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The short answer
There is no US limit on how much cash you can carry, but if you take more than USD 10,000 in total out of the US at one time you must file FinCEN Form 105 when you depart. On arrival in Nigeria, the CBN's 2026 FX rules require any amount above USD 10,000 or its equivalent to be declared at the point of entry, and Nigeria Customs says undeclared sums can be seized.
Carrying cash home for a wedding, a burial or a building project is still common, and so are seizures at airports when travellers do not declare. The rules are not complicated, but they apply at both ends of the flight, and the US one catches people who think it only matters on the way in.
Leaving the US: FinCEN Form 105
FinCEN Form 105, the Report of International Transportation of Currency or Monetary Instruments, says each person who physically transports currency or monetary instruments in an aggregate amount exceeding USD 10,000 at one time from or into the United States must file. Travellers file at the time of departure from, or entry into, the US.
- What counts: US or foreign coin and currency, traveller's cheques in any form, and certain bearer negotiable instruments.
- Aggregate: the total you carry at one time, not each envelope or each currency separately.
- Reporting, not a ban: filing does not stop you carrying the money.
- Penalties: the form warns of civil and criminal penalties, including in certain cases a fine of up to USD 500,000, and that undeclared currency may be seized and forfeited.
The form puts the duty on each person who transports the money, so each traveller should add up what they carry. Splitting cash between family members to stay under USD 10,000 is a bad idea: it defeats the purpose of the rule and draws exactly the attention you want to avoid.
Arriving in Nigeria: declaration on entry
Reports on the CBN's new foreign exchange rules in June 2026 say any amount above USD 10,000 or its equivalent in other foreign currencies must be declared at the point of entry; TheCable reported that the declaration is made on Form TM. Nigeria Customs officers at Lagos airport said in July 2025 that foreign currency, precious metals and negotiable instruments above USD 10,000 must be declared on arrival or departure without exception, and that undeclared funds may be seized, with possible prosecution.
| Point | US side | Nigeria side |
|---|---|---|
| Threshold | Over USD 10,000 in total at one time | Above USD 10,000 or equivalent |
| What to do | File FinCEN Form 105 on departure | Declare at the point of entry (reported as Form TM) |
| Is it a limit? | No, reporting only | No, declaration required above the threshold |
| Risk if undeclared | Penalties; seizure and forfeiture | Seizure; possible prosecution |
A worked example
Example only. Bola flies from Houston to Lagos with USD 14,000 in cash for a family event. Because she carries more than USD 10,000 at one time, she files FinCEN Form 105 when she departs the US, and declares the full amount at the point of entry in Lagos. If she and her husband had split the cash between them, how the rules aggregate amounts for travellers together can be read in more than one way; the cautious course is to ask CBP before departure and to declare in Lagos whenever the family total is above USD 10,000. A declared amount is far easier to explain than a seized one.
Cash or a transfer?
Before packing envelopes, ask whether the money needs to travel as cash at all. Cash is useful for small, immediate spending on arrival; for larger sums it brings the reporting at both airports, the risk of loss or theft, and the work of exchanging or depositing it later. A transfer to a naira or dollar account in Nigeria before you fly, or a balance you can convert when you land, leaves a record and nothing to declare. Many travellers carry a modest amount of cash for the first days and move the rest electronically.
After you land
Keep your declaration documents. If you plan to deposit the dollars, banks such as GTBank list cash among the accepted inflows to a domiciliary account, and your Nigerian bank may ask where the cash came from; the declaration is your evidence. Cash also carries risks no form covers: theft, loss and the cost of exchanging small or old notes.
What to check first
- Add up everything each traveller carries, in every currency and in traveller's cheques.
- If anyone's total is over USD 10,000, file FinCEN Form 105 on departure.
- Declare on arrival in Nigeria if above USD 10,000 or equivalent, and keep the paperwork.
- Ask whether a transfer would do the same job without the risk of carrying cash.
For the reverse trip, see taking naira cash out of Nigeria to the US. For moving larger sums by transfer instead, see sending over USD 10,000 to Nigeria.
Where Pryme fits
If the cash is for spending in Nigeria, holding USD in a Pryme account and converting to naira with Swap when you land avoids carrying it; the app shows the rate and the fee before you approve. See how the account is secured, including authenticator-app sign-in.
Questions people ask
How much cash can I take from the US to Nigeria?
There is no US limit, but over USD 10,000 in total at one time you must file FinCEN Form 105 on departure. Nigeria requires declaration above USD 10,000 on arrival.
Is the $10,000 threshold per person or per family?
FinCEN Form 105 puts the duty on each person who transports the money. Do not split cash between travellers to avoid reporting; ask CBP if unsure.
Do I need to declare dollars at Lagos airport?
Yes, above USD 10,000 or its equivalent. Reports on the CBN's 2026 FX rules say it is declared at the point of entry, reportedly on Form TM.
What happens if I do not file FinCEN 105?
The form warns of civil and criminal penalties, including fines of up to USD 500,000 in certain cases, and that the money may be seized and forfeited.
Sources
- FinCEN Form 105, Report of International Transportation of Currency or Monetary Instruments (rev. July 2017) · accessed Oct 2026
- New FX guidelines: CBN allows $10,000 cash without declaration, up to $50,000 with exit declaration, The Nigeria Lawyer (5 Jun 2026) · accessed Oct 2026
- $10k for cross-border movement, hefty fines: 7 things to know about CBN's new FX manual, TheCable (3 Jun 2026) · accessed Oct 2026
- Customs sensitises airport stakeholders to currency declaration, Peoples Gazette (9 Jul 2025) · accessed Oct 2026
- Domiciliary accounts, GTBank · accessed Oct 2026
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