Minimum tax on turnover under section 113

Minimum tax is the provision that surprises loss-making businesses: you declared a loss, so you expected no income tax, and then a bill arrives anyway. Section 113 of the Income Tax Ordinance is why. It sets a floor on tax by reference to turnover, so that a business with substantial sales cannot pay nothing simply because its computation shows no taxable profit. This guide explains when it applies, how it is calculated, and how the carry-forward softens the blow.

Why a minimum tax exists

Ordinary income tax is charged on taxable income. A business can reduce taxable income to nil — or to a loss — through genuine expenses, depreciation and brought-forward losses. Section 113 exists because a company turning over billions while consistently declaring no taxable income is either genuinely marginal or is managing its declared profit downward, and the tax system draws a floor under both cases. The floor is turnover: if you sold, you contribute a minimum, regardless of the profit computation.

How the calculation works

The mechanism is a comparison, run every year:

1. Compute normal tax on taxable income in the ordinary way — after expenses, depreciation and loss set-off. For a corporate taxpayer this runs through the corporate income tax rate.
2. Compute section 113 minimum tax as a percentage of turnover for the year.
3. Pay the higher of the two. If normal tax is higher, section 113 is irrelevant. If the turnover figure is higher — the usual case in a loss or low-margin year — the minimum tax is what you pay.

The turnover percentage is set by the Ordinance and the annual Finance Act, with reduced rates for certain sectors that operate on thin margins (fuel dealers, some distributors, and others). Because the headline rate and the sector reductions move, confirm the current figure against the budget salient features and the Ordinance before relying on a percentage.

A worked example

Take a trading company with turnover of Rs 500,000,000 that declares a tax loss for the year.

• Normal tax: nil, because there is no taxable income.
• Minimum tax under section 113: the turnover rate applied to Rs 500,000,000 — a positive figure, say Rs 6,250,000 at an illustrative 1.25%.
• Payable: the higher of the two, so Rs 6,250,000 despite the loss.

Where minimum tax bites, by margin

The crossover sits at the minimum rate divided by the normal rate — 1.25 / 29, or 4.31 per cent — and it is independent of turnover. Any business earning less than that net margin is paying minimum tax whatever its size, which is why high-turnover low-margin trades sit below the line structurally rather than in bad years only. The last row is the one to keep in view: a loss-making business still owes Rs 2,500,000.

The carry-forward, in detail

The excess of minimum tax over normal tax is not refundable, but it is not simply lost either. The Ordinance allows it to be carried forward for a limited number of tax years and adjusted against the amount by which normal tax exceeds minimum tax in those later years. Two disciplines follow. First, record the excess each year — the carry-forward is only claimable if you tracked it. Second, watch the expiry window; carried-forward minimum tax that is not absorbed within the allowed number of years lapses. This is exactly the kind of figure that belongs in a running tax schedule rather than being reconstructed years later.

Interaction with other charges

Section 113 does not stand alone. A company also has to consider whether super tax under section 4C applies to high-income years, and a small company may face different rate mechanics. Minimum tax is computed before those interactions are finalised, and the presence of a statutory audit — required for many companies, as covered in the statutory audit requirement — means the turnover figure the minimum tax rests on is itself audited. Get the turnover number right, because everything in section 113 is built on it.

Recording it so the carry-forward survives

The single administrative failure that costs money here is not tracking the excess. Minimum tax paid in a loss year only becomes useful later if the amount, the year it arose, and the years it can still be claimed are recorded and carried on the tax working papers. A business that pays section 113 tax in year one, forgets it, and returns to profit in year two will simply pay full normal tax in year two and lose the adjustment. Build the carry-forward into the same schedule that tracks brought-forward losses, and review both every year at filing. Where the numbers are large, the interaction between the loss carry-forward and the minimum-tax carry-forward is worth modelling, because using losses to wipe out profit can leave minimum tax as the operative charge again.

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.

• Income Tax Ordinance 2001, updated (FBR)
• Federal Budget 2026-27 salient features (FBR)
• Income Tax Basics (FBR)

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