Prior Year Tax on Profit in Comparative Accounts

When filling in your TinyTax accounts, the P&L has two columns: the current year and a prior year (comparative) column. The Tax on profit row in the prior year column is where you enter the corporation tax charge for the previous accounting period.

What to Enter

Enter the corporation tax charge (the amount calculated as due) for the prior accounting year — not what you physically paid, but what you were liable for during that period.

If your prior year had taxable profit, there will be a positive figure here. If the company made a loss or was dormant with no taxable income, enter 0.

Where to Find the Figure

• If you filed a CT600 for the prior year (through TinyTax or directly with HMRC): the tax liability is shown on the CT600 itself. In TinyTax, go to the prior year filing session and check the tax computation.
• If your accountant filed it: ask them for the corporation tax charge for that accounting year.
• From HMRC online: log in to your HMRC Business Tax Account at gov.uk and look at your Corporation Tax history for the prior period — the liability amount will be listed.

Why It Matters

Companies House accounts require comparative (prior year) figures so readers can see how the company has performed year-on-year. The "Tax on profit" line makes the profit after tax figure meaningful — without it, profit after tax equals profit before tax, which is only correct if there was genuinely zero corporation tax liability.

Can I Leave It Blank?

You can leave it blank if the corporation tax charge for the prior year was genuinely zero (for example, because the company made a loss or was dormant). If there was a tax liability, enter the figure — leaving it blank will show an incorrect profit after tax.