evidence-first bookkeeping: e-tax invoices, receipts, contracts, GRNs, bank advices.

Data Capture & Reconciliations

Bank feeds + manual tie-outs; AR/AP subledger to GL reconciliation every month.

Tax Compliance Engine

VAT (PP.30), WHT (PND.1/3/53, PP.36) prepared from reconciled ledgers only.

Reporting Package

Monthly pack: P&L, Balance Sheet, Cash Flow, AR/AP aging, VAT/WHT summaries.

MONTHLY WORKING SCHEDULE

We are dedicated to ensuring that everything is delivered on time.

With years of experience working with businesses across various industries, we aim to help the company stay compliant, avoid penalties, and gain better financial clarity. Our service fees depend on your company’s size, monthly income, and the number of transactions each month.

Payroll Data Cut-Off & Change Log Submission

Submit the month’s payroll inputs: salary base, approved overtime (with dates/hours), incentives/commissions and basis, allowances, and deductions (advances/loans). Flag HR changes—new hires, exits, bank/account updates, grade or pay adjustments—and attach attendance/leave reports. Use the agreed Excel template plus signed approvals (PDF), follow the naming convention (e.g., Payroll_YYYY-MM), and send it an email. Providing complete, clearly labeled files by the 25th allows ACCOUNTINFIRM CO., LTD. to validate early, resolve questions, and prevent last-minute issues that could affect pay accuracy and employee confidence.

Within 25^th of the month

Payslip Issuance & Disbursement Pack

(Net Transfer Summary)

We deliver draft payslips for each employee and a payroll summary covering gross pay, taxable/non-taxable items, statutory deductions, and net amounts. You also receive a bank transfer list or upload file ready for processing. We run variance checks against prior months, highlight anomalies (e.g., spikes in OT/commissions), and seek your “OK to pay” before finalizing. Payslips are distributed securely and individually. Minor corrections flagged promptly are turned around quickly so payday remains on schedule and staff trust stays intact.

Within 28^th of the month

Monthly Bookkeeping Document Request & Upload Protocol

(Net Transfer Summary)

You receive a concise reminder and upload link listing what we need for bookkeeping and tax: sales invoices/receipts, credit notes, POS/Z-reports, purchase bills/expenses, bank and merchant statements, petty cash logs with vouchers, payroll reports, withholding certificates, asset movements, and any import/export or FX support. We note outstanding items from the prior month and include naming rules to keep files organized. Prefer Slack or Line? We can mirror the reminder there so your team stays on track without changing your internal workflow.

Within 1^st of the following month

Accounting Documents Submission

(Complete Evidence Set)

Provide complete accounting documents per the checklist (see page 5): full bank statements (PDF + CSV if available), sales invoices/receipts and credit notes matched to settlements, supplier tax invoices with payment proofs, petty cash summary with numbered vouchers, payroll register and transfer proofs, asset invoices with in-use dates, and intercompany/FX documentation. Good naming and a tidy folder structure speed reconciliation, reduce back-and-forth, and enable timely preparation of draft tax forms.

Within 3^rd of the following month

Draft Tax Returns & Reconciliation for Client Review

(Complete Evidence Set)

We prepare draft monthly filings (e.g., VAT, WHT) and a reconciliation that ties figures to your records. You’ll see review notes on missing or inconsistent items and explanations for unusual movements. Please respond within 24–48 hours so we can finalize confidently and avoid penalties. If helpful, we attach a one-page snapshot summarizing tax payable, key drivers, and month-on-month changes—useful for management review and cash planning.

Within 8^th of the following month

Final Tax Filings & Official Pay-In Instructions

(Complete Evidence Set)

We deliver final approved forms plus the official pay-in slip or payment reference, with a clear last-payment date to avoid interest and fines. You’ll get a compact “Payment Pack” (forms, slip/instructions, and step-by-step payment guide). After payment, please share the receipt/confirmation for archiving. If late documents surface, we’ll advise whether to amend the return or roll forward to the next cycle, balancing compliance risk and practicality.

Within 10^th of the following month

Monthly Financial Statements & Executive Management Report

(Complete Evidence Set)

We issue your monthly financial package—Profit & Loss, Balance Sheet, Trial Balance, General Ledger, and Journal listings—plus a brief management summary (key variances, ratios, cash/AR/AP highlights). We flag action items (e.g., overdue receivables, unusual expenses) with suggested next steps. Deliverables can be provided as a board-ready PDF and an Excel file for drill-downs, giving management timely, decision-ready numbers to close the month cleanly.

Within 15^th of the following month

Driven by Trusted Technology

We use reliable, industry-standard software to streamline your accounting and bookkeeping processes — ensuring accuracy, consistency, and peace of mind.