Aiden Startup — Company formation

What the tax provision is and how to turn it on

Updated 11/11/2026

The Tax provision is there to help you set aside Corporation Tax as you get paid, so it doesn’t catch you out at year end. As the app says, Aiden does not move your money: the maths is Aiden’s, the transfer is yours.

How to turn it on

Open Taxes and scroll down to Taxes to pay
Turn on the Tax provision switch. Lunnar confirms it with Provision on

The switch is saved on this phone: if you use the app on another phone, turn it on there too.

Where the figure comes from

On that card, Estimated Corporation Tax shows what you should set aside and, below it, Income, Expenses and Profit. It’s the same figure as To set aside at the top of the screen. It’s worked out from:

invoices paid this year in Books and anything you’ve been paid through Stripe without an invoice
this year’s expenses recorded in Books
the approximate percentage shown next to the figure, based on profit

⚠️ Important: it’s an estimate based on the current year and what’s in Books, not the amount HMRC will ask for: the real Corporation Tax comes from your financial year’s accounts. If there’s no profit yet, you’ll see Nothing yet.

💡 Tip: record all your business expenses in Books. As the app says, every business expense lowers your tax.

When it’s time to pay: how to pay Corporation Tax. What this tax is: Corporation Tax in the United Kingdom.

Something doesn’t look right? Write to us from Settings → Support → Contact support or at support@aiden.es.

⚖️ This guide is informational and does not replace professional tax or legal advice. For your specific situation, consult an adviser.

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