ChamTax is a free calculator that shows the actual after-tax take-home amount for US Powerball and Mega Millions jackpots. Here's how a US lottery win is taxed for a Nigerian resident — a flat 30% US withholding, plus a real Nigerian tax liability under the Nigeria Tax Act 2025 that ends up fully credited away, for an estimated $0 net additional tax (⚠️ see the caveats below).
Last updated: 2026-09-01
$1,000,000 win, Nigerian resident estimate ⚠️
The calculator above converts your own amount to Naira (NGN) using a live exchange rate.
In principle, yes — Nigerian residents are taxed on worldwide income, and the Nigeria Tax Act (NTA) 2025 (effective 1 January 2026, replacing the old Personal Income Tax Act) raised the top marginal personal income tax rate to 25% on income above ₦50 million, a threshold any jackpot-sized win clears easily (confirmed across KPMG, EY, and other 2025-2026 sources on the reform). ⚠️ Nigeria does have a specific 5% withholding tax on lottery/gaming winnings under the 2024 Withholding Tax Regulations — but that applies to Nigerian-licensed operators paying out to resident bettors, not to a foreign lottery like Powerball with no Nigerian withholding agent in the chain. This calculator hasn't found an explicit ruling confirming the general worldwide-income treatment for a foreign lottery specifically, so it uses Nigeria's top marginal rate as a reasonable, conservative estimate rather than a confirmed statutory citation.
The US taxes nonresident aliens on lottery winnings at a flat 30% federal withholding rate (IRC §871(a)) — withheld immediately when the prize is paid out.
There is no comprehensive US-Nigeria income tax treaty — confirmed across multiple sources (PwC Worldwide Tax Summaries, Freeman Law) rather than assumed, since many other countries this calculator covers do have one. Without a treaty, the 30% US withholding isn't reduced or exempted at source, and there's no treaty article to invoke for a refund.
This is the opposite pattern from countries like the Netherlands or Switzerland, where a treaty exists but doesn't cover lottery winnings, so the US withholding and local tax simply stack with no credit. Nigeria has no treaty at all, but NTA 2025 Section 119 grants unilateral relief from double taxation as a matter of domestic law — letting a Nigerian resident credit foreign tax already paid against their Nigerian liability, treaty or no treaty. The credit is ordinary (capped): limited to the lower of the actual foreign tax paid or the Nigerian tax otherwise due on that income. On a $1,000,000 win, the US withholds $300,000 (30%) while Nigeria's top-rate liability is $250,000 (25%) — since the US tax already paid exceeds the Nigerian bill, the credit fully wipes it out, leaving $0 net additional Nigerian tax.
Bringing a large one-off inbound transfer into a Nigerian bank account doesn't by itself create a new tax obligation beyond what's described above. Nigerian banks apply standard anti-money-laundering (AML/KYC) checks under CBN regulations and may ask you to document the legitimate source of a large, unusual transfer — your official prize claim paperwork and the IRS's Form 1042-S withholding statement are exactly what you'd use for that.
Keeping the official win confirmation from the US lottery operator and Form 1042-S makes it easy to answer any bank inquiry about the source of funds, and also documents the foreign tax credit if you claim it on a Nigerian tax return.
See your own after-tax amount as a Nigerian resident
Open the calculator →In practice, no net additional tax — but there's a real Nigerian tax liability that gets credited away, not a straightforward exemption. The US withholds a flat 30% federal tax from a nonresident's lottery winnings (IRC §871(a)) before you ever see the money. There is no comprehensive US-Nigeria income tax treaty (confirmed across PwC Worldwide Tax Summaries, Freeman Law, and other sources — this calculator checked rather than assumed one exists), so that withholding isn't reduced or exempted by treaty. On the Nigerian side, a resident is taxed on worldwide income, and the Nigeria Tax Act (NTA) 2025 (effective 1 January 2026, replacing the old Personal Income Tax Act) raised the top marginal personal income tax rate to 25% on income above ₦50 million — a threshold any jackpot-sized win clears easily. Crucially, NTA 2025 Section 119 grants unilateral double-tax relief even without a treaty, letting a Nigerian resident credit the US tax already paid against their Nigerian liability. Since the US withholding (30%) already exceeds Nigeria's top rate (25%), that credit fully absorbs the Nigerian tax, leaving $0 net additional Nigerian tax on top of the US withholding — though the win should still be reported as income.
Yes, but it doesn't apply here in the way you might expect. Nigeria's Deduction of Tax at Source (Withholding) Regulations 2024 (effective 1 October 2024) set a specific 5% withholding tax on lottery/gaming/reality-show winnings paid to resident individuals (15% for non-residents) — confirmed by multiple Nigerian tax advisory sources. But that withholding obligation falls on the Nigerian-licensed lottery or gaming operator making the payout. A US Powerball or Mega Millions prize is paid directly by a US lottery entity with no Nigerian withholding agent in the chain, so this specific 5% mechanism has no one to apply it. The same logic was confirmed for Nigerian reality-show winners (e.g. Big Brother Naija): winnings paid without a domestic withholding step are simply reported and taxed under ordinary personal income tax rules instead. ⚠️ This calculator hasn't found an explicit Nigerian tax authority ruling confirming this treatment specifically for a foreign lottery win, so it uses the general worldwide-income/top-marginal-rate approach as a reasonable, conservative estimate.
Correct — confirmed rather than assumed, since many other countries this calculator covers do have one. The United States and Nigeria have never concluded a comprehensive income tax treaty. That would normally push this into the same bucket as other treaty-less countries this calculator covers (like the Netherlands or Switzerland, where the US withholding simply stacks with full local tax and no credit). Nigeria is the exception: NTA 2025 Section 119 provides unilateral relief from double taxation as a matter of domestic law, independent of any treaty — so a Nigerian resident still gets a foreign tax credit for the US tax paid, just via domestic statute rather than a bilateral agreement.
NTA 2025 Section 119's unilateral relief is an ordinary (capped) credit: it's limited to the lower of the actual foreign tax paid or the Nigerian tax that would otherwise be due on that same income. On a $1,000,000 win, the US withholds $300,000 (30%) and Nigeria's top-rate liability would be $250,000 (25%) — since the US tax paid ($300,000) exceeds the Nigerian liability ($250,000), the credit is capped at $250,000, fully wiping out the Nigerian bill. The estimated take-home is about $700,000, the same as the US withholding alone.
Bringing a large one-off inbound transfer into a Nigerian bank account doesn't by itself create a new tax obligation beyond what's described above. Nigerian banks apply standard anti-money-laundering (AML/KYC) checks under CBN regulations and may ask you to document the legitimate source of a large, unusual transfer — your official prize claim paperwork and the IRS's Form 1042-S withholding statement are exactly what you'd use for that. This is a routine banking compliance step, not an additional tax.
This page is an informational simulator only and does not broker or facilitate lottery ticket purchases. Actual tax owed depends on individual circumstances and the exchange rate/tax law in effect at filing time — consult a qualified tax professional familiar with both countries, especially given the estimate flagged above.