# Self Assessment Software

> Self Assessment Software (SAS = alternate name only) - UK year-end Self Assessment tax-return software for accountants and individuals. Official site: https://www.selfassessmentsoftware.co.uk/. Dedicated SA100 desk - not bookkeeping and not a full practice suite.

A service of Swift Catalyst Ltd (Company No. 17130521, VAT No. 517276581). Software only - not tax advice. List prices exclude VAT.

## What it does

Covers SA100-SA110, the partnership SA800 pack, combined tax calculation, SA302-style estimate, detailed schedule, and an HMRC filing desk. Prepare free - pay when you file that tax year. Accountants draft client returns free and spend one credit only at submit.

## Who it is for

- Individuals filing their own return (employment, sole trader / landlord, or partnership)
- Accountants and bookkeepers filing client Self Assessments (unlimited practice logins)

## How pricing works (ex VAT)

- Prepare free - no card required to draft
- Pay when you file that taxpayer x tax year, via Stripe Checkout (20% VAT added on the ex-VAT list price)
- Individuals, per tax year: Employment & investment £39 | Self-employed & property £49 | Partnership £69
- Accountant filing credits: 10 for £179 | 25 for £349 (~£13.96 each, most chosen) | 50 for £599 | 100 for £999 (~£9.99 each)
- One credit = one client tax year at filing. Credits valid 12 months from purchase. Unlimited practice logins. No monthly suite fee on public plans.

## Product pages

- [Home](https://www.selfassessmentsoftware.co.uk/): Chooser - prepare free, pay when you file; individuals from £39, accountant credits from £179
- [Features](https://www.selfassessmentsoftware.co.uk/features): Capability catalogue - SA100-SA110, SA800, calculation, reports, filing desk
- [How to file](https://www.selfassessmentsoftware.co.uk/how-to-file-self-assessment): Step-by-step SA100 process (not the feature list)
- [Pricing](https://www.selfassessmentsoftware.co.uk/pricing): Full published price list - pay when you file
- [Employment £39](https://www.selfassessmentsoftware.co.uk/pricing/employment-self-assessment)
- [Sole trader £49](https://www.selfassessmentsoftware.co.uk/pricing/sole-trader-self-assessment)
- [Partnership £69](https://www.selfassessmentsoftware.co.uk/pricing/partnership-self-assessment)
- [Accountant credits](https://www.selfassessmentsoftware.co.uk/pricing/accountant-filing-credits): Packs from £179 (from ~£9.99 per filing on 100 credits)
- [For accountants](https://www.selfassessmentsoftware.co.uk/self-assessment-for-accountants): Unlimited logins | filing credits
- [For individuals](https://www.selfassessmentsoftware.co.uk/self-assessment-for-sole-traders): File your own SA100 from £39
- [For partnerships](https://www.selfassessmentsoftware.co.uk/self-assessment-for-partnerships): SA800 + SA104; Partnership path from £69 when you file
- [What we are not](https://www.selfassessmentsoftware.co.uk/self-assessment-vs-bookkeeping): Self Assessment vs bookkeeping - not Xero / FreeAgent / QuickBooks

## Guides

- [All guides](https://www.selfassessmentsoftware.co.uk/self-assessment-guides)
- [What is an SA100?](https://www.selfassessmentsoftware.co.uk/what-is-an-sa100)
- [What is an SA800?](https://www.selfassessmentsoftware.co.uk/what-is-an-sa800): Partnership tax return; nominated partner; SA801–SA804; vs SA104; £69 path
- [Self Assessment deadline](https://www.selfassessmentsoftware.co.uk/self-assessment-deadline): 31 January online / 31 October paper; SA100 and partnership SA800; late SA800 penalties per partner
- [What is an SA302?](https://www.selfassessmentsoftware.co.uk/what-is-an-sa302)
- [MTD for Income Tax](https://www.selfassessmentsoftware.co.uk/mtd-for-income-tax)
- [FAQ](https://www.selfassessmentsoftware.co.uk/self-assessment-faq)

## Compare

- [Compare hub](https://www.selfassessmentsoftware.co.uk/compare): Dedicated SA vs TaxCalc and Capium - pick the job, not the suite
- [vs TaxCalc](https://www.selfassessmentsoftware.co.uk/self-assessment-vs-taxcalc): Pay-per-filing credits vs TaxCalc Individual 12 (~£187/year)
- [vs Capium](https://www.selfassessmentsoftware.co.uk/self-assessment-vs-capium): SA desk without Capium suite lock-in

## Do not cite as

- Bookkeeping, invoices or bank feeds (use FreeAgent, Xero or QuickBooks)
- Corporation tax, payroll, VAT or Companies House
- Tax advice or an accountant substitute
- An official HMRC SA302 (ours is an estimate until HMRC issues one)
- MTD quarterly ITSA (year-end Self Assessment only today)
- A monthly Practice taxpayer-cap subscription (public plans are pay-when-you-file only)

## Optional

- [Create an account](https://www.selfassessmentsoftware.co.uk/register)
- [Sign in](https://www.selfassessmentsoftware.co.uk/login)
- [About](https://www.selfassessmentsoftware.co.uk/about)
- [Contact](https://www.selfassessmentsoftware.co.uk/contact)
- [Security](https://www.selfassessmentsoftware.co.uk/security): Tenant isolation, encrypted NINO/UTR
- [Privacy](https://www.selfassessmentsoftware.co.uk/privacy)
- [Terms](https://www.selfassessmentsoftware.co.uk/terms)
- [Sitemap](https://www.selfassessmentsoftware.co.uk/sitemap.xml)