TaxCalc vs Untied:Which is more popular?
In September 2026, TaxCalc had more branded searches than Untied among self assessment tax return software in the United Kingdom. TaxCalc had about 4,400 branded searches, while Untied had 110. TaxCalc made up 37.1% of all self assessment tax return software searches we track, and Untied accounted for 0.93%. When we asked ChatGPT and Google AI Overviews about self assessment tax return software, TaxCalc appeared in one of the five answers and Untied in none.
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Top self assessment tax return software in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, TaxCalc was mentioned in one out of five: not in any of the three ChatGPT answers, but in one of the two Google AI Overviews. Untied did not appear in any of the five answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
FreeAgent1st
GoSimpleTax2nd
Sage Accounting3rd
Xero4th
TaxCalc5th
Andica6th
Coconut7th
Taxfix–
Pie–
Untied–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- FreeAgent3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- GoSimpleTax2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Sage Accounting2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Xero2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- TaxCalc1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Andica1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Coconut1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Taxfix0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Pie0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Untied0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about self assessment tax return software
5 answers
Asked ChatGPT
“What's the best software for filing a self assessment tax return?”
Asked ChatGPT
“Which apps can sole traders use for Making Tax Digital?”
Asked ChatGPT
“What's the easiest way to do my self assessment tax return?”
Searched Google, AI Overview
“making tax digital software”
Searched Google, AI Overview
“self assessment software”
Brands are shown in the order each answer named them. The survey took place in United Kingdom on October 28, 2026.
Is TaxCalc or Untied more popular in search?
This chart shows how often people search Google for TaxCalc and Untied by name. Each line represents a brand's share of searches for all ten self assessment tax return software we track, month by month, from searches in United Kingdom.
Share of searches by month for TaxCalc, Untied. The figures are in the table below the chart.
View monthly share of searches table
| Month | Taxfix | TaxCalc | GoSimpleTax | Andica | Pie | Sage Accounting | Coconut | Untied | FreeAgent | Xero |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 48.6% | 33.7% | 8.1% | 3.7% | 3% | 0.25% | 1.3% | 0.69% | 0.37% | 0.31% |
| Nov 2025 | 50.3% | 30.2% | 8.9% | 3.3% | 4% | 0.28% | 1.5% | 0.67% | 0.39% | 0.39% |
| Dec 2025 | 57.7% | 23.5% | 8.6% | 3.8% | 3.8% | 0.21% | 1.1% | 0.48% | 0.43% | 0.27% |
| Jan 2026 | 56.5% | 18.9% | 12.6% | 5.6% | 3% | 0.4% | 0.91% | 0.77% | 0.82% | 0.4% |
| Feb 2026 | 41.1% | 34.2% | 7.8% | 4.6% | 7.8% | 0.39% | 2% | 1.2% | 0.47% | 0.54% |
| Mar 2026 | 35.2% | 40.1% | 7.9% | 4.4% | 7.9% | 0.43% | 1.9% | 1.1% | 0.43% | 0.67% |
| Apr 2026 | 35.9% | 40.3% | 9.5% | 5% | 5% | 0.35% | 1.9% | 1.1% | 0.55% | 0.45% |
| May 2026 | 38.6% | 39.3% | 7.3% | 6.4% | 4.3% | 0.22% | 2.3% | 0.8% | 0.44% | 0.36% |
| Jun 2026 | 42.2% | 38% | 6.2% | 6.2% | 3.4% | 0.28% | 2.3% | 0.77% | 0.42% | 0.35% |
| Jul 2026 | 39.4% | 38.7% | 7.2% | 6.3% | 3.4% | 0.5% | 2.8% | 1% | 0.36% | 0.29% |
| Aug 2026 | 35.6% | 42.7% | 7% | 7% | 3.8% | 0.71% | 2.1% | 0.71% | 0.24% | 0.24% |
| Sep 2026 | 40.5% | 37.1% | 7.4% | 6.1% | 3.3% | 2.2% | 1.8% | 0.93% | 0.42% | 0.25% |
How has the TaxCalc and Untied comparison changed over the last 12 months?
3 findings
- TaxCalc was ahead of Untied in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, TaxCalc’s share of searches among self assessment tax return software in the United Kingdom moved from 33.7% to 37.1%, and its estimated monthly branded searches moved from 5.4K to 4.4K.
- Across the 12 months ending September 2026, Untied’s share of searches among self assessment tax return software in the United Kingdom moved from 0.69% to 0.93%, and its estimated monthly branded searches held steady at 110.
How did search popularity change for United Kingdom self assessment tax return software in September 2026?
2 changes
In September 2026, Taxfix overtook TaxCalc to become the leader among self assessment tax return software in the United Kingdom, with 40.5% of the searches.
In September 2026, TaxCalc lost share of searches among self assessment tax return software in the United Kingdom, from 42.7% to 37.1%.
How are branded searches counted?
3 search terms
Brandwave collects information about searches that people make online using TaxCalc’s and Untied’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Other head-to-heads among self assessment tax return software
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