BDO vs Deloitte:Which is more popular?
In September 2026, Deloitte had more branded searches than BDO among tax advisory brands in New Zealand. Deloitte had about 680 branded searches, while BDO had 200. Deloitte made up 13.2% of all tax advisory brand searches we track, and BDO accounted for 3.9%. When we asked ChatGPT and Google AI Overviews about tax advisory brands, Deloitte appeared in three of the five answers and BDO in one. Deloitte was mentioned before BDO in every answer.
Who do people search for more?
Deloitte, about 3 searches for every 1 for BDO
Who does AI mention more?
Deloitte, mentioned in 3 of 5 answers, BDO in 1
Who does AI recommend more?
Deloitte, named ahead of BDO in every answer
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Top tax advisory brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Deloitte was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. BDO was mentioned in one out of five: in one of the three ChatGPT answers, but not in either of the two Google AI Overviews. Deloitte was listed before BDO in every answer.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
KPMG4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
PwC3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Deloitte3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
EY2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
BDO1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about tax advisory brands
5 answers
Asked ChatGPT
“Which tax advisory brand should I hire in New Zealand?”
- 1KPMG
- 1
Asked ChatGPT
“What are the best tax advisory brands in New Zealand?”
Asked ChatGPT
“What's the best tax advisory brand in New Zealand for tax advice?”
Searched Google, AI Overview
“best tax advisor”
Searched Google, AI Overview
“business tax advice”
Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.
Is BDO or Deloitte more popular in search?
This chart shows how often people search Google for BDO and Deloitte by name. Each line represents a brand's share of searches for all five tax advisory brands we track, month by month, from searches in New Zealand.
Share of searches by month for Deloitte, BDO. The figures are in the table below the chart.
View monthly share of searches table
| Month | PwC | EY | Deloitte | BDO | KPMG |
|---|---|---|---|---|---|
| Oct 2025 | 38% | 35.7% | 17.7% | 6.3% | 2.3% |
| Nov 2025 | 35.8% | 37.4% | 16.9% | 7.3% | 2.6% |
| Dec 2025 | 36.3% | 36.3% | 18.9% | 6.3% | 2.2% |
| Jan 2026 | 36.1% | 38.6% | 17.2% | 6% | 2.1% |
| Feb 2026 | 37.7% | 39.8% | 15.3% | 4.7% | 2.6% |
| Mar 2026 | 30.7% | 46.8% | 14.1% | 5.4% | 3% |
| Apr 2026 | 33.9% | 43.2% | 15.2% | 5.3% | 2.4% |
| May 2026 | 32.4% | 43.8% | 15.8% | 5.7% | 2.3% |
| Jun 2026 | 31.9% | 43.4% | 16.1% | 5.1% | 3.6% |
| Jul 2026 | 32.9% | 42.7% | 15.8% | 5.7% | 2.8% |
| Aug 2026 | 43.2% | 32.3% | 16% | 5.7% | 2.8% |
| Sep 2026 | 50% | 30.8% | 13.2% | 3.9% | 2.1% |
How has the BDO and Deloitte comparison changed over the last 12 months?
3 findings
- Deloitte was ahead of BDO in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, BDO’s share of searches among tax advisory brands in New Zealand moved from 6.3% to 3.9%, and its estimated monthly branded searches moved from 250 to 200.
- Across the 12 months ending September 2026, Deloitte’s share of searches among tax advisory brands in New Zealand moved from 17.7% to 13.2%, and its estimated monthly branded searches moved from 700 to 680.
How did search popularity change for New Zealand tax advisory brands in September 2026?
2 changes
In September 2026, Deloitte lost share of searches among tax advisory brands in New Zealand, from 16% to 13.2%.
In September 2026, BDO lost share of searches among tax advisory brands in New Zealand, from 5.7% to 3.9%.
How are branded searches counted?
6 search terms
Brandwave collects information about searches that people make online using BDO’s and Deloitte’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 tax advisory brands
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