Why Doctors Have a More Complex Tax Situation

Most employees have one income source and one employer who deducts APIT automatically. Doctors in Sri Lanka rarely fit that pattern. A typical government medical officer also earns private practice fees, channelling income from hospitals, and sometimes consultancy or teaching income. Each of these is taxed differently, and mixing them up is one of the most common reasons doctors under-pay tax without realising it.

1. Government or Institutional Salary — Taxed via APIT

If you are employed by the government or a private hospital, your employer deducts Advance Personal Income Tax (APIT) monthly under the standard progressive bands: 0% up to LKR 1,800,000 a year, then 6%, 18%, 24%, 30% and 36% on each successive slab. This part of your income is largely handled for you — but it still counts toward your total taxable income when you file your annual return.

2. Channelling and Private Practice Income — Usually Not Deducted at Source

Channelling fees paid through a hospital, and income from your own private practice or clinic, are typically not subject to APIT withholding. This income falls under self-assessment. You are responsible for estimating and paying tax on it yourself through quarterly Statement of Estimated Tax (SET) instalments, and declaring the full amount on your annual return.

3. Combine All Income Sources Before Calculating Tax

The LKR 1,800,000 personal relief applies once per person per year — not once per income source. A doctor earning LKR 150,000/month in salary and LKR 100,000/month in channelling fees has combined annual income of roughly LKR 3,000,000, and the full amount is assessed together against the progressive bands, not treated as two separate LKR 1.8M-relief incomes.

4. Deductible Expenses for Private Practice

If you run a clinic or private practice, genuine business expenses — consumables, staff salaries, clinic rent, professional indemnity insurance, continuing medical education costs — are deductible against your practice income before tax is calculated. Keep receipts and a simple income-and-expense ledger; the IRD can request this during an audit.

5. Quarterly Instalments (SET) Are Mandatory Once Liability Exceeds LKR 6,000

If your estimated annual tax liability on non-APIT income exceeds LKR 6,000, you are required to pay quarterly Statement of Estimated Tax instalments rather than a single lump sum at year-end. Missing these instalments triggers interest charges even if you pay the full amount by the annual deadline.

6. Common Mistakes Doctors Make

• Assuming channelling fees are “already taxed” because the hospital deducts a commission
• Not declaring private practice income because it’s paid in cash
• Forgetting to combine salary and practice income when estimating their tax band
• Missing SET quarterly deadlines and accumulating avoidable interest

Calculate Your Tax

Use our free Sri Lanka Income Tax Calculator to combine your salary and practice income and see your total 2025/26 liability instantly, or check your quarterly instalment amount with our SET Calculator.