What you pay depends on two things: whether you are a company filing for itself or an accountant firm filing for clients, and which part of Tax Optimiser you use. Year-end filing (accounts and Corporation Tax) is charged per filing. VAT and Making Tax Digital for Income Tax are a subscription. The two are billed separately.
At a glance
| Year-end accounts and CT600 | VAT and MTD for Income Tax | |
|---|---|---|
| A company filing for itself | £10 + VAT for each accounting period (£5 + VAT if dormant), paid when you are ready to submit | Free for the first year, then £30 + VAT a year |
| An accountant firm | One credit for each client period, bought in packs from £10 down to £3 a credit (+ VAT); dormant credits £2 + VAT | A monthly subscription from £5 + VAT, set by how many clients the firm has |
Prices are those in force in October 2026. The pricing page always has the current figures.
Year-end filing: one charge per period
For accounts and Corporation Tax you pay once for an accounting period, and that payment covers:
- the CT600 to HMRC and the accounts to Companies House;
- every attempt, if a submission is rejected and has to be sent again;
- amended returns and amended accounts for that period.
Preparing is free. You can enter the trial balance, build the accounts and the computation and review every document without paying; the charge arises when you open the submission.
- A company pays by card for the period: Paying to submit a period.
- A firm uses a credit from its balance: Credits for accountant firms. Its clients are never asked to pay.
VAT and MTD for Income Tax: a subscription
VAT returns and quarterly MTD for Income Tax updates are covered by a subscription paid by card through Stripe.
- A company or individual pays nothing for the first year, then £30 + VAT a year each. For VAT the year runs from the first return filed.
- A firm has a 30-day trial, then pays monthly according to the number of clients it has.
| Clients (organisations and individuals) | Per month, + VAT |
|---|---|
| 1 to 10 | £5 |
| 11 to 25 | £10 |
| 26 to 50 | £15 |
| 51 to 75 | £20 |
| 76 to 100 | £30 |
| 101 to 125 | £35 |
| 126 or more | £40 |
See Subscription, card and invoices.
Where to find billing
- Company: Settings, then Billing.
- Firm: Firm Settings, then Billing for the subscription and invoices, or Credits for the credit balance.
All card payments are taken by Stripe. Tax Optimiser never sees or stores your card number.