What it means
Taxes fall into broad families. Income and profit taxes are charged on what a person or company earns, transaction taxes such as sales tax or value added tax are charged when something is bought, and property, payroll and excise taxes are charged on specific assets, wages or goods.
An important distinction is between a tax the business bears and a tax it merely collects. Corporate income tax is a real cost to the company, whereas sales tax collected from customers and payroll tax withheld from staff is money passing through the business on its way to the government.
Tax matters commercially because it is often one of the largest single outgoings a profitable business faces, and because its timing rarely matches the accounting profit that triggered it. A company can report a strong profit and still struggle to fund the tax payment if cash has been consumed by stock and receivables.
Businesses distinguish between tax planning, which means arranging affairs sensibly within the rules by claiming reliefs and timing expenditure well, and evasion, which is illegal misreporting. Between them sits aggressive avoidance, which may be legal but carries reputational and enquiry risk that most companies now weigh carefully.
A practical nuance is the difference between the headline tax rate and the effective rate a company actually pays. Non-deductible costs raise the effective rate, while accelerated capital allowances, research incentives and losses carried forward lower it.
In practice
Real-world examples.
Example
A cafe group with $2,800,000 of sales collects sales tax from customers each month and pays it over quarterly. The owner learns to exclude that money from the cash flow forecast as available funds, because it was never the business's money to spend.
Example
A design agency makes a $600,000 profit but has $520,000 tied up in unpaid invoices at the year end. The accountant sets up a separate savings account into which 21% of each month's profit is transferred, so the tax bill does not arrive as a cash shock.
Example
A manufacturer invests $900,000 in new equipment shortly before its year end and claims accelerated capital allowances, reducing its taxable profit for the year and deferring roughly $189,000 of tax into later periods.
Formula
Calculation
Tax payable = Taxable profit x Tax rate, where taxable profit is accounting profit adjusted for items the tax rules treat differently
Denholm Fabrics reports accounting profit before tax of $1,300,000. Its tax return adds back $50,000 of client entertaining that is not deductible, and deducts an extra $150,000 of capital allowances available on new machinery beyond the depreciation charged in the accounts.
Taxable profit is therefore $1,300,000 + $50,000 - $150,000 = $1,200,000. At a corporate tax rate of 21%, the tax payable is $1,200,000 x 21% = $252,000.
The effective tax rate measured against accounting profit is $252,000 / $1,300,000 = 19.4%, lower than the 21% headline rate because the capital allowances outweighed the disallowed entertaining. That difference is timing rather than a permanent saving on the machinery, since faster relief now means less relief in later years.Case study
Seen in the real world.
The following is an illustrative, fictional example. Pennhurst Joinery grew from $1,400,000 to $4,900,000 of revenue in three years and made a profit before tax of $610,000 in its best year. The owner, who had always drawn cash freely from the business, was surprised by a corporate tax assessment of about $128,000 alongside a payment on account for the following year.
The company had enough profit but not enough cash, because growth had absorbed money into work in progress and unpaid customer accounts. Pennhurst agreed a payment plan with the tax authority, paid a modest amount of interest, and put two habits in place: a monthly transfer of 21% of management-accounts profit into a separate tax account, and a rolling twelve-month forecast that showed tax payment dates as fixed commitments.
In this fictional case nothing about the tax rules changed and no clever structure was used. The business simply moved from treating tax as an annual surprise to treating it as a scheduled cost, which removed the pressure entirely.
Watch out
Common mistakes.
- Treating sales tax collected from customers as business income, then spending it and finding the cash is not there when the return falls due.
- Assuming accounting profit and taxable profit are the same figure, when disallowed costs and different depreciation rules routinely make them differ.
- Leaving tax planning until after the year end, when most useful decisions about timing of expenditure and reliefs had to be made before it.
Questions
People also ask.
What is the difference between tax avoidance and tax evasion?
Avoidance means arranging affairs within the law to reduce tax, while evasion is deliberately misreporting or concealing income and is a criminal offence.
Why is my effective tax rate different from the headline rate?
Non-deductible expenses push it up, and reliefs such as capital allowances, loss relief and research incentives pull it down.
Should a business set aside tax money separately?
Yes, transferring an estimated percentage of profit into a separate account each month is the simplest way to avoid a cash squeeze when the bill arrives.
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