Before you start

A National Tax Number, obtained through the FBR's IRIS portal
A determination of your residence status for the tax year
Employment records and any foreign income documentation
A Pakistani bank account

Step-by-step

1
Work out your residence status against a July–June year
Presence of 183 days or more in the tax year makes you a resident individual, taxed on worldwide income. The year runs 1 July to 30 June, so a mid-year arrival splits differently from what a calendar-year assumption suggests. Count carefully in your first and last years — those are the ones where the answer is not obvious.
OnlineWho: YouOn arrival
2
Register for an NTN on IRIS
Pakistani individuals use their CNIC as their tax number; a foreign national registers separately on the FBR's IRIS portal. Do this early — banks ask for it and several transactions are cheaper with it.
OnlineWho: YouMonth 1
3
File a return every year, on time, even if tax was withheld
Filing is what puts you on the Active Taxpayers List. Registering does not. The list is rebuilt weekly and late filers can be admitted only on payment of a surcharge. Salary withheld at source does not remove the filing obligation.
OnlineWho: YouAnnually, by the FBR due date
4
Understand what non-filer status costs on ordinary transactions
Non-filers face higher withholding on property purchases, vehicle registration, dividends and certain banking transactions. On a property or car purchase the difference is large. This is the practical reason to file rather than any moral one.
OnlineWho: You
5
Check what falls to the Sindh Revenue Board rather than the FBR
Sales tax on services is a provincial tax in Pakistan, and in Karachi that means the Sindh Revenue Board, not the FBR. Consultants and service businesses registered here deal with two authorities on two different bases. A federal tax adviser is not automatically a Sindh one.
OnlineWho: You
6
Check the treaty position on any income taxed abroad
Pakistan has a wide network of double taxation treaties. If you are resident here and taxed elsewhere on the same income, the treaty and the foreign tax credit rules are where the answer lives. This is the one part of Pakistani tax genuinely worth paying an adviser for in the first year.
OnlineWho: You

Documents you’ll need

National Tax Number and IRIS login
Salary certificate and withholding statements from your employer
Bank statements
Records of foreign income and any foreign tax paid
Property and vehicle documents, where relevant

Things most newcomers don’t know

The tax year runs July to June, and the residency test is 183 days within it.

A resident individual is one present in Pakistan for 183 days or more in the tax year, and that year ends on 30 June. Someone arriving in, say, March can cross the threshold in a way a calendar-year mental model does not predict — and residence brings worldwide income into charge, not just Pakistani earnings. Both the first year and the departure year need actual day counting rather than an assumption.

Source: Federal Board of Revenue

Filer status is a transactional discount, not a virtue signal, and registration alone does not earn it.

The Active Taxpayers List is the operative document. Non-filers pay materially higher withholding on property purchases, vehicle registration, dividends and certain banking transactions. Obtaining an NTN does not put you on the list — filing your return by the due date does, and a late filer is admitted only after paying a surcharge. Because the list is rebuilt weekly, status can lapse. For anyone buying a car or a flat here, this single mechanism is worth more than any deduction.

Source: Federal Board of Revenue

Sales tax on services is Sindh's, not the FBR's, and that changes who your adviser needs to be.

Pakistan's provinces levy sales tax on services separately, and in Karachi the Sindh Revenue Board administers it with its own registration, its own returns and its own rates. A service business here files federally for income tax and provincially for sales tax on services. An adviser who is excellent on FBR matters is not automatically registered or fluent with SRB, and the two are genuinely separate practices.

Source: Sindh Revenue Board

IT and IT-enabled services exports are taxed under a concessional regime, and its terms keep moving.

Pakistan taxes export earnings from IT and IT-enabled services on a concessional basis rather than at ordinary rates, which is a substantial part of why the sector has grown as it has. The concession has been repeatedly extended, repriced and re-scoped through successive Finance Acts. Anyone structuring income around it should confirm the current position with the FBR directly rather than relying on a figure from a blog, because this is exactly the kind of provision that is true for years and then is not.

Source: Federal Board of Revenue