If a bill rose without your usage rising, the fuel cost adjustment is the most likely reason. It is a per-unit amount that changes every month, it is set nationally rather than by your distribution company, and it is the single biggest reason two months with identical units can produce different bills.
What the FCA is
The Fuel Cost Adjustment — also written as Fuel Price Adjustment, FPA — reconciles the fuel cost assumed in your base tariff against what generating the electricity actually cost. Run higher than assumed, and a positive FCA is added to every unit. Run lower, and it comes back as a credit.
Because it is calculated after the fact, there is a lag of roughly two months between the month being reconciled and the bill that carries it. That is why an adjustment described as being “for May” turns up on a July bill, which confuses a lot of people looking for a charge that matches the month printed at the top of the page.
It is not the only thing moving
Through June, July and August 2026 the FCA ran alongside a negative quarterly tariff adjustment of Rs 1.9857 per unit, notified in S.R.O. 953(I)/2026 of 8 June 2026.
The two work in opposite directions. The quarterly adjustment is a credit; the FCA is usually a charge. What lands on your bill is the net, and then GST is calculated on the result — which is why the relief felt smaller than the headline figure suggested, and why a bill can rise in a month you were told rates were falling.
The relief expires after the August 2026 billing month. From September the offset disappears, so an FCA of the same size will show up more visibly. Our guide to the Rs 1.9857 relief covers that side, and the tariff page tracks both against the base schedule.
Where the FCA sits relative to everything else
The FCA is applied per unit, on top of the energy charge, and before tax. It is separate from your slab rate, from the fixed charge tied to your sanctioned load, and from the duty and GST lines below it.
Worth knowing: because GST is calculated on a subtotal that includes the FCA, a rise in the fuel adjustment increases your tax as well as your energy cost. The visible effect on the total is larger than the per-unit figure alone suggests. Our guide to slabs, FPA and taxes walks through how the layers stack.
How to check what you were actually charged
Do not rely on a headline number from a news report — the figure changes monthly, and what matters is the one on your bill. Find the FCA or FPA line in the charges column and divide it by your units for the per-unit amount you paid.
Check your bill with your reference number, free and with no sign-up. If the units themselves look wrong rather than the charges, that is a meter-reading question for your distribution company — each of our company pages lists its own complaint route.
What you can actually do about it
Very little directly: the FCA is notified centrally and no distribution company can waive it. What you can control is the number of units it is multiplied by. Since the adjustment is charged per unit, cutting usage cuts the FCA proportionally — and if you are near a slab boundary, the saving compounds, because crossing a band reprices the whole month for unprotected consumers.
Roman Urdu: khulasa
FCA (fuel cost adjustment) har mahine badalti hai aur bijli banane ki asal lagat ke hisab se lagti hai. Ye tehreeri tor par do mahine peeche ki lagat par hoti hai, isi liye “May” wali adjustment July ke bill par aati hai. June se August 2026 tak sath hi Rs 1.9857 fi unit ki relief bhi chal rahi thi, jo FCA ka asar kam kar rahi thi — lekin August ke baad wo relief khatam ho jati hai. Apne bill par FCA ki line dekh kar apne units se taqseem karein, asal figure wahi hai.