When people try to check their electricity bill, the same mistakes come up again and again. Avoiding them saves time and helps you spot real errors.
1. Multiplying all units by one rate
Residential tariffs are slab-based, and protected and unprotected consumers have different rates. Multiplying all units by a single "per unit price" from a news report rarely matches the bill.
2. Ignoring protected status
A household using 180 units may expect the protected rate — but if it crossed 200 units in any of the last six months, it is billed as unprotected.
3. Forgetting the reading period
Bills are based on the actual days between readings. A 34-day cycle includes more units than a 30-day cycle.
4. Applying FPA to the wrong month
FPA is usually based on the units of an earlier reference month, not the current month. Using current units gives the wrong figure.
5. Missing fixed charges
Some categories pay a fixed monthly charge based on sanctioned load or maximum demand.
6. Calculating GST on the wrong base
GST applies to the taxable value, which can include adjustments. Calculating it only on the cost of electricity can underestimate it.
7. Using outdated rates
Tariffs, adjustments and taxes change through NEPRA and government decisions. Old rate lists from blogs or social media are often out of date.
8. Including taxes that were removed
Electricity duty and PTV fee were removed from electricity bills in 2025. Older calculators may still add them.
9. Confusing peak and off-peak
TOU meter users must use separate rates for peak and off-peak units.
10. Ignoring arrears and installments
The total payable includes any arrears, installments and deferred amounts.
A better method
- Start with units from your meter.
- Confirm your category.
- Use the latest official tariff for your slab.
- Add fixed charges, then FPA/QTA.
- Apply taxes.
- Add arrears.
Read our step-by-step guide on calculating your bill from units for a worked example.