IESCOFind the tariff that applies to your connection
IESCOBillDesk · Reviewed 28 October 2026
There is no single final price for every electricity unit. Start with the tariff category printed on your bill, then check the official tariff schedule.
Match the category first
Residential, commercial and other connections can have different rules. Residential schedules may distinguish lifeline, protected and unprotected consumers. A time of use connection can show separate peak and off peak consumption.
Read the conditions in the current schedule before applying a rate to your own units. Do not decide your category from this month’s consumption alone. A short online estimate may leave out conditions that affect the account.
Separate consumption from the final total
Energy charges are only part of the amount payable. Read fixed charges, taxes, arrears and adjustments separately. Check both the billing period and any effective date on a tariff notice. An older table may not apply to the period on your bill.
Use an estimate with care
The official company website provides customer tools and tariff notices. Any calculation depends on the information you enter and the charges it includes. The issued bill remains the account record to review before payment.
If the category looks wrong
Compare the tariff code with an earlier bill. Contact the subdivision or customer centre if it has changed unexpectedly. Keep the relevant bills and ask which category and effective date the provider used. This site does not set electricity prices or certify the amount due.
Build a comparison from the bill itself
Write down the tariff code, connection category, billing period and recorded units. If the bill separates peak and off-peak consumption, keep those figures separate. Match these details with the schedule for the relevant period before attempting a calculation. A table for a different category can produce a convincing but incorrect estimate.
Why a single per-unit figure can mislead
Dividing the grand total by the number of units combines consumption charges with other entries. Arrears, taxes, fixed charges and adjustments can change that average. It does not necessarily represent the tariff rate used for energy. Compare the energy line separately, then review each additional component.
Compare two months fairly
Check whether the number of days between readings changed and whether the same tariff code appears on both bills. Note changes in consumption and any new adjustment line. A higher total can have more than one cause, so avoid attributing the whole difference to a tariff change without checking the itemised record.
When to ask for a category review
If the tariff code seems inconsistent with the connection, compare it with earlier bills and ask the supplier to explain the classification. Describe the actual use of the premises accurately. A category change is an account process; an online estimate cannot authorise it or decide when it should take effect.
Frequently asked questions
Does this guide publish current unit prices?
No live rate table is maintained here. Use the supplier’s current published schedule for the period on your bill. This avoids presenting an old rate as if it applied to every customer and month.
Can I multiply units by one rate to get the final bill?
That may leave out category rules and other charges. Check the applicable schedule and review each additional bill line separately.
Where is my tariff category shown?
Look for the tariff or category field on the issued bill. Ask the supplier to explain an unfamiliar code.
Does low consumption always determine protected status?
Do not infer eligibility from a single month. The applicable schedule and account history can contain additional conditions.
Are old tariff tables reliable for a new bill?
Use the schedule that applies to the billing period. An older table may have different rates or conditions.