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QTA Explained — The Quarterly Adjustment
The FCA trues up fuel. The QTA trues up almost everything else — capacity payments, transmission and system charges, market fees, loss effects — one quarter at a time, spread over three billing months.
The 2026 windows tell the story
| Billing months | QTA (Rs / unit) | Notification |
|---|---|---|
| March – May 2026 | +0.3504 | S.R.O. 459(I)/2026 |
| June – August 2026 | -1.9857 | S.R.O. 953(I)/2026 |
| September – November 2026 | +0.5194 | S.R.O. 1501(I)/2026 |
Note the middle row: for June – August 2026 the adjustment was a credit of Rs 1.9857 per unit — on a 300-unit bill, nearly Rs 600 back before GST. Quarterly adjustments cut both ways, which is precisely why a calculator holding a stale positive QTA through a credit quarter overstates every bill it touches.
December 2026: a request is not a rate
The next window (December 2026 – February 2027, covering July – September 2026) is, as of this page's verification date, undecided. The companies have requested +Rs 1.34 per unit (Rs 23.326 billion in total) and NEPRA's public hearing is set for 17 November 2026. Some pages already print 1.34 as the December rate. It is not — it is the applicants' number, and NEPRA routinely decides below (and occasionally above) what is sought. This site publishes decisions: the September – November figure of +Rs 0.5194 stays in every calculator until a December decision exists, and the tracker records the status either way.
Exemptions and interactions
Lifeline and prepaid consumers are exempt from the QTA, as are units billed under the incremental consumption package. Everyone else pays it on every unit, and GST is charged on top of it — so the current +0.5194 costs a 500-unit home about Rs 306 all-in. If your bill's QTA rate does not match the window your bill falls in, that is a genuine discrepancy worth raising — the bill checker compares it directly.