Contractors and sub-contractors in Pakistan — whether doing construction work, supplying materials, or delivering services under contract — are taxed differently from ordinary businesses because payments to them fall under withholding tax rules in Section 153 of the Income Tax Ordinance. Understanding how these deductions apply, and whether they are final or adjustable, changes how much paperwork and tax planning a contractor actually needs.
Section 153: How Withholding Applies to Contractor Payments
When a company, government department, or association of persons pays a contractor, it is required to withhold tax at source before releasing payment. The rate depends on the nature of the contract:
- Execution of contracts such as construction or civil work: around 7% for both individuals and companies/AOPs, doubled for non-filers
- Supply of goods under a contract: around 4% for companies and individuals/AOPs alike, doubled for non-filers
- Services contracts covering IT, consulting, or other professional work: roughly 8% for companies and 10% for individuals/AOPs, doubled for non-filers
- Contracts tied to sporting or media events: around 10%, doubled for non-filers
Final Tax for Individuals, Adjustable for Companies
The most important distinction for a contractor to understand is this: for an individual contractor, the Section 153 deduction on construction execution and supply of goods is typically a final tax — nothing more is owed once it's withheld. For a company or AOP, the same deduction is adjustable, meaning it is credited against the entity's annual corporate tax bill rather than being the end of the story. This is why individual contractors can generally keep simpler records than a corporate contracting firm, which must maintain full books and file a detailed annual return.
Construction Contracts and Multi-Year Projects
Construction work often spans more than one tax year, which adds complexity for corporate contractors. Revenue is typically recognised using a percentage-of-completion approach, reflecting how much of the project has actually been finished in a given year rather than waiting for full completion. Each progress payment from the client is still subject to the same withholding at source, and for companies this accumulates as a credit against year-end tax liability; for individual contractors it remains a final tax on that portion of income, with no further annual filing obligation strictly required for that income stream — though filing is still advisable to maintain active filer status.
Mixed Contracts: Splitting Goods from Services
Contracts that combine material supply with installation or labour should be billed separately for goods and services, because each portion attracts a different withholding rate — the lower rate for pure supply of goods and the higher rate for the services component. Contractors who fail to break this out on invoices often find clients applying the higher services rate across the entire contract value, resulting in excess tax withheld that then has to be claimed back or adjusted later.
Sub-Contractor Obligations
Where a main contractor sub-contracts part of the work, withholding obligations apply at both levels. The client withholds tax when paying the main contractor, and the main contractor — if registered as a company or AOP — must also withhold tax when paying its sub-contractors. Main contractors making such payments are required to register as withholding agents with FBR; failing to deduct tax from a sub-contractor makes the main contractor personally liable for the shortfall plus any applicable surcharge.
Sales Tax and Provincial Registration
Beyond income tax withholding, contractors supplying goods may attract federal sales tax, while construction and services contractors above the relevant provincial turnover threshold generally need provincial sales tax registration as well. Export of IT and software development services can, in many cases, qualify for zero-rating, which is a further reason IT contractors should register correctly from the outset.
Managing a Refund Position
Corporate contractors working on thin margins sometimes end up with withholding tax credits that exceed their actual annual tax liability, creating a chronic refund position. Since FBR refund processing can take time, contractors in this situation can apply for a reduced withholding rate under Section 159 rather than waiting for refunds on over-deducted tax — this materially helps working capital for firms billing large gross contract values against small net margins.