Delayed Construction Payments in SA: Your Rights

Most South African contractors who fail do not fail on workmanship. They run out of cash while waiting to be paid for work they finished months ago.

This guide explains your rights when a construction client pays late in South Africa. It covers the payment rules under JBCC, NEC and GCC contracts, interest on late payment, why clients pay late, how to prevent it and the steps to take when money is overdue.

Why delayed payments hurt South African contractors

Delayed payments hurt South African contractors because they pay for labour, materials and plant weeks before the client pays them. Add retention, often 5% to 10% of each certificate, and a contractor can carry a large share of a project’s cost on its own balance sheet. One late client can stall every other site.

Here is how the gap builds on a typical building job:

You do the work during the month and pay your team and suppliers.
You submit your payment claim at month end.
The principal agent or quantity surveyor values the work and issues a payment certificate.
The client pays within the period in the contract, or later.

Even when everyone keeps to the contract, the gap from spending to being paid can be six to eight weeks. When the certificate is late or the client pays late, it grows.

Retention makes it worse. On a R5,000,000 project with 10% retention, R500,000 is held back. Part may come back at practical completion and the rest at final completion, after the defects liability period. If completion slips, so does the money.

The quantity surveyor and principal agent sit at the centre of this. Their valuation and certificate start the payment clock, so a late certificate is often the first cause of a late payment.

What payment terms apply under JBCC, NEC and GCC?

Under JBCC, NEC and GCC contracts, the payment period, the interest rate and the right to suspend work all come from the signed contract and its contract data. There is no single industry-wide payment period in South Africa. Public sector clients have a separate duty to pay within 30 days of receiving an invoice, unless agreed otherwise.

The table below shows how each form works in general terms. Always read your own edition and contract data.

Contract form	Who certifies payment	Payment period	Late payment interest	Main remedies
JBCC Principal Building Agreement	Principal agent issues interim payment certificates.	Set in the contract and contract data.	As set in the contract.	Interest, suspension after notice, termination, adjudication.
NEC4 Engineering and Construction Contract	Project Manager certifies at each assessment date.	Within three weeks of the assessment date, unless the contract data says otherwise.	Interest at the rate in the contract data.	Interest, adjudication under the W options, termination.
GCC 2015 (civil works)	Engineer certifies the contractor’s monthly statement.	Set in the conditions and contract data.	As set in the contract.	Interest, suspension, adjudication, arbitration.

For public sector work, the Treasury Regulations under the Public Finance Management Act (PFMA) require national and provincial departments to pay within 30 days of receiving an invoice, unless otherwise agreed. The Municipal Finance Management Act (MFMA) has a similar 30-day rule for municipalities.

Prompt payment regulations under the CIDB Act have also been proposed. Check their current status before you rely on them in a notice.

For more on how the forms differ, read JBCC vs NEC vs GCC contracts.

Can you charge interest on late construction payments?

Yes, you can usually charge interest on a late construction payment, at the rate in your contract or, if the contract is silent, at the rate set under the Prescribed Rate of Interest Act 55 of 1975. That rate is published in the Government Gazette and is linked to the Reserve Bank’s repo rate, so it changes over time.

Interest runs from the day payment was due until the day it is paid. The simple method:

Daily interest = amount overdue × annual rate ÷ 365
Total interest = daily interest × days overdue

An illustrative example. A certificate of R1,000,000 is paid 45 days late. If the applicable rate is 11% a year:

Item	Amount
Amount overdue	R1,000,000
Daily interest (R1,000,000 × 11% ÷ 365)	R301.37
Days overdue	45
Interest due (R301.37 × 45)	R13,561.65

The 11% is only for the example. Use the rate in your contract or the current prescribed rate. Claim interest in writing, with the certificate number and due date, every time a payment is late.

Why do clients pay late?

Clients usually pay late for four reasons: they dispute the work or the valuation, the paperwork is slow, they are short of cash, or their approval chain is long. Each cause needs a different response. Knowing which one you face tells you whether to send evidence, chase a signature or protect yourself against credit risk.

Cause	Typical signs	What helps
Dispute over quality or valuation	Items removed from the certificate, defects raised late.	Photos, site diary entries, signed variation orders.
Slow paperwork	Certificate issued late, missing supporting documents.	Complete claims, submitted on time, with backup.
Client cash shortage	Excuses, part payments, waiting for sales or bank drawdowns.	Credit checks, payment guarantees, shorter payment cycles.
Long approval chain	Several sign-offs, finance team queries.	Know the process upfront, follow up at each stage.

Developers who fund construction from bank drawdowns often pay late when the bank’s quantity surveyor has not yet signed off. Ask about the funding structure before you sign.

How to prevent delayed payments

The best protection against late payment is set up before work starts: clear payment terms in the contract, complete claims every month, and a fixed follow-up routine. Most late payments that become disputes started as an incomplete claim or an unsigned variation. These steps cut that risk on any JBCC, NEC or GCC project.

Before you sign:

Check the payment period, interest rate and suspension rights in the contract data.
Ask how the client funds the project.
Ask for a payment guarantee on large or high-risk jobs.
Price the payment risk into your tender.

Every month:

Submit your claim by the contract date, with measurements, photos and site diary entries.
Get every variation approved in writing before you do the work.
Track the certificate date and the payment due date for each project.
Follow up a few days before the due date, not after.

When scope changes:

Price the variation and get it signed before the work starts.
Add it to the next claim with its approval attached.

For the full certificate process, see the JBCC payment certificate guide. For wider planning, see construction cash flow management in South Africa.

Still tracking payment certificates and retention in a spreadsheet? Wakha runs progress payments under JBCC, NEC and GCC, variation orders and a cash flow command centre in one software built for South African builders: see a product demo.

What should you do when a client pays late?

When a client pays late, act in steps: send a formal notice, claim interest, escalate in writing, then use the remedies in your contract such as adjudication or suspension. Follow your contract’s notice procedure exactly. A remedy used without the right notice can put you in breach. Take legal advice before you suspend work.

Step	When	What to do
1. Reminder	A few days before the due date	Confirm the certificate number, amount and due date.
2. Formal notice	The day after the due date	Written notice to the client and principal agent, quoting the contract clause.
3. Interest claim	With the notice	State the rate and how interest is calculated.
4. Escalation	If still unpaid	Write to the client’s senior management with the payment history.
5. Adjudication	If the amount is disputed or unpaid	Refer the dispute under your contract’s adjudication clause.
6. Suspension	Only if the contract allows it	Give the required written notice, then suspend and record the dates.

Formal notice. Use a clear subject line, such as “Overdue payment, certificate 7”. Quote the contract, the certificate, the amount, the due date and the days overdue. Keep a copy and proof of delivery.

Adjudication. JBCC, NEC and GCC all provide for adjudication. The adjudicator’s decision is usually binding until it is changed by arbitration or a court, and courts generally enforce it. It is faster and cheaper than going to court.

Suspension. Check the notice period and conditions in your contract first. Record the date you stopped and the date you restarted. Suspension adds pressure, but it also stops your own income, so use it with care.

Why spreadsheets fail to track payments

Spreadsheets fail to track construction payments because they do not know which certificate is due, which is overdue or which retention is ready for release. When the client queries a line item, the evidence sits in email, WhatsApp and paper. The time spent finding it is time the money stays in the client’s account.

Common problems:

Certificates built in separate files for each project, with formula errors.
No alert when a payment passes its due date.
Retention amounts tracked by hand.
Variation approvals and site photos stored somewhere else.

The fix is one record per project that links the claim, the certificate, the variations, the retention and the evidence, with due dates you can see across all sites.

The Bottom Line

Late payment is a contract problem before it is a cash problem. Know the payment period, interest rate and remedies in your contract data. Submit complete claims on time, get variations signed first, and act the day after a payment is due. Contractors who follow up early and in writing get paid sooner.

Frequently Asked Questions

What is a delayed payment in construction?

A delayed payment is any amount certified or due under a building contract that the client has not paid by the date in the contract. In South Africa, that date comes from the JBCC, NEC or GCC contract data. Once a payment is late, the contractor can usually claim interest and use the contract’s remedies.

What is a reasonable payment period for construction work in South Africa?

There is no single legal period for private work, so the period in your signed contract applies. Public sector clients must generally pay within 30 days of receiving an invoice under the PFMA Treasury Regulations and the MFMA, unless agreed otherwise. Check your contract data before you sign and price any long payment period into your tender.

Can I charge interest on late payments?

Usually, yes. Your contract sets the interest rate. If it is silent, the rate under the Prescribed Rate of Interest Act 55 of 1975 normally applies. That rate is linked to the repo rate and changes over time. Calculate interest from the due date to the payment date and claim it in writing.

What should I do if a client disputes a payment certificate?

Ask for the disputed items in writing, and ask the client to pay the undisputed part while the rest is resolved. Answer each query with measurements, photos, site diary entries and signed variations. If the dispute is not settled, refer it to adjudication under your contract’s dispute resolution clause.

Can a contractor stop work if not paid in South Africa?

Only if the contract allows it and you follow its notice procedure. Most JBCC and GCC editions give the contractor a right to suspend after notice when payment is not made. Check your edition. NEC relies more on interest, adjudication and termination. Suspending without a contractual right can put you in breach, so take legal advice first.

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