How much can a company deduct under Section 18A in South Africa?

A company can deduct qualifying donations to a Section 18A-approved Public Benefit Organisation up to 10% of its taxable income in a year of assessment. Any donation value exceeding the 10% cap is not lost — it rolls over and can be claimed in the following year of assessment.

What is the net cost of a Section 18A donation for a company?

Because the standard South African corporate income tax rate is 27% for the 2025/26 year, a qualifying donation reduces the company's tax bill by 27% of the donation value. A R200,000 donation therefore has an effective net cost of about R146,000 after the Section 18A deduction, assuming the company is within the 10% cap.

What must a valid Section 18A certificate contain in 2026?

Since 1 March 2023, a valid Section 18A receipt must include the PBO's name, address and 18A reference number, the date of receipt, a unique receipt number, the donor's name and nature (individual or company), the donor's identity or company registration number, the donor's income tax reference number, the donor's contact number and email, the amount and type of donation, and certification that the donation will be used solely for approved public benefit activities.

What is IT3(d) and does it affect corporate donors?

IT3(d) is the third-party return that Section 18A-approved organisations must submit to SARS, reporting the donation certificates they have issued. PBOs submit bi-annually (by 31 October) and annually (by 31 May). It affects donors indirectly: SARS uses this data to validate deductions, so donors should ensure their tax reference number and details on the certificate are correct.

Does sponsoring a school through Lenillium qualify for Section 18A?

Yes. Lenillium Education holds Public Benefit Organisation (PBO) status, and providing free education to under-resourced communities is a qualifying public benefit activity. A qualifying school sponsorship therefore entitles the corporate donor to a valid Section 18A certificate, alongside B-BBEE Socio-Economic Development points and ESG / UN SDG 4 alignment.

Section 18A Tax Deductions for Corporate Donors

For a South African company, Section 18A of the Income Tax Act is one of the few places where doing good and reducing tax point in exactly the same direction. A qualifying donation to an approved Public Benefit Organisation (PBO) is deductible against taxable income — which means the state effectively co-funds your corporate social investment. This guide is written specifically for corporate donors: finance teams, CSI leads and decision-makers who need to understand the mechanics, the limits, and the compliance detail before committing budget.

This article is general information, not tax advice. Always confirm your specific position with a registered tax practitioner. For a shorter overview, see our companion article, Section 18A Tax Deduction South Africa: What Corporate Donors Need to Know.

10%Max deduction, as a share of taxable income, per year

27%Corporate income tax rate (2025/26) — your effective saving

Roll overDonations above the 10% cap carry to the next year

What Section 18A Actually Does for a Company

Section 18A allows a taxpayer — including a company — to deduct the value of a bona fide donation to a Section 18A-approved organisation from its taxable income. Reducing taxable income reduces the tax bill. Because the standard corporate income tax rate is 27% for the 2025/26 year of assessment, every R1 of qualifying donation cuts corporate tax by roughly 27 cents. The net cost of giving is therefore about 73 cents in the rand for a company inside the cap.

Two approvals sit behind that benefit. The organisation must be a registered PBO, and it must separately hold Section 18A approval — granted by SARS only to organisations whose activities fall within Part II of the Ninth Schedule of the Income Tax Act. Education for the benefit of the public is a listed qualifying activity, which is why funding a school platform is squarely within scope.

The 10% Cap and the Rollover — Explained for Finance Teams

The deduction a company can claim in a single year of assessment is capped at 10% of its taxable income (taxable income calculated before the Section 18A deduction itself, and before certain other adjustments). This is generous: a company with R20 million of taxable income could deduct up to R2 million of qualifying donations in one year.

Crucially, donations above the 10% ceiling are not lost. The excess is carried forward and treated as a donation made in the following year of assessment, where it can be deducted subject to that year's 10% cap. This rollover makes larger, multi-school sponsorships tax-efficient even for companies whose donation exceeds 10% in the year they pay.

Worked Example — Single School Sponsorship

R200,000 sponsorship, company within the cap

Company taxable incomeR5,000,000

10% Section 18A ceilingR500,000

Lenillium sponsorship (fully deductible)R200,000

Tax saving at 27%R54,000

Effective net cost of sponsorship≈ R146,000

Worked Example — Multi-School Pledge & Rollover

R1,000,000 pledge, company above the cap

Company taxable incomeR7,000,000

10% ceiling deductible this yearR700,000

Excess carried to next yearR300,000

Tax saving this year (27% × R700k)R189,000

Total tax saving across both yearsR270,000

In the second example, the full R1 million is eventually deducted — R700,000 now and R300,000 next year — for a combined tax saving of R270,000, again about 27% of the donation. The rollover simply spreads the benefit; it does not reduce it.

Section 18A Is Only One of Three Benefits

For a South African company, the tax deduction rarely travels alone. A qualifying education donation can be reported against three separate frameworks at once — which is what makes education CSI unusually efficient.

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Section 18A

Deductible up to 10% of taxable income, with rollover of any excess.

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B-BBEE SED

Counts toward Socio-Economic Development on your B-BBEE scorecard.

🌍

ESG / SDG 4

Reportable under GRI/SASB and UN SDG 4 (Quality Education).

The same rand of spend can therefore reduce tax, earn transformation points, and populate your sustainability report. For the B-BBEE mechanics — the 1% net-profit-after-tax target and the 75%-beneficiary rule — see our guide to B-BBEE SED points through education sponsorship, and for the wider budgeting case, why education delivers the best CSI return.

What a Valid Section 18A Certificate Must Contain (2026)

SARS tightened the rules materially. Since 1 March 2023 (Public Notice 3082), a Section 18A receipt is only valid if it carries a specific set of donor and organisation details. If a field is missing, SARS can disallow the deduction — so corporate donors should check the certificate on receipt, not at filing.

Mandatory fields on a valid Section 18A certificate
Required field	Why it matters to a corporate donor
PBO name, address & 18A reference number	Confirms the recipient actually holds Section 18A approval.
Unique receipt number	Lets SARS match the receipt to the PBO's IT3(d) submission.
Donor name & nature (company)	Identifies the taxpayer entitled to the deduction.
Company registration number	The donor's identifying number for a juristic person.
Donor income tax reference number	Ties the deduction to your company's SARS profile.
Donor contact number & email	Now mandatory on the receipt itself.
Amount & type of donation (cash / in-kind)	In-kind donations require a description and valuation.
Certification of exclusive PBA use	States the donation will be used solely for approved public benefit activities.

IT3(d): The Reporting Layer Behind Your Deduction

Section 18A-approved organisations must now submit an IT3(d) third-party data return to SARS listing every 18A certificate they issue. Submissions run bi-annually (by 31 October) and annually (by 31 May) for the full year of assessment. SARS uses this data to pre-validate donor deductions, much as it does with medical or retirement data.

For a corporate donor, the practical takeaway is simple: your deduction is only as clean as the PBO's compliance. Donate through an organisation that (a) genuinely holds 18A approval and (b) submits IT3(d) properly, and make sure the tax reference number and registered details you give them are correct. Lenillium Education manages this reporting as part of every sponsorship.

What can invalidate a corporate Section 18A deduction

A reciprocal benefit. If the company receives goods, services or advertising value in return, SARS may treat it as a business expense, not a donation.
A defective certificate. Missing donor tax reference number, registration number or unique receipt number can void the deduction.
Exceeding the cap without rollover. Claiming more than 10% in one year, rather than carrying the excess forward, will be adjusted by SARS.
Donating to a non-18A entity. PBO status alone is not enough; the organisation needs specific Section 18A approval.

How a Company Claims It — Through Lenillium

Sponsoring a school converts all of the above into a straightforward, documented process:

1
Book a call
Discuss available schools, tiers and your CSI, B-BBEE and ESG objectives.
2
Choose your school(s)
Select from the active pipeline; align to your geographic or community focus.
3
Confirm the pledge
Sign the four-party agreement and transfer the once-off sponsorship.
4
Receive a compliant 18A certificate
Lenillium issues a valid Section 18A certificate with all mandatory donor fields on receipt of funds.
5
Claim & report
Your tax practitioner includes the certificate at filing; you receive brand-attributed impact reports for four years.

"For R200,000 — the cost of a single mid-range corporate event — a company funds four years of AI-driven Maths & Science for an entire school, and deducts most of it."

See the impact before you commit

Our latest results show exactly what a sponsorship delivers: 19 schools, 12,871 learners, and verified mark improvements. Review the data, then book a call to structure a Section 18A-qualifying sponsorship for your company.

Read the 2026 Impact Report Book a Call

Frequently Asked Questions

How much can a company deduct under Section 18A?

Up to 10% of taxable income in a year of assessment. Any qualifying donation above that 10% ceiling rolls over and can be deducted in the following year.

What is the real net cost of a donation for a company?

At the 27% corporate rate, a qualifying donation reduces tax by 27% of its value. A R200,000 donation nets to about R146,000 after the deduction, assuming the company is within the cap.

What must appear on the certificate in 2026?

The PBO's name, address and 18A reference number; a unique receipt number; the donor's name, nature, registration number, income tax reference number, contact number and email; the amount and type of donation; and certification of exclusive public-benefit use.

Does a Lenillium school sponsorship qualify?

Yes. Lenillium Education holds PBO status and provides qualifying public-benefit education, so a qualifying sponsorship entitles the corporate donor to a valid Section 18A certificate, plus B-BBEE SED and ESG value.

Section 18A rewards companies for putting money exactly where South Africa needs it most. Structured through a compliant, reporting-ready PBO, a school sponsorship lets a corporate donor cut tax, earn transformation points, strengthen its ESG story, and — most importantly — measurably lift Maths and Science outcomes for thousands of learners. Book a call to get started, or see the results first.