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FPA / FCA Explained — The Fuel Adjustment
The line that makes two identical months cost different amounts. It has one job: truing up the gap between the fuel cost built into the base tariff and the fuel cost that actually occurred.
The mechanism
The base tariff assumes a reference fuel cost per unit. Each month, the power purchaser totals what generation actually cost; NEPRA compares the two, and the difference — positive or negative — becomes the fuel charges adjustment (FCA), charged per unit on the units of the month the fuel was burned. November 2026's figure is a clean example: September's actual cost came in at Rs 9.8268 per unit against a reference of Rs 7.4596 — a gap of +Rs 2.3673, notified as S.R.O. 2094(I)/2026 on 6 November 2026.
Why it arrives two months late
The fuel month's costs must be compiled, petitioned, heard and decided — a process that runs through the following month and lands on bills the month after. So the bill in your hand carries the fuel story of two months ago: November bills carry September's FCA; October bills carried August's (+Rs 1.1086). Two practical consequences follow. First, a spike in fuel prices reaches your bill long after the headlines fade. Second, the adjustment is charged on the fuel month's units — if your usage was higher then, the FCA line is bigger than this month's usage suggests. Your bill names its fuel month; the tracker keeps the decided series.
Who is exempt, and what it is not
Lifeline consumers, prepaid consumers and EV charging stations do not pay the FCA — everyone else does, including protected consumers (a point many guides miss). It is uniform across the ex-WAPDA companies and K-Electric. It is not a tax: GST is charged on it, which is why a Rs 2.3673 adjustment costs a 300-unit home Rs 838 by the time the bill is totalled. And it can be negative — in refund months the same line reduces the bill; June – August 2026's quarterly line shows the same two-way behaviour at a slower rhythm (QTA explained).
Reading your own line
Divide your bill's FCA amount by the units shown for the fuel month: the result should be the decided rate for that month, to the paisa. If it is not, the bill checker will show the difference with the month named. Watching the series matters more than watching any single month — the FCA is where tariff news becomes bill reality, and it is the line this site's calculators update first.