There is a number buried in the technical annexures of every PSDP document, waiting for someone to do the arithmetic. Yet, despite its significance, the Planning Commission rarely leads with it. That number is Pakistan's Incremental Capital Output Ratio (ICOR), and what it reveals is a silent indictment of how development spending is managed.

The ICOR refers to how many rupees of capital must an economy deploy to generate one additional rupee of GDP. A low ratio signals productive, efficiently deployed investment. As it climbs, the same developmental output costs enhance progressively.

During Pakistan's growth years in the mid-2010s, when GDP expanded at 5-6% annually, the effective ICOR was roughly 3 to 4. Pakistan's ICOR has since drifted to between 5 and 7. To generate one additional rupee of GDP that once required roughly Rs3 to 4 of capital formation, Pakistan now requires Rs5 to 7.

Pakistan's GDP stands at an estimated Rs120 trillion in FY2025-26. Against this base, the federal PSDP of Rs1 trillion, which was further revised down to Rs837 billion mid-year, represents barely 0.6% of GDP. At an ICOR of 5 to 7, that spending generates at most Rs120-167 billion of additional GDP annually, equivalent to 0.10 to 0.14 percentage points of growth. A country targeting 4-5% annual growth cannot reach that destination on a public investment engine this small and this inefficient.

The Rs1 trillion original PSDP allocation sounds substantial until held against the throw-forward: over Rs10 trillion in costs already committed to projects at various stages of implementation. Pakistan has written cheques it cannot cash for a decade or more.

Project data makes this concrete. The Hyderabad-Sukkur Motorway stands at Rs399 billion on its second cost revision. Dasu Hydropower Stage-I carries an approved cost of........

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