VAT & SSCL Invoice Calculator

Calculate cascading Sri Lankan business taxes. Easily add 18% VAT and 2.5% SSCL to a base price, or extract the exact tax amounts from a final inclusive invoice.

Rs.

The Social Security Contribution Levy (SSCL) is charged on the base price. Value Added Tax (VAT) is then calculated on the base price plus the SSCL amount.

Enter your amount to instantly calculate cascading VAT and SSCL invoice figures.

How VAT and SSCL are calculated together

In exclusive mode, the calculator applies SSCL to the base amount, adds that levy to the value used for VAT, and then adds VAT. In inclusive mode, it reverses the same combined multiplier to estimate the underlying base and each tax component.

The default inputs are 18% VAT and 2.5% SSCL. They remain editable because the correct liable turnover and tax treatment depend on the transaction and business activity.

Default rates and assumptions

The IRD tax chart lists the standard VAT rate and SSCL rate, together with registration thresholds and activity-specific liable-turnover rules.

Default Sri Lanka VAT and SSCL calculator inputs
TaxDefault rateImportant limitation
VAT18%Zero-rated and exempt supplies require different treatment
SSCL2.5%Applied to the liable portion of turnover, not always the full sale

Worked example for a Rs. 100,000 base

Using the calculator defaults, SSCL is Rs. 2,500. VAT at 18% on Rs. 102,500 is Rs. 18,450, producing a total invoice estimate of Rs. 120,950 and an effective addition of 20.95% over the entered base.

VAT and SSCL at common invoice values

Every row uses the calculator defaults - 2.5% SSCL applied to the base, then 18% VAT applied to base plus SSCL. The combined effect is a consistent 20.95% on top of the base, not the 20.5% you would get by adding the two rates together.

That 0.45 percentage-point difference is VAT charged on the SSCL. It is small on one invoice and material across a year of them, which is why the two levies cannot be collapsed into a single rate.

Invoice total by base value at 2.5% SSCL and 18% VAT, tax-exclusive
Base valueSSCL (2.5%)VAT (18%)Invoice total
Rs. 10,000Rs. 250Rs. 1,845Rs. 12,095
Rs. 25,000Rs. 625Rs. 4,613Rs. 30,237
Rs. 50,000Rs. 1,250Rs. 9,225Rs. 60,475
Rs. 100,000Rs. 2,500Rs. 18,450Rs. 120,950
Rs. 250,000Rs. 6,250Rs. 46,125Rs. 302,375
Rs. 500,000Rs. 12,500Rs. 92,250Rs. 604,750
Rs. 1,000,000Rs. 25,000Rs. 184,500Rs. 1,209,500

Working backwards from a tax-inclusive price

If you have been quoted a price that already includes both taxes, divide by 1.2095 to recover the base. A Rs. 120,950 invoice comes back to a Rs. 100,000 base; a Rs. 50,000 inclusive price comes back to about Rs. 41,340.

Do not subtract 20.95% from the inclusive figure - that is the classic error and it under-recovers the base. 20.95% of Rs. 120,950 is Rs. 25,339, which would leave Rs. 95,611 rather than Rs. 100,000. The percentage was calculated on the base, so it has to be divided out, not subtracted.

Common invoice mistakes

Keep the selected mode and rates visible when sharing a result so another person can reproduce the calculation.

  • Applying SSCL to 100% of turnover when a lower liable-turnover percentage applies.
  • Charging VAT or SSCL without confirming registration and the nature of the supply.
  • Treating an inclusive amount as an exclusive base, which adds tax twice.
  • Using a calculator result as a substitute for an IRD-compliant tax invoice or return.

More business tools

Put this calculator on your site

Free to embed on any site, with no signup. Paste this where you want the widget to appear, and keep the attribution line underneath it - that is the only condition.

<!-- VAT & SSCL Invoice Calculator by HariTools -->
<iframe src="https://www.haritools.com/embed/vat-sscl-invoice-calculator-sri-lanka"
        title="VAT &amp; SSCL Invoice Calculator - HariTools"
        width="100%" height="620" loading="lazy"
        style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
        referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
  <a href="https://www.haritools.com/calculator/vat-sscl-invoice-calculator-sri-lanka">VAT &amp; SSCL Invoice</a>
  by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>

See all embeddable calculators

Related Articles

Frequently asked questions

The Social Security Contribution Levy (SSCL) of 2.5% is charged on the base price. Then, Value Added Tax (VAT) of 18% is calculated on the base price plus the SSCL amount. This cascading effect creates an effective tax rate of 20.95%.

The standard rate configured here is 18%. Zero-rated and exempt supplies are treated differently and are not simply a lower percentage - an exempt supply carries no VAT and no input reclaim, while a zero-rated supply carries VAT at 0% but does allow input recovery. Confirm which category your supply falls into before invoicing.

In order, not together. Apply SSCL to the base value first, add it to the base, then apply VAT to that combined figure. On a Rs. 100,000 base at 2.5% and 18%, SSCL is Rs. 2,500, VAT is 18% of Rs. 102,500 which is Rs. 18,450, and the invoice totals Rs. 120,950.

No, and it is the most common mistake on Sri Lankan invoices. Because VAT is charged on a base that already includes SSCL, the combined effect is 20.95%, not 20.5%. Adding the rates understates the total by 0.45% of the base on every invoice.

Divide by 1.2095, do not subtract 20.95%. A Rs. 120,950 tax-inclusive figure divides back to a Rs. 100,000 base. Subtracting the percentage instead would leave Rs. 95,611, because the percentage was calculated on the base rather than on the inclusive total.

Registration is driven by turnover thresholds and the nature of the business activity, both set by the Inland Revenue Department and revised from time to time. Charging VAT without being registered is not permitted, so check the current threshold on the IRD site or with a tax practitioner rather than assuming.

Not always. SSCL applies to liable turnover, and the liable proportion depends on the business activity - for some activities only part of turnover is liable. This calculator applies the rate you enter to the full base you enter, so if only a portion of your turnover is liable, enter that portion.

Before. SSCL is computed on the base and forms part of the value on which VAT is then charged. Reversing the order produces a smaller total and an invoice that will not reconcile with a correctly prepared one.

No. This estimates the tax components so you can check a figure or quote a price. A compliant tax invoice has specific content requirements under the VAT Act, including registration numbers and prescribed particulars. Use your accounting system or an adviser for the document itself.