SA is often sold with a practice suite (bookkeeping, CT, payroll). Useful if you want one vendor for everything.
Comparison
Self Assessment Software vs Capium
Capium is an all-in-one practice suite. Self Assessment Software is dedicated SA100 production. If you only need the individual tax return, you should not have to buy bookkeeping, CT600 and payroll to get there.
In short
Capium’s Self Assessment module usually sits inside a full practice suite. Self Assessment Software is SA-only: prepare free, pay when you file — individuals from £39, accountant credits from £179 for 10. No suite lock-in.
Suite vs dedicated SA desk
Filing credits for practices (10–100) and individual returns from £39–£69 per tax year. Unlimited practice logins. Prepare free — pay when you file.
We cover SA100–SA110 and the partnership SA800 pack. Not trust SA900, and not CT600.
Year-end Self Assessment is included now. MTD quarterly Income Tax updates are a later add-on — buy Capium (or another MTD tool) if you need quarterly today.
When to choose which
You want one suite for bookkeeping, corporation tax, payroll and SA under one vendor and contract.
You only need a dedicated Self Assessment desk: prepare free, pay per filing, unlimited practice logins, no suite fee.
Our prices
Pay when you file — no suite fee
Individuals from £39 per tax year. Accountants buy filing credits. Full cards on Pricing.
Employment & investment
£39
Per tax year · ex VAT
Self-employed & property£49
Per tax year · ex VAT
Partnership£69
Per tax year · ex VAT
FAQs
vs Capium — questions answered
Is Self Assessment Software cheaper than Capium for SA only?
For dedicated Self Assessment without a suite, yes on typical bands. Capium’s SA module usually needs a full practice suite. We sell individuals from £39 and accountant credits from £179 for 10 (ex VAT).
Do you replace Capium’s whole suite?
No. We do not include bookkeeping, CT600 or payroll. Keep Capium (or another suite) for those jobs and use us for year-end SA if that is the gap.
Can accountants use unlimited logins?
Yes. Practice credit packs include unlimited staff logins. Credits are consumed at filing — one credit per client tax year — not per login.
Does Capium include MTD quarterly and you do not?
Capium often bundles MTD inside the suite. Our current public price is year-end Self Assessment. Quarterly MTD updates are a later add-on.
Prepare free
Try dedicated Self Assessment
Start free with no card. Pay only when you file that tax year.