PORTAX
6.0#16 in tax planning softwareFrom $74.92 a monthWindows
VisitPORTAX vs TaxCalc
What both publish
| Fact | PORTAX | TaxCalc |
|---|---|---|
| Company history | PortaxSoftware, LLC describes itself as privately held and based on the west coast of the United States, and says PORTAX has been commercially available since the late 1990s. | TaxCalc says the product began in 1983 when Which? released its first version for the BBC Model B. |
| Support | Subscriptions include free maintenance and technical support; technical support aims to respond within 24 hours and is offered in English by email, video conference and, for US subscribers, phone. | The company says every licence includes unlimited UK-based support from accountancy-trained specialists by phone and email, Monday to Friday. |
PORTAX plans
- PORTAX Version 9.9$89 a month
- PORTAX Plus Version 9.9$299 a month
- PORTAX Version 9.9$899 a year
- PORTAX Plus Version 9.9$2,999 a year
TaxCalc plans
- TaxCalc 2026 Individual 6£42 a year
- Engager Practice Management — up to 5 clients£9 a month
- Self Assessment tax software£42, paid once
- Accounts Production 12£164 a year
- Individual 12£187 a year
Pick PORTAX if…
PORTAX suits users needing tax-aware portfolio modelling, scenario analysis, optimization, and client reporting on Windows. It is relevant to portfolios with complex trading and international tax structures.
Pick TaxCalc if…
TaxCalc may suit UK accountancy practices, in-house finance teams, sole traders and individuals preparing returns or statutory accounts. Its product range includes support for self-employment and investment income.