fiscal year
Fiscal Year is the twelve month period a government or business uses to calculate income, expenses and tax, which does not have to match the calendar year.
In plain English
Uche runs a small logistics company in Lagos, and every January his accountant used to ask him a question that made his head spin: 'Boss, which year are we closing?' Uche always assumed a year was a year, January to December, simple. Then his accountant explained that his company's books actually run from July to June, because that is when the business cycle makes sense, after the busy December period has settled and before the next one begins.
That period, the twelve months a company or government chooses for counting its money, is called a fiscal year. It does not have to follow January to December. Nigeria's government, for instance, runs its fiscal year alongside the calendar year, January to December, and that is when the federal budget is planned, spent and reported on.
But many companies do not. A business might choose April to March, or October to September, depending on when its sales are highest or lowest, or simply what suits its industry. A UK company, for example, often uses a fiscal year ending on 31 March or 5 April, which lines up with the UK tax year for individuals.
For someone like Adaeze in London sending money home to her mother in Enugu, the fiscal year rarely touches her daily life directly. But if she runs her own small business as a sole trader, HMRC will ask her to report income based on the UK tax year, 6 April to 5 April, and that becomes her personal fiscal year for tax purposes.
The point of a fiscal year is simple, even if the dates look confusing. It gives a business or government a fixed stretch of time to measure how much came in, how much went out, and what is owed in tax, so that comparisons from one period to the next actually mean something.
A Nigerian tech startup chooses a fiscal year running from April to March instead of January to December. By March 2025, its books show revenue of ₦120,000,000 for that fiscal year, and that figure is what it reports to tax authorities and investors, not the calendar year total.
Questions people ask
Why do some companies not use January to December as their fiscal year?
Because it is more useful to end the year when business naturally slows down, so stock counts, sales figures and expenses are easier to measure without cutting across a busy season.
Does Nigeria's fiscal year match the calendar year?
Yes, the Nigerian government's fiscal year runs from January to December, and that is the period used for the national budget and government financial reporting.
How does a fiscal year affect an ordinary employee's personal taxes?
For most employees in Nigeria and the UK, personal tax follows the tax year set by the government, not a company's chosen fiscal year, so your salary tax is unaffected by your employer's internal accounting dates.
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