Computing annual tax when you have more than one income
A single-head calculator answers a narrow question. Once you have income from more than one source, the difficulty is not arithmetic — it is knowing what gets added to what, in which order, and what stays outside the aggregate entirely.
The heads, and their own rules
| Head | Computed as |
|---|---|
| Salary | Cash pay plus valued benefits, less applicable exemption |
| Income from property | Rent less the prescribed deductions, including the standard repairs allowance — the property head |
| Income from business | Accounting profit adjusted for tax depreciation, inadmissible expenses and provisions — business computation |
| Capital gains | Consideration less cost, with rates depending on the asset and holding position |
| Income from other sources | Residual category — includes certain receipts not falling elsewhere |
Each is computed to a net figure under its own rules before anything is aggregated. Adding gross receipts across heads and applying one table is the most common error in a multi-source computation.
The order of operations
- Compute each head separately to its own net figure.
- Identify income under a separate or final regime and set it aside — it is generally settled on its own basis rather than pooled.
- Apply loss set-off where the rules permit it, head by head.
- Aggregate what remains into taxable income.
- Deduct any deductible allowances that reduce income.
- Apply the correct rate schedule. Which schedule applies depends on the composition of your income, particularly whether it is predominantly salary.
- Apply tax credits — these reduce the tax figure, not the income.
- Deduct tax already paid — withholding and advance tax, matched to certificates and FBR records.
- Arrive at the balance payable or refundable.
You draw a salary, tax is deducted at source every month, and you want the return filed properly without spending a weekend inside IRIS.
Which schedule applies
Pakistan runs two main progressive schedules for individuals, and they are far apart:
- The salary schedule starts at 1% above Rs 600,000 and reaches 35% above Rs 7,000,000.
- The business schedule starts at 15% above Rs 600,000 and reaches 45% above Rs 5,600,000, with the section 4AB surcharge at 10% of tax computed above Rs 10 million of taxable income.
For someone with both, which schedule governs depends on the composition of their income. That determination has real consequences — the same total income can produce very different tax depending on the mix — so it should be established rather than assumed. See marginal versus effective rates for the size of the gap.
Illustrative sequence
A taxpayer with Rs 2,400,000 of salary, Rs 900,000 of gross rent and Rs 300,000 of bank profit:
| Step | Treatment |
|---|---|
| Salary | Rs 2,400,000 after benefit valuation |
| Property | Rs 900,000 less the standard repairs allowance and other allowable deductions |
| Bank profit | Set aside if under a final regime; otherwise included per its treatment |
| Aggregate | Salary plus net property income, once the regime for each is established |
| Rate schedule | Determined by income composition |
| Credits and withholding | Applied to the computed tax, matched to certificates |
Note the two judgement calls: the regime applicable to the bank profit, and the schedule applicable to the aggregate. Neither is arithmetic, and both change the answer materially.
Foreign income in the mix
A resident is generally chargeable on worldwide income, which brings foreign salary, business profit and investment returns into the computation. Three things then arise:
- Conversion. Foreign amounts have to be converted on a consistent and documented basis, and the rate used should be recorded rather than reconstructed.
- Foreign tax credit. Where tax was paid abroad on the same income, relief may be available — but it is claimed with evidence of the foreign tax actually paid, and it is a credit against Pakistani tax rather than a deduction from income. See foreign tax credit.
- Foreign assets. The assets generating that income are separately declarable where the requirement applies, and information exchange makes them visible independently — foreign assets.
For a non-resident the position is narrower — Pakistan-source income only — but residence is tested annually on a day count, so it is not a settled attribute. Establish it for the year before computing anything, because it determines the scope of the whole exercise.
The step people forget
Multi-head taxpayers usually get the income section broadly right and fail on the wealth statement. Several income streams mean several asset movements — a property, a deposit, a business capital account — and the bridge from opening to closing net assets has to absorb all of them. That is where multi-source returns actually break. See the tracing method.
Sources
This guide is written against the official and clearly labelled professional references below. Rates, thresholds and portal procedures change between reviews, so open the primary source before relying on a figure.
Questions people also ask
I have salary and rental income. Do I just add them and use the salary slabs?
No. Each head is computed under its own rules first — rental income after its allowable deductions, salary after benefit valuation — and how they then interact depends on the composition of your total income. There are rules addressing taxpayers whose income is predominantly salary versus predominantly not, and they affect which schedule applies. Do not merge the figures and pick one table.
Which income stays outside the aggregate?
Income under a final tax regime is generally computed and settled separately rather than being pooled with your other income. Certain capital gains and specified receipts also follow their own schedules. The practical effect is that your taxable income for slab purposes is not the sum of everything you received, which surprises people the first time they see a computation.
Where do tax credits come in?
After the tax on income has been computed, not as deductions from income. That ordering matters: a credit reduces the tax figure, whereas a deductible allowance reduces the income the tax is computed on. Mixing them up produces the wrong answer in both directions.
Can a loss under one head reduce income under another?
Sometimes, and it is restricted. Set-off and carry-forward rules differ by head, and a loss does not move freely across your whole position. A business loss, a property loss and a capital loss each follow their own rules, so a loss position needs working through against the applicable provisions rather than netted intuitively.
Do I need a professional for a multi-head computation?
For salary plus a small amount of bank profit, probably not. Once you have business income, property, capital gains or foreign income in the same year — particularly with losses, credits or a final tax stream — the interactions are where errors arise, and those errors surface in the wealth statement rather than in the income section. That is the point at which review pays for itself.
Send the tax year and the transaction or filing involved, and we will tell you what is actually required.
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