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Income Tax Services Sri Lanka

APIT, RAMIS, VAT, and corporate income tax. Filed on time, every filing window

Every IRD obligation. APIT, VAT, SET, corporate income tax, and WHT - is tracked on a shared compliance calendar. Returns are prepared, reviewed by a senior ICASL-qualified tax specialist, and filed directly in RAMIS before each deadline.

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WinCore's RAMIS-experienced tax team handles IRD correspondence, deadline management, and multi-tax coordination. APIT, VAT, SET, and corporate tax - under a single engagement.

Every engagement is deadline-anchored, with proactive reminders, IRD correspondence support, and in-session RAMIS filing, so no submission window is missed.

Starting from LKR 15,000 per return2-7 days per filing
Return quality
Reviewed filing packs
Regulatory scope
IRD and RAMIS aware
Advisory support
Specialist tax team
Planning horizon
Quarterly and annual

Led by Kavindu Perera, ACA (ICASL): Head of Accounting & Compliance

Content last reviewed: June 2026

What is tax compliance outsourcing in Sri Lanka?

Tax compliance outsourcing means engaging a specialist team to manage your IRD obligations - APIT, VAT, corporate income tax, SET, and WHT - in place of an in-house team. In Sri Lanka, all filings go through RAMIS (Revenue Administration Management Information System), and missed deadlines trigger statutory penalties. WinCore's ICASL-reviewed team manages the full compliance calendar: prepares returns, handles IRD correspondence, and files directly in RAMIS so your business never misses a window.

Speak to a RAMIS-registered tax specialist
What's Included

What our tax compliance service includes

Everything you need for professional service delivery with no hidden costs or surprises.

Corporate income tax return

Return prepared from your accounting records, reviewed by a senior tax specialist, and filed in RAMIS within 8 months of your accounting year close.

APIT (employer monthly remittance)

Monthly APIT computed per employee against current progressive bands, remitted to IRD by the 15th. Annual APIT return filed by 30 April.

SET (quarterly estimated tax)

Quarterly SET instalments calculated, scheduled, and submitted via RAMIS. No surprise balances at year-end corporate tax assessment.

RAMIS filing and portal management

Returns prepared in RAMIS-aligned working papers, filed directly in the portal, and acknowledgements stored with supporting schedules.

Tax planning and advisory

Allowable deductions, investment incentives, and timing strategies under Sri Lankan tax law reviewed annually, so your effective rate stays as low as the law permits.

VAT registration and returns

VAT registration handled when turnover crosses the LKR 60M annual threshold (LKR 15M per quarter). Monthly VAT payments by the 20th, and monthly or quarterly returns with input/output reconciliation filed before each RAMIS deadline.

Withholding tax (WHT)

WHT calculated on qualifying payments, payment vouchers uploaded to RAMIS, and quarterly schedules reconciled. No accumulation of unremitted WHT.

IRD audit and inquiry support

Supporting schedules prepared, IRD correspondence handled, and a senior specialist represents your position during reviews or investigations.

Shared compliance calendar

Every deadline for your entity. VAT, APIT, SET, corporate tax, and WHT - tracked in a shared calendar with proactive reminders before each window.

How the filing actually happens

RAMIS filing workflow for Sri Lankan companies

Every filing follows the same disciplined sequence: collect → prepare → review → submit → archive. WinCore captures the source data from your accounting records, prepares the return in our RAMIS-aligned working papers, runs a senior reviewer pass, files directly in RAMIS, and stores the submission acknowledgement alongside the supporting schedules.

  • VAT. Monthly or quarterly submission with input / output reconciliation.
  • APIT / PAYE. Monthly remittance with employee-level schedules.
  • WHT. Payment voucher upload + quarterly schedule reconciliation.
  • SET, SSCL, and corporate income tax. Return assembly, payment schedule, and IRD acknowledgements.

All deadlines flow into a shared compliance calendar, and any IRD correspondence is triaged by the same lead who filed the return - so context is never lost between filing and follow-up.

Our Process

How tax onboarding works

Our streamlined workflow keeps projects on schedule, transparent, and measurable for every stakeholder.

1

Compliance mapping

Your prior-year returns, trial balance, and payroll summaries are reviewed. Every active tax obligation is mapped to its RAMIS deadline and assigned to your compliance calendar.

1-2 days

2

Return preparation

Returns are prepared in RAMIS-aligned working papers from your accounting records. Input/output reconciliation, WHT schedules, and APIT listings built in at this stage.

3-5 days

3

Senior specialist review

An ICASL-qualified tax specialist reviews every return before filing. Queries are resolved internally. Nothing is filed with unresolved positions.

1 day

4

RAMIS filing and acknowledgement

Returns filed directly in RAMIS. Acknowledgements and payment confirmations are stored with supporting schedules. Ready for any IRD follow-up.

1 day

Key Benefits

Why businesses choose WinCore for tax compliance

Experience the advantages of working with Sri Lanka's leading professional service provider.

  • No late filing penalties. Every RAMIS deadline tracked and met by your named tax specialist
  • Your effective tax rate is reviewed annually against all allowable Sri Lankan deductions
  • Late surcharges on delays within our control are absorbed in the engagement fee
  • RAMIS working papers are retained so any IRD inquiry gets a prepared response, not a scramble
  • One senior ICASL-qualified specialist owns the full filing calendar. VAT, APIT, SET, and corporate tax
  • IRD audit representation included. No separate engagement letter required for standard inquiries
  • Budget tax changes communicated to you within two weeks of each annual budget
  • Your internal finance team spends less time on compliance administration each quarter
Client Success Stories

What our clients say

Illustrative Sri Lanka tax advisory workspace with RAMIS schedule, VAT checklist, and review notes
4.8 out of 5 stars
“WinCore manages our RAMIS and VAT workflow with strong consistency. We have maintained on-time tax submissions for two consecutive quarters without late penalties.”
Nimal Gunasekara
Export Trading Co.
Signed testimonial gathered after RAMIS submission and tax compliance review.
Verified: Feb 25, 2026
Illustrative tax planning review session with filing timelines and compliance documentation
4.7 out of 5 stars
“They simplified our corporate tax, VAT, and APIT positions into clear action plans. Our internal finance reviews are now faster and less reactive before deadlines.”
Priya Wickramasinghe
Tech Solutions Lanka
Signed testimonial gathered after quarterly VAT and corporate tax planning review.
Verified: Mar 9, 2026

Testimonial policy: quotes are displayed only after operational validation. Personal and company identifiers remain anonymized by default until legal and client content approvals are complete.

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Ensure compliance and minimize tax liability with professional support

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Compare your options on Why WinCore or review common delivery questions in our FAQ.

Frequently Asked Questions

Common questions about our service

What is RAMIS in Sri Lanka?▾
RAMIS (Revenue Administration Management Information System) is the Sri Lanka Inland Revenue Department's e-Tax portal, introduced in 2016. Businesses use RAMIS to file corporate income tax returns, APIT schedules, VAT returns, and other IRD submissions electronically. WinCore's tax team handles RAMIS filings from LKR 15,000 per return.
What is APIT in Sri Lanka?▾
APIT (Advance Personal Income Tax) is employer-withheld income tax deducted from employee salaries monthly and remitted to the Inland Revenue Department via RAMIS by the 15th of the following month. It replaced PAYE from the 2020/21 assessment year. Employers must submit an annual APIT statement by 30 April and issue a T10 certificate to each employee.
What are the income tax bands in Sri Lanka 2025?▾
Sri Lanka personal income tax bands for 2025/26: first LKR 1,800,000/year is tax-free; next LKR 1,000,000 at 6%; next LKR 500,000 at 18%; next LKR 500,000 at 24%; next LKR 500,000 at 30%; balance at 36%. These progressive rates apply to resident individuals under the Inland Revenue Act No. 24 of 2017.
What is the VAT threshold in Sri Lanka?▾
The VAT registration threshold in Sri Lanka is LKR 60 million a year (LKR 15 million per quarter). A proposed cut to LKR 36 million was dropped before the VAT (Amendment) Act No. 14 of 2026 was passed, so the threshold is unchanged. Businesses exceeding this threshold must apply to register with the IRD within 15 days, pay VAT monthly by the 20th of the following month, and file VAT returns via RAMIS (quarterly for most businesses, monthly for eligible exporters and approved projects). WinCore handles VAT registration and return filing for Sri Lankan businesses.
How do I file income tax in Sri Lanka?▾
Income tax in Sri Lanka is filed electronically via the RAMIS portal. Individuals file personal income tax returns by 30 November; companies file corporate income tax returns within 8 months of the close of their accounting year. WinCore's tax team manages the full cycle. Return preparation, RAMIS submission, and IRD correspondence - from LKR 15,000 per return.
What tax filings can WinCore manage?▾
We handle corporate and individual returns, APIT, SET, VAT, and withholding submissions with complete RAMIS system support.
Do you help with tax audit responses?▾
Yes. Our specialists prepare supporting schedules, liaise with Inland Revenue, and represent you during reviews or investigations.
How quickly can you onboard a new taxpayer?▾
Most engagements mobilise within 3-5 business days once access and prior filings are shared, keeping you on track for statutory deadlines.
Can you help us reduce our tax liability legally?▾
Yes. Our tax planning advisory covers allowable deductions, investment incentives, and timing strategies permitted under Sri Lankan tax law to minimise your effective tax rate.
What records do we need to share to get started?▾
Typically, prior year returns, trial balance, payroll summaries, and VAT schedules. We provide a simple onboarding checklist so nothing is missed before your first filing deadline.

Updated for the 2026 tax year: this service workflow reflects current Sri Lankan filing requirements. Review the current income tax bands.

Key terms: RAMIS and APIT

RAMIS (Revenue Administration Management Information System) is the Inland Revenue Department's online portal for filing income tax, VAT, and APIT returns in Sri Lanka. Introduced in 2016 to modernise tax administration, RAMIS is now mandatory for all registered companies and individuals with taxable income, who must file through ramis.ird.gov.lk.

APIT (Advance Personal Income Tax) is the monthly tax deduction Sri Lankan employers must calculate and remit to the IRD on behalf of employees earning above the monthly threshold. APIT replaced the PAYE system from Year of Assessment 2020/2021 under Section 83 of the Inland Revenue Act No. 24 of 2017.

Calculate VAT obligations →Estimate SET payments →Plan quarterly income tax instalments →

RAMIS filing support for Sri Lankan businesses

RAMIS success depends on disciplined source-data reconciliation, role-based portal access, and a submission order your team can repeat every month. Our tax practice supports APIT, VAT, and corporate-tax workflows inside the same operational control cycle.

Read the RAMIS filing guideReview the current income tax bands

Statutory context

Further reading

Field-tested explainers from the WinCore team - pulled from the blog so you have the statutory context next to the service page.

Explore the full WinCore blog →