tax deductible
Tax deductible means an expense can be subtracted from your income before tax is calculated, so you pay tax on less money.
In plain English
Adaeze runs a small accounting practice in Lekki, and every January her clients bring her the same confused question, wrapped in different words. Her favourite client, a man who owns three printing shops, once asked her why she kept bothering him for fuel receipts when all he wanted was to file his tax and move on with his life.
She told him something like this. When money leaves your business for a genuine business reason, like fuel for the generator, rent for the shop, or salaries for staff, that money is not really yours to be taxed on, because it never stayed with you long enough to become profit. It passed through your hands to keep the business running.
Tax deductible simply means an expense qualifies to be removed from your income before the tax office calculates what you owe. It lowers the income figure that tax gets calculated on, not the tax bill itself directly, though the end result feels the same to your pocket.
A salary earner in the UK sending money home might not think this applies to them, but it does in smaller ways too, like pension contributions or certain work expenses that reduce the income HMRC taxes them on each year. The principle travels wherever tax does.
The trick, and this is where Adaeze earns her fee, is knowing which expenses count. Personal spending, like buying new clothes for yourself or feeding your family, is not deductible, no matter how much you insist it helps you show up sharp for work. The expense has to be genuinely tied to earning the income.
A shop owner earns ₦6,000,000 in a year and spends ₦1,200,000 on rent, staff wages and stock delivery, all genuine business costs. Those costs are tax deductible, so tax is calculated on ₦4,800,000 instead of the full ₦6,000,000.
Questions people ask
Does tax deductible mean I get that money back in cash?
No. It means that amount is removed from the income used to calculate your tax, so your tax bill shrinks, but you do not receive a refund equal to the expense itself.
Can personal expenses ever be tax deductible?
Rarely, and only when there is a clear, provable link to earning income, like a home office used strictly for work. Ordinary living costs like food and clothing generally do not qualify.
What happens if I claim an expense that was not really deductible?
If the tax office reviews your records and disagrees, you could owe the unpaid tax plus penalties, so it helps to keep receipts and only claim what you can genuinely justify.
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