CommBank, NAB, Westpac or ANZ – how do the Big Four savings accounts stack up?

Household budgets remain tight with cost of living pressures still at the fore. The RBA kept the cash rate on hold at 3.60% in November and economists now predict that further cuts won't come into play until mid 2026. This means being aware of the best savings rates is important. 

While the Big Four dominate the market, they typically don't offer the highest rates available.

How do the big four savings accounts compare?

The Big Four banks all offer savings account interest rates above the current cash rate of 3.60%.

However, these rates aren't as high as some other major banks and smaller providers. For instance, Rabobank’s High Interest Savings Account at 5.00% p.a. (for the first 4 months, reverting to 3.45% p.a.) easily outpaces the leading Big Four rate.

Best savings rates offered by the Big Four – November 2025

• CBA NetBank Saver – 4.45% p.a. (introductory rate, reverts to standard 1.55% p.a. rate after 5 months)
• NAB iSaver – 4.45% p.a. (introductory rate, reverts to standard 1.25% rate after 4 months)
• ANZ Plus Growth Saver – 4.15% p.a. (bonus rate, ongoing if monthly conditions are met)
• Westpac Life  – 4.25% p.a. (bonus rate, ongoing if monthly conditions are met)

It's worth noting that high interest savings rates often require customers to meet specific conditions in order to receive the full advertised rate. Common requirements include:

• Monthly deposit minimums
• Limited or no withdrawals
• Maintaining minimum balances
• Age restrictions for youth or senior accounts
• New customer bonuses that expire after an introductory period.

What conditions do the Big Four impose?

Keep in mind that most of these high interest savings products are bonus saver accounts, with strings attached. To receive the bonus rate, you'll usually need to meet some eligibility criteria – such as maintaining a minimum balance and avoiding withdrawals. If you fail any of the requirements each month, you may receive a lower standard rate and earn far less interest.

Below you'll find a comprehensive breakdown of the requirements and conditions you must meet to qualify for the top rates offered by Westpac, CommBank, NAB and ANZ.

How do the Big Four compare to smaller providers?

Many people stick with one bank for everything, but this could mean missing out leading rates. 

Shopping around for savings accounts can really boost your stash and it’s good practice to compare different providers against your current account. Plus, most savings accounts nowadays can be opened and operated online. This means you can shuffle money between accounts and set up new ones without ever having to visit a branch.

Below is a breakdown of the leading savings accounts on Mozo's database – conditions apply.

Best savings rates in Mozo's database – November 2025

• ubank Save – 5.10% p.a. (bonus rate, ongoing if monthly conditions are met)
• Rabobank HISA – 5.00% p.a. (introductory rate, reverts to standard 3.45% p.a. rate after 4 months)
• ING Savings Maximiser – 4.80% p.a. (bonus rate, ongoing if monthly conditions are met)
• Bankwest Easy Saver – 4.80% p.a. (introductory rate, reverts to standard 4.00% p.a. rate after 4 months)
• MOVE Bank Growth Saver – 4.75% p.a. (bonus rate, ongoing if monthly conditions are met)

Want to know how the Big Four compare to other savings accounts? Check out the table below for more options, or head over to our savings account comparison page for more information.