Withholding Tax on Contracts Pakistan 2026 — Section 153(1)(a)

Construction contracts, EPC agreements, and works contracts sit in their own distinct category under Section 153(1)(c) — separate from goods and services. Here's how contract withholding actually works, including advance payments, sub-contracting chains, and how it differs from the WHT rules for ordinary service invoices.

What Counts as a "Contract" Under Section 153(1)(c)

Section 153 splits payments into three distinct limbs, and each carries its own rate: sale of goods under 153(1)(a), rendering of services under 153(1)(b), and execution of a contract under 153(1)(c). The third category is where construction and civil works contracts, EPC (engineering, procurement, construction) agreements, and contracts for the supply of labour generally fall — work that isn't simply a delivery of goods or a discrete professional service, but a broader undertaking to execute defined work over time. A single project frequently spans more than one limb at once: a construction contract that also includes supplying cement and steel technically involves both a "contract" component and a "goods" component, and correctly splitting the payment across the right categories — rather than withholding a single blended rate — is one of the more common technical errors on large projects.

Contract Withholding Rates — 2026

Contract WHT is charged on the gross amount of each payment, not on the contractor's profit margin — a distinction that matters most for low-margin construction work, where the withheld amount can represent a large share of actual project profit until the annual reconciliation evens things out at year-end.

Advance and Mobilization Payments Are Not Exempt

A frequent misunderstanding on construction projects is that WHT only applies once work is delivered or invoiced against a completed milestone. In fact, withholding under Section 153(1)(c) is triggered by payment, not by completion — a mobilization advance paid to a contractor before any physical work begins is still a payment under the contract, and the client must withhold tax on it at the applicable rate exactly as it would on a milestone payment. Contractors who budget mobilization advances as the full contract-rate amount, without accounting for the WHT deduction, routinely find their actual cash mobilization is lower than expected — this should be built into project cash-flow planning from the tender stage, not discovered at the first payment.

Withholding Across Sub-Contracting Chains

On larger projects where a main contractor engages sub-contractors for parts of the scope, withholding applies at each level independently. If the main contractor is itself a prescribed person (which most companies and larger AOPs are), it must withhold tax from payments it makes to sub-contractors, separate from and unrelated to whatever the original client withheld from payments to the main contractor. This means a sub-contractor several layers down a project's structure can have tax withheld by the party immediately above it, while that party has separately had tax withheld by the party above them — each link in the chain applies the obligation to what it pays out, not to what it receives. Main contractors managing multiple sub-contractors should track this centrally, since missing a sub-contractor withholding creates the main contractor's own compliance exposure, not the sub-contractor's. In practice, this means every payment voucher raised against a sub-contractor needs to go through the same withholding check as an external client invoice would — a purchasing or accounts-payable team used to only worrying about withholding on outside vendors can easily overlook that internal-feeling sub-contractor payments carry the identical legal obligation, simply because the relationship feels less like a formal client-supplier arrangement and more like an extension of the same project team.

Minimum Tax vs Final Tax for Contractors

For most companies executing contracts, WHT deducted under Section 153(1)(c) is treated as minimum tax — the contracting company still computes its actual tax liability based on real profit at year-end, and pays whichever figure is higher: the minimum tax already withheld on gross contract receipts, or the normally computed liability. This matters enormously for construction, where margins can be thin and gross receipts large — a company withheld against on Rs. 200 million of contract receipts has had a meaningful minimum tax collected regardless of whether the project was actually profitable. Certain categories of individual and AOP contractors may instead have contract WHT treated as final tax; confirming which treatment applies to your specific entity type before assuming either outcome avoids a nasty surprise at filing time.

Government Contracts vs Private Sector Contracts

Government departments, autonomous bodies, and public sector entities awarding construction and works contracts are prescribed persons and withhold tax the same way a private company client would. In practice, government contracts often come with additional documentation requirements — CPR challans, tender-specific tax clearance certificates, and sometimes coordination with the Auditor General's office — that private sector contracts don't require, so contractors bidding on public sector tenders should budget extra administrative lead time for WHT documentation alongside the tax itself, rather than assuming approval will move at the same pace as with a private client. Rates and treatment under Section 153(1)(c) don't differ between government and private clients; only the paperwork trail around them typically does. Contractors who work across both sectors often find it worth maintaining two slightly different documentation workflows — one lean process for private clients, and a more paperwork-heavy one for public tenders — rather than applying the heavier government-grade process to every engagement by default, which slows down private-sector project starts unnecessarily.

Compliance Checklist for Contractors

• Classify each payment correctly — contract execution, goods, or services — since rates differ
• Expect WHT on advance/mobilization payments, not just milestone payments
• Withhold on sub-contractor payments if your own business is a prescribed person
• Collect a withholding certificate for every payment received from a client
• Confirm minimum vs final tax treatment for your specific entity type before budgeting year-end tax
• Apply for a reduced-rate certificate if actual margins are consistently below what standard WHT implies

A Worked Example

A construction firm (an ATL filer, private limited company) wins a Rs. 50 million civil works contract from a developer. The developer, as a prescribed person, pays a Rs. 10 million mobilization advance at contract signing and withholds 7% — Rs. 700,000 — depositing that with FBR and paying the firm Rs. 9.3 million net. Over the life of the project, further milestone payments totalling the remaining Rs. 40 million are similarly subject to 7% withholding, bringing total WHT withheld across the contract to Rs. 3.5 million. Because this is a company and the payment is under Section 153(1)(c), that Rs. 3.5 million is treated as minimum tax — at year-end, the firm computes its actual tax liability on real profit from this and other contracts; if that computed liability comes to Rs. 2.8 million, the firm has effectively already overpaid and can claim the Rs. 700,000 difference back as a refund, but if the computed liability is Rs. 4.2 million, the firm still owes the additional Rs. 700,000 on top of what was already withheld. Had the firm been a non-filer, withholding at 14.5% instead would have taken Rs. 7.25 million out of project cash flow across the same contract — a difference of Rs. 3.75 million purely from filer status, which is why maintaining ATL status is treated as non-negotiable by contractors bidding on larger projects.

Common Contractor Compliance Mistakes

The recurring problems we see on construction and contracting engagements follow a consistent pattern. Contractors frequently fail to separate the goods component of a mixed contract (materials supplied) from the contract-execution component (labour and works), leading either side to apply the wrong rate and creating a mismatch that surfaces during an FBR audit of the client's withholding statements. Main contractors managing sub-contractors sometimes assume the client's withholding on the head contract "covers" the whole project, and skip withholding on sub-contractor payments entirely — this is incorrect, and the main contractor becomes liable for the sub-contractor-level shortfall plus surcharge once discovered. Some contracting companies treat all withheld tax as final and stop tracking actual profitability against it, only to discover at filing time that minimum tax computed on gross receipts was well below their real liability, leaving a large balance due with no cash set aside for it. And on public-sector tenders specifically, contractors sometimes underestimate the administrative lead time needed to obtain tax clearance documentation, which can delay payment release even after WHT has been correctly deducted.

How to Claim Contract WHT Credit

Withholding tax deducted from contract payments that is adjustable is credited against your annual tax liability at filing time. Collect withholding certificates from every client and, where applicable, every party above you in a sub-contracting chain, then enter the totals in the Tax Credits section of your FBR IRIS return. Kamboh Associates handles ongoing withholding tax compliance for contractors and construction businesses of every size — certificate reconciliation, minimum-tax vs final-tax classification, and annual return filing. WhatsApp 0328-4675162 for a review of your current contract WHT position.

Frequently Asked Questions