Self Assessment Software Prices Compared (October 2026)
Self Assessment Software Prices Compared (October 2026)
Short answer: on 15 October 2026, HMRC-recognised software for one individual Self Assessment return cost from £14.50 to £113.99, and up to £129.99 with the SA109 for non-residents. HMRC's own online service is free if you can use it. The cheapest choice depends on how many returns you file and whether you need the SA109.
How these prices were checked: each price below is as shown on the provider's own website on 15 October 2026. Prices change, so check the provider's site before you buy. DTax Filer publishes this comparison; if you spot something out of date, tell us and we'll correct it.
Self Assessment software prices for 2025–26
| Provider | One individual return | With a tax adviser | SA109 (non-residents) |
|---|---|---|---|
| HMRC online service | Free | – | Not available if you're non-resident |
| DTax Filer | £14.50 (Standard), £19.50 with a PDF copy (Standard Plus). Free to prepare | £60 (Assisted) | Included in every plan |
| 123 e-Filing | £18.00 (Standard Package), including VAT | £75.00 (Assisted Package), including VAT | Its site says non-resident pages are included |
| TaxCalc | £42.00 for up to six returns (TaxCalc 2026 Individual 6). VAT worked out at checkout | Not shown on the page we read | Its site says all non-resident pages are included |
| GoSimpleTax | £69.99 to £113.99 a tax year (Individual), including VAT | Not shown on the page we read | Separate Residency plan: £85.99 to £129.99 |
DTax Filer's current prices are always on our pricing page. For the wider picture, including HMRC's free service and accountants, see what it costs to file a Self Assessment return.
What to compare besides the price
- How many returns you need. Some products cover one return, others several. TaxCalc's £42.00 covers up to six returns, which works out cheaper per return if you file for a whole family.
- Per return or per year. DTax Filer prices each return. GoSimpleTax prices by tax year.
- Whether you need the SA109. If you're non-resident you can't use HMRC's free service, and some providers charge more for residence pages. DTax Filer includes the SA109 in every plan. See filing the SA109 online.
- Help from a tax adviser. DTax Filer (£60) and 123 e-Filing (£75.00) both publish an option where a tax adviser reviews your return.
- Trying it first. With DTax Filer you can prepare your return and see the tax calculated before you pay.
- Amendments. Check whether correcting a return after you've sent it costs extra. With DTax Filer it's included.
Is HMRC's free service enough?
If HMRC's online service covers your return, you don't need to pay for software. GOV.UK says you can't use it for a partnership, a trust or an estate, if you lived abroad as a non-resident, to report multiple chargeable event gains, or if you get income from a trust, you're a Lloyd's underwriter or a religious minister. In those cases you need software, a paper return or a tax professional.
Which is cheapest for you?
| Your situation | Cheapest option on 15 October 2026 |
|---|---|
| One return, and HMRC's service covers it | HMRC's online service: free |
| One return, using software | DTax Filer Standard: £14.50 |
| Non-resident, one return with the SA109 | DTax Filer Standard: £14.50 |
| Several returns for one household | TaxCalc: £42.00 for up to six |
| One return checked by a tax adviser | DTax Filer Assisted: £60 |
Frequently asked questions
What is the cheapest Self Assessment software?
Of the providers compared here on 15 October 2026, DTax Filer's Standard plan at £14.50 was the lowest price for a single return. HMRC's own online service is free if you are able to use it. If you file several returns for one household, TaxCalc's £42.00 for up to six can work out cheaper per return.
How much does TaxCalc cost?
TaxCalc's website showed £42.00 for TaxCalc 2026 Individual 6 on 15 October 2026, which prepares up to six individual returns for 2025–26. It said VAT is worked out at checkout.
How much does GoSimpleTax cost?
GoSimpleTax's pricing page showed its Individual plan at £69.99 to £113.99 a tax year, and its Residency plan, which adds the SA109, at £85.99 to £129.99, including VAT, on 15 October 2026.
How much does 123 e-Filing cost?
123 e-Filing's website showed £18.00 for its Standard Package and £75.00 for its Assisted Package with a tax adviser, both including VAT, on 15 October 2026.
Can I change software from one year to the next?
Yes. Each year's return is filed separately, so you can use any HMRC-recognised software for a new tax year.