NCC billing integrity benchmarks and overcharge fixes
What the NCC's billing integrity benchmarks expect of a Nigerian operator, and how to correct an overcharged subscriber's account in the books.
By Achekam · · 5 min read · For Telecoms businesses in Nigeria
A subscriber in Ibadan checks her bill and finds she has been charged twice for the same data bundle. Another in Kano notices that his airtime balance dropped after a recharge that did not load. Each complaint is small on its own. Added up across a subscriber base, and set against the Nigerian Communications Commission's benchmarks, they are a measure of how well an operator's billing works, and the NCC treats them that way.
This article explains the NCC's billing integrity benchmarks, including those for value-added services, and then turns to the accounting side: how an overcharge should be corrected so the subscriber, the books and the VAT all agree. The benchmarks quoted are those the NCC publishes at the time of writing; check the NCC's page for the current figures before relying on them.
Billing integrity is a quality-of-service measure
The NCC says it is empowered to set minimum quality of service standards for telecoms operators. Those standards cover technical measures, such as call completion rates, and commercial measures, such as customer care access and billing integrity. The NCC's Quality of Service page sets out the benchmarks and how they are measured.
Putting billing alongside network performance is a useful reminder for finance teams. A bill that is wrong is a service failure, in the same way as a dropped call, and the regulator measures it.
The benchmarks for bills and balances
For mobile operators, the NCC's billing integrity benchmarks are:
| Measure | NCC benchmark |
|---|---|
| Total bills overcharged | Below 0.5% |
| Prepaid accounts with an incorrect credit balance | Below 0.5% |
| Failures of credit balance inquiries | Below 1% |
Three things follow for an operator's billing and finance teams. First, you need to be able to count overcharged bills, which means every overcharge found must be recorded as such, not quietly fixed. Second, prepaid balances need regular checks against what was loaded and used. Third, the balance enquiry service is itself measured: a subscriber who cannot check their balance counts as a failure even if the balance is right.
These benchmarks are stated for mobile operators. If you hold a different kind of licence, check with the NCC which measures apply to you; good billing records help whichever ones do.
Value-added services: multiple billing and recharge errors
The NCC sets separate benchmarks for mobile value-added services. They are below 0.2% for SMS and MMS delivery failures, below 0.2% for SMS and MMS incorrect feedback, below 0.01% for SMS and MMS multiple billing, and below 0.02% for recharge card loading errors.
The tight figure for multiple billing reflects how much subscribers dislike being charged more than once for the same message or service. Value-added services often involve a content partner as well as the operator, so a multiple-billing error can start in either system. Agree with each partner how charges will be reconciled and who corrects an error, before a complaint forces the question.
Billing complaints also land at the customer care centre, which the NCC measures too: it requires every call to a customer care centre to be answered by a person or a machine, with the line never busy, and a repeated announcement at every two-minute interval while a customer waits. A billing error that triggers a wave of calls tests both benchmarks at once.
Correcting an overcharge in the books
Where a subscriber has been invoiced, as business and postpaid customers usually are, an overcharge is corrected with a credit note, not by editing or deleting the original invoice. In Achekam, a credit note is issued from the invoice it corrects, in full or for chosen lines, and posted to the ledger. There is no credit note without an invoice, which keeps every correction tied to the bill that was wrong.
The VAT has to follow the original. When an invoice line states no rate, VAT is taken at the rate in force on the invoice date, and a credit note uses its original invoice's date and tax codes. A Nigerian business picks a tax code on each invoice line (standard, zero-rated, exempt, out of scope or reverse charge), and only standard lines carry VAT, so the credit note reverses exactly the VAT that was charged.
One practical point: issue Nigerian invoices from the invoice form under Accounting, which follows the country's tax codes. The New invoice form under Billing & Finance offers only 15% or 0% VAT and shows rand, so it does not follow Nigerian VAT.
When the subscriber has already paid
If the overcharged invoice has been paid, the credit leaves money in the subscriber's favour. Leftover credit from a credit note is held for the customer, and customer payments can be recorded against one invoice or spread across several, with any extra held on the customer's account. Apply the credit to the next invoice, or refund it if the subscriber prefers.
Record every credit note for an overcharge with a clear reason, such as "duplicate bundle charge" or "rate applied in error". That reason is what lets you count overcharged bills against the NCC's benchmark later.
Showing the subscriber the correction
A subscriber who complained wants to see the fix. The server produces a customer statement of account as a PDF that can be e-mailed, and the screen says whether it was sent. The statement shows the original invoice, the credit note and any payment, so the subscriber can see the overcharge reversed without having to read two separate documents.
Send it with a short note: what went wrong, what was credited, and where the credit has gone. Keep the sent record with the complaint. If the overcharge also affected earlier months, crediting an outage from an earlier month covers dating and approving that kind of credit, and controlling credits and write-offs sets out who should be allowed to issue them.
A monthly billing integrity check
- Count credit notes issued for overcharges and compare them with bills issued.
- Sample prepaid balances against loads and usage.
- Review value-added service charges with each content partner.
- Check that every billing complaint has a credit note or a written reason why none was due.
General guidance only, not advice on your own circumstances. Tax and payroll rules change: check the current position with the authority or your adviser.
