CommBank vs NAB:Which is more popular?
In September 2026, CommBank had more branded searches than NAB among banks in Australia. CommBank had about 1.6 million branded searches, while NAB had 1 million. CommBank made up 28.4% of all bank searches we track, and NAB accounted for 18.1%. When we asked ChatGPT and Google AI Overviews about banks, CommBank appeared in four of the five answers and NAB in three. CommBank was mentioned before NAB in every answer that named either.
Who do people search for more?
CommBank, about 57% more searches than NAB
Who does AI mention more?
CommBank, mentioned in 4 of 5 answers, NAB in 3
Who does AI recommend more?
CommBank, named ahead of NAB in 3 of 3 answers
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Top banks in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, CommBank was mentioned in four out of five: in two of the three ChatGPT answers and in both Google AI Overviews. NAB was mentioned in three out of five: in one of the three ChatGPT answers and in both Google AI Overviews. CommBank was listed before NAB in every answer that named either.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
ING1st
Macquarie Bank2nd- CommBank3rd
Up4th
NAB5th
Westpac6th
ANZ7th
ubank8th
Bendigo Bank9th
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- CommBank4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Macquarie Bank4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- ING4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Westpac3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- NAB3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Up3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- ANZ2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Bendigo Bank2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- ubank2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
See every answer about banks
5 answers
Asked ChatGPT
“Which bank should I use in Australia?”
Asked ChatGPT
“What are the best banks in Australia?”
Asked ChatGPT
“What's the best bank in Australia for a high interest savings account?”
Searched Google, AI Overview
“bank account”
Searched Google, AI Overview
“best bank australia”
Brands are shown in the order each answer named them. The survey took place in Australia on October 22, 2026.
Share of searches by month for CommBank, NAB. The figures are in the table below the chart.
View monthly share of searches table
| Month | CommBank | ANZ | Westpac | NAB | Bendigo Bank | Macquarie Bank | ubank | ING | Up |
|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 30.5% | 20.6% | 20.6% | 17.6% | 5.1% | 3.4% | 1% | 0.86% | 0.45% |
| Nov 2025 | 28.4% | 21.3% | 21.3% | 18.2% | 5.2% | 3.5% | 0.86% | 0.79% | 0.47% |
| Dec 2025 | 29.6% | 22.2% | 22.2% | 15.6% | 5.5% | 3% | 0.9% | 0.64% | 0.4% |
| Jan 2026 | 29.8% | 22.4% | 22.4% | 15.6% | 4.5% | 3% | 1.1% | 0.75% | 0.49% |
| Feb 2026 | 31.1% | 19% | 23.3% | 16.3% | 4.7% | 3.1% | 1.2% | 0.78% | 0.51% |
| Mar 2026 | 28.5% | 21.4% | 21.4% | 18.3% | 5.3% | 2.9% | 1.1% | 0.72% | 0.47% |
| Apr 2026 | 25.7% | 23.5% | 23.5% | 16.4% | 5.8% | 3.1% | 0.95% | 0.64% | 0.42% |
| May 2026 | 25.5% | 23.2% | 23.2% | 16.2% | 5.7% | 3.8% | 1.1% | 0.78% | 0.51% |
| Jun 2026 | 26% | 23.7% | 23.7% | 16.6% | 4.7% | 3.2% | 1.2% | 0.65% | 0.43% |
| Jul 2026 | 26% | 23.7% | 23.7% | 16.6% | 4.8% | 3.2% | 0.96% | 0.68% | 0.43% |
| Aug 2026 | 27.9% | 18.7% | 22.9% | 19.4% | 5.6% | 3.1% | 1.1% | 0.77% | 0.51% |
| Sep 2026 | 28.4% | 21% | 21% | 18.1% | 5.2% | 3.5% | 1.3% | 1% | 0.57% |
How has the CommBank and NAB comparison changed over the last 12 months?
3 findings
- CommBank was ahead of NAB in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, CommBank’s share of searches among banks in Australia moved from 30.5% to 28.4%, and its estimated monthly branded searches moved from 2.2M to 1.6M.
- Across the 12 months ending September 2026, NAB’s share of searches among banks in Australia moved from 17.6% to 18.1%, and its estimated monthly branded searches moved from 1.3M to 1M.
How did search popularity change for Australia banks in September 2026?
3 changes
In September 2026, ANZ overtook Westpac and NAB to rank 2nd among banks in Australia, with 21% of the searches.
In September 2026, NAB lost share of searches among banks in Australia, from 19.4% to 18.1%.
CommBank’s share of searches among banks in Australia has gained ground for 3 months in a row, from 26% to 28.4% in September 2026.
How are branded searches counted?
4 search terms
Brandwave collects information about searches that people make online using CommBank’s and NAB’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 banks
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