How to Change the Date of Birth on Your NIN (2026)

A date-of-birth modification on a Nigerian NIN is not a portal exercise. It is a legal exercise that finishes with a portal payment. The actual difficulty of the change sits in the affidavit and in the NPC certificate; everything you do on selfservicemodification.nimc.gov.ng is the procedural confirmation of work the court and the National Population Commission have already done. Treat the chain as court affidavit → NPC corrected/attested birth certificate → NIMC self-service portal submission, and budget your time and money accordingly.

NIMC charges ₦28,574, non-refundable, for the portal step alone. The court affidavit costs a few thousand naira at a High Court registry. The NPC certificate or attestation costs another few thousand at the state NPC office. None of those upstream costs reach NIMC. They are the price of producing the documents NIMC will then accept.

The passport-side half of this chain is at how to change the date of birth on a Nigerian passport. Read it before you start if a passport re-issue is also in your future; the affidavit you swear here is the same affidavit NIS will accept.

The legal-stack route is for cases where your official records are wrong, not where you mistyped a value somewhere.

• The original NPC birth registration was wrong, or no registration ever happened. Common for those born in rural areas before universal registration, where day and month were transposed at the registry, or where a parent's literacy gap led to an erroneous entry.
• The NIN was rushed through the SIM-linkage drive with a wrong DOB that no longer matches your school, family, or NPC records. The NIMC capture is the outlier; the legal stack realigns it to the truth.

It does not apply to:

• A typo on a passport form when your NIN is right. That is a passport-side mismatch and is corrected through NIS support for no fee. See date of birth mismatch on passport application for the lighter route.
• A strategic DOB change for retirement, statutory office age limits, or insurance benefit. Nigerian High Courts will refuse to swear an affidavit for these motives. The court process is grounded in actual documentary evidence of the correct DOB; convenience does not pass review.

The affidavit is the legal backbone of every later document. Without it, NPC will not attest, NIMC will not modify, and NIS will not re-issue.

• Which court. A Federal or State High Court, not a magistrate's court. A magistrate-court affidavit will be rejected by NIMC review.
• Who swears. You, if you are an adult with the capacity. A parent or older sibling (at least eight years older), where the applicant is a minor or otherwise unable. The deponent provides their own ID, two passport photographs, and the affidavit fee.
• What it states. Full name, the date and place of birth you are declaring to be correct, parents' names and occupations at the time of birth, local government of birth, and a statement explaining why the original record is wrong with reference to the supporting documents (school records, family Bible or Quran entries, baptism records, older NPC entries).
• Cost. A few hundred to a few thousand naira at the registry, depending on the state. Lagos, Abuja, and Port Harcourt registries sit at the higher end.

The mechanics of swearing an affidavit are common across Nigerian civil-document processes. The detailed treatment lives in our affidavit guide; the version you swear for a NIN DOB correction follows the same template with the DOB declaration as its content.

The National Population Commission handles the civil-record side. Two sub-routes apply depending on when you were born.

The digitalised certificate is what NIMC accepts. A laminated paper certificate from twenty years ago, even if it shows the correct DOB, is not the right artefact for the portal upload. If you hold an older paper certificate, take it to NPC and request the digitalised version.

The portal step is the smallest part of the chain. The work is in the documents you upload, not the navigation.

1. 1
   Sign in from your original deviceOpen [selfservicemodification.nimc.gov.ng](https://selfservicemodification.nimc.gov.ng/) on the browser and device you registered the account with. Verify this access before paying — the next step is irreversible on the money side.
2. 2
   Select DOB modificationOn the dashboard, choose the modification flow and select 'Date of Birth'. The portal displays the current DOB on file and asks for the corrected value.
3. 3
   Upload the document bundleUpload the digitalised NPC birth certificate or attestation certificate, the court-sworn affidavit, and any supporting documents (school records, older family records). PDFs or clear photographs accepted. Triple-check legibility before submitting.
4. 4
   Pay ₦28,574Through Paystack on the portal. The fee is non-refundable from the moment payment clears. NIMC's review begins on the cleared payment, not on the document upload alone.
5. 5
   Wait two to six weeksNIMC review for DOB modifications is slower than for name corrections. A reviewer may request additional evidence — respond within the requested window to keep the case alive. Where the case is approved, NIMC updates the live record and notifies you by email.
6. 6
   Download the corrected slipGenerate a fresh slip from the portal after the change is reflected. See [how to download and print your NIN slip](/nin/how-to-download-and-print-nin-slip/) for the slip-download mechanics. The old slip is no longer current.

The ₦28,574 is the highest single charge in the entire NIN modification stack and the only one explicitly marked non-refundable on the portal. The implications are not subtle.

• NIMC keeps the fee even on rejection. A blurred NPC certificate scan, a magistrate-court affidavit where a High Court was required, a discrepancy between the affidavit and the certificate — any of these can cause a rejection. The ₦28,574 stays with NIMC regardless. A second attempt with a corrected bundle is a fresh ₦28,574 in full.
• A device-locked portal sign-in is a real risk before payment. NIMC tightened self-service portal access to the original registration browser-and-device pair in August 2025. If you cannot sign in cleanly today, sort that out before paying. Losing your sign-in mid-submission can mean ₦28,574 plus court fees plus NPC fees on a record you cannot then check or amend on your own.
• One submission cycle per attempt. The portal does not let you edit a submission mid-review. If the document bundle was wrong, the only fix is to wait for the rejection, gather the corrected documents, and pay again.

Treat the fee as the price of certainty rather than as a refundable deposit. The reason to spend a week getting the bundle airtight before paying is that the cost of getting it wrong is ₦28,574 every time, not a few hundred naira in admin churn.

In-person review at a Commissioner for Oaths before you swear the affidavit is the cheap insurance step. A registry that has issued a thousand of these affidavits will spot the missing local-government-of-birth or the parent's-occupation-omitted before you pay anyone anything.

A reader correcting a DOB sometimes discovers the name on the NIN also drifted at the original enrolment. Order matters here.

• Submit the DOB first. It is the longer, costlier, more document-intensive modification. Once it clears, the corrected slip is the anchor for any later checks. The name correction route uses a lighter bundle that is straightforward once the DOB is settled.
• Do not submit DOB and name in the same portal session. NIMC processes each modification field through its own review queue. A DOB submission with an unrelated name change attached creates a confused review and slows both. Pay for one, see it clear, then submit the next.

Other lighter modifications — address, phone, email — fit the same logic. The DOB modification is the gate; everything else follows behind. NIMC review queues for DOB tend to run longer in months with public holidays clustered (Easter, Eid, Christmas–New Year); plan around them where you can.

A DOB correction is the modification with the largest downstream tail. Once NIMC issues the corrected slip, several systems need re-verification.

• Passport. A Nigerian passport does not auto-update from a NIN correction. The NIS treats the new DOB as a change-of-data re-issue. The full walkthrough is at how to change the date of birth on a Nigerian passport. If a passport application is already in flight and stalled at the DOB step, see date of birth mismatch on passport application for keeping the file alive while NIMC processes the change.
• Bank KYC and BVN. Banks pull DOB from NIMC for KYC. After the NIMC correction propagates (24 to 72 hours after the new slip is issued), banks refresh their cached value. Where a bank still shows the old DOB after a week, open a verifier-side ticket with the corrected slip attached.
• NYSC, JAMB, WAEC certificates. Each examining body has its own correction process. The NIMC modification is the canonical source for each subsequent request; bring the corrected slip.
• Driver's licence and tax. FRSC and FIRS each take the corrected NIN as the basis for their own field updates.

A DOB shift that crosses a statutory threshold (retirement age, pension eligibility, age-limited public office) attracts additional scrutiny downstream — NIS, FRSC, and pension administrators sometimes ask for supporting evidence beyond the corrected NIN slip. Comply openly; refusing to provide evidence reads as a flag.