IESCORead the readings, units and charges on your bill
IESCOBillDesk · Reviewed 28 October 2026
Start with the billing period and meter readings, then review current charges and any earlier balance. The total alone cannot explain a change in your monthly cost.
Check these fields in order
| Field | What to check |
|---|---|
| Consumer details | Name, service address and account identifier match your connection. |
| Billing period | The month and reading dates cover the period you expect. |
| Meter readings | Current and previous readings support the recorded consumption. |
| Units | Compare usage with a similar month, not only the previous month. |
| Arrears | Check any earlier balance against your payment receipts. |
| Due date | Read the amounts payable before and after the deadline. |
Why the total can change
More appliance use can raise consumption. A different billing period, tariff category, fixed charge, tax or adjustment can also affect the total. Compare the relevant lines before deciding that a reading is wrong.
If a paid amount appears again
Keep the previous paid bill or bank receipt. Compare the reference number and transaction date. The company’s billing FAQs direct customers with incorrect arrears to their subdivision or customer service centre.
Ask for a specific correction
Describe the exact line, reading or payment that needs review. Keep a copy of the bill and supporting receipt. Do not treat a payment screenshot from an unknown sender as proof that your account is clear. Check the transaction through your own bank or payment provider.
Work through one billing period at a time
Compare the issue month, reading dates and payment deadline before comparing amounts. Two records saved in the same calendar month may relate to different billing periods. For a meaningful comparison, keep the full previous bill beside the current one and compare the same fields rather than screenshots showing only totals.
A simple consumption example
If the previous reading is 12,450 and the current reading is 12,610, the difference is 160 units. This is an illustration of subtraction, not a complete billing calculation. Meter multipliers, replacements or other recorded circumstances can affect how consumption is shown. If the displayed units do not follow the simple difference, ask the supplier to explain the relevant meter record.
Separate usage from adjustments
An energy charge relates to billed consumption, while an arrears entry concerns an earlier balance. Adjustments can refer to another period. Read the description alongside each amount before treating the entire total as the price of this month’s units. Record the line and period you do not understand so the customer centre can investigate a specific question.
Prepare evidence for a reading dispute
Note the current and previous readings printed on the bill, the reading date and the meter serial number. If a reading is safely visible without opening or touching equipment, keep a dated photograph for your own records. Do not open a meter enclosure, break a seal or approach exposed wiring. Ask the supplier how to submit supporting evidence.
Frequently asked questions
Should I subtract a disputed amount myself?
Do not assume that a personal calculation changes the official amount due. Ask the supplier to confirm the correction and explain what amount and deadline apply while it reviews the issue. Save the response together with the complaint acknowledgement.
Are units and the payable amount the same thing?
No. Units describe consumption. The payable total can also include fixed charges, taxes, balances and adjustments.
What does an arrears entry mean?
It represents an earlier balance on the billing record. Compare it with earlier bills and receipts if you believe the amount has already been paid.
Why are there two payable amounts?
Read their labels carefully. A bill may distinguish amounts before and after the due date. Use the applicable date and supplier instructions.
Can a meter replacement affect my comparison?
It can change the readings or supporting entries shown. Ask the supplier to explain the replacement record before comparing the figures as one continuous meter.