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The short answer
If you live in a country that taxes residents on worldwide income and you left Nigerian rent, interest or dividends off your returns, most tax offices run a formal route to correct it, and coming forward before they contact you usually cuts penalties sharply. In Canada an unprompted disclosure can get 75% of interest and 100% of penalties waived; in the UK you use HMRC's Worldwide Disclosure Facility; US residents who were not wilful can use the IRS Streamlined procedures.
Many Nigerians abroad keep a flat in Lagos, a fixed deposit at home or shares bought years ago, and only later learn that their new country expected that income on the return. The good news is that this is one of the most common problems tax offices deal with, and each has a set procedure for it. The bad news is that the cost of waiting rises: once the tax office writes to you first, the relief on offer shrinks.
Why tax offices abroad care about Nigerian income
The UK, Canada, the US and most other countries where Nigerians settle tax their residents on income from anywhere. Rent from a Lagos tenant, interest on a naira deposit, dividends from an NGX-listed bank and gains on Nigerian shares all count, even if the money never left Nigeria and even if Nigerian withholding tax was already taken. Withholding tax paid in Nigeria does not make the income disappear abroad; it usually becomes a credit against the foreign tax on the same income (see claiming credit for Nigerian tax).
Tax offices also receive more information than before. Whether and how Nigeria exchanges account data is covered in does Nigeria share your bank details; the safe assumption is that undeclared income can come to light.
The three main routes
UK: the Worldwide Disclosure Facility
HMRC's Worldwide Disclosure Facility (WDF) is for tax owed on offshore income or assets. GOV.UK (updated April 2026) sets out the process:
- Notify HMRC through the Digital Disclosure Service. You receive a disclosure reference number and a payment reference number.
- You then have 90 days to make the full disclosure; you can ask the Offshore Disclosure Facility for more time, up to 180 days in total.
- The disclosure covers tax years up to 2024-25. Outstanding returns from 2022-23 onwards are filed separately as normal returns.
- You state the maximum value of your overseas assets in the last five years in sterling, choose the behaviour that applies to you (from seven options, each with a set number of years to cover), and calculate the penalty yourself using HMRC's factsheets.
- You pay when you submit. HMRC acknowledges within 15 days and aims to confirm within 90 days.
If HMRC has already sent you a letter about overseas assets and you owe tax, GOV.UK says you must use the WDF. If you are under an enquiry, you deal with the investigating officer instead. Disclosures covering more than 20 years cannot go through the online service.
Canada: the Voluntary Disclosures Program
The CRA revised its Voluntary Disclosures Program (VDP) for applications received from 1 October 2025. Under the new rules:
- Unprompted disclosures (made before the CRA contacts you) get general relief: 75% of interest and 100% of penalties waived.
- Prompted disclosures (after a CRA communication such as an education letter) are now accepted but get partial relief: 25% of interest and up to 100% of penalties.
- Cases already under audit or investigation, and egregious non-compliance, are restricted.
- For foreign-source income and assets you give the most recent 10 years; the CRA may ask about earlier years.
Unreported Nigerian assets can also mean a missed T1135 foreign property form; the CRA's T1135 guidance says the VDP may be available for that too.
US: the Streamlined procedures
For US residents, the IRS Streamlined Domestic Offshore procedure (page reviewed July 2026) applies if your failure was non-wilful, you filed returns for the last three years and you do not meet the non-residency test. You file amended returns (Form 1040-X) for three years and FBARs for six years, certify on Form 14654, and pay a 5% miscellaneous offshore penalty on the highest year-end aggregate balance of the affected foreign assets. The IRS has set no end date. Wilful cases fall outside this route and need professional advice.
Why going first matters: a worked example
Example only, using the CRA's published relief levels. Suppose a Toronto resident failed to report Lagos rent and the reassessment shows tax of C$4,000, interest of C$800 and penalties of C$1,000.
| Unprompted | Prompted (best case) | |
|---|---|---|
| Tax | C$4,000 | C$4,000 |
| Interest | C$200 (75% waived) | C$600 (25% waived) |
| Penalties | C$0 (100% waived) | C$0 to C$1,000 |
| Total | C$4,200 | C$4,600 to C$5,600 |
The tax itself never goes away; what changes is everything on top of it. In the US example terms, a highest year-end Nigerian balance of $30,000 would carry a Streamlined penalty of $1,500 (5%), usually far less than penalties outside the programme.
Steps to put it right
- List every Nigerian source: rent, deposit interest, T-bills, dividends, share sales, business income.
- Gather evidence year by year: tenancy agreements, bank statements, withholding tax receipts, broker contract notes.
- Convert each amount into your home currency on a consistent basis (see which exchange rate to use).
- Work out the credit for Nigerian tax already paid; it often reduces what you owe abroad substantially.
- Choose the right route for your country and do not wait for a letter.
- From now on, keep records each year (see records to keep).
Where Pryme fits
Disclosure is easier when the Nigerian side is documented. A Pryme account, opened from any country, keeps naira separate from your other currencies, and any customer can generate a verifiable statement through our partnership with VerifyDoc.ai (verifiable receipts and statements), which anyone can check is genuine and unaltered.
Questions people ask
Will I go to prison for not declaring Nigerian rent abroad?
Disclosure routes exist so that people who come forward settle the tax, interest and any penalty. Criminal cases generally involve deliberate concealment. If that applies, take professional advice before you disclose.
Do I have to declare Nigerian income if tax was already deducted in Nigeria?
Usually yes, if your country taxes residents on worldwide income. The Nigerian withholding tax normally becomes a credit against the foreign tax on the same income rather than removing it.
How many years back do I have to go?
It depends on the country and your behaviour. The CRA asks for 10 years of foreign income; HMRC's WDF sets years by behaviour category; the IRS Streamlined procedure covers three years of returns and six of FBARs.
What if the tax office already wrote to me?
In Canada a prompted disclosure is still accepted with less relief. In the UK, GOV.UK says you must use the WDF if HMRC wrote about overseas assets and you owe tax. Reply within the deadline in the letter.
Sources
- GOV.UK: Worldwide Disclosure Facility, make a disclosure · accessed Oct 2026
- CRA: Changes to the Voluntary Disclosures Program · accessed Oct 2026
- IRS: U.S. taxpayers residing in the United States (Streamlined Domestic Offshore) · accessed Oct 2026
- CRA: T1135 questions and answers · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.