How a high-interest savings account works

For many of us, savings accounts are places where our money sits quietly, out of sight and out of mind. But what if your savings could do more than just sit there? With a high-interest savings account, you’ll get a better return over time. It’s a simple, low-risk, and often overlooked option that makes your money work a little harder for you.

At Coastline, we have two distinct high-interest savings accounts, the Coastline Savings Account and Bonus Reward Saver. Each designed for different savings styles. If you’re thinking about a high-interest savings account, our guide explains how these accounts work and the ways they can power up your savings - so you can choose the one that’s right for you.

What is a high-interest savings account?

A high-interest savings account is designed to grow your savings faster by offering a higher interest rate than a typical savings account. The higher the interest rate, the quicker your savings can accumulate, especially when compounded over time. Different accounts have different conditions and ways to earn interest, so it’s important to compare before you sign up.

A deep dive into Coastline's high-interest savings accounts

Coastline Savings Account

The Coastline Savings Account is a straightforward savings solution for members who want easy access to their money alongside a competitive variable interest rate.

Why open a Coastline Savings Account?

This account is ideal if you want to save at your own pace without meeting monthly deposit requirements or locking your funds away. You can withdraw money at call whenever needed, with no impact on the interest rate you earn.

It’s well suited to everyday savings, emergency funds, or setting money aside while keeping it accessible.

Key features

• Variable, flat interest rate
• No monthly deposit requirement
• Unlimited withdrawals
• Interest calculated daily and paid monthly
• Online and branch access
• No card access
• One account per Coastline membership

Additional details to be aware of:

• Maximum balance of $2 million (no interest paid on amounts over $2 million)

Will this account suit you?

The Coastline Savings Account is designed for members who:

• Want a savings account with a variable interest rate
• Prefer flexibility over bonus conditions
• Need the option to access their money at any time
• Want a simple, no‑pressure way to grow their savings

Whether you’re building an emergency buffer, setting aside funds for short‑ to medium‑term goals, or simply want a secure place to hold your savings, this account offers reliability and ease.

To sum it up

The Coastline Savings Account keeps saving simple. With no monthly deposit requirements, unlimited withdrawals, and a flat variable interest rate, it gives you the freedom to manage your money your way, while still earning interest.

Bonus Reward Saver

Designed for savers who are happy to commit to regular deposits in exchange for the chance to earn higher returns.

Why open a Bonus Reward Saver?

The Bonus Reward Saver is ideal for people who want to maximise their savings by building consistent habits. If you can make regular deposits and limit withdrawals, this account rewards you with bonus interest, while still giving you access to your money if you need it (even if that means earning a lower rate for the month).

It’s a great option for disciplined savers who don’t mind a few conditions in return for higher potential growth.

What are the rates?

The Bonus Reward Saver features:

• A variable interest rate
• A base rate of interest
• Bonus interest, payable when conditions are met

To earn the bonus interest, you'll need to:

• Make at least one deposit of $100 or more, and
• Make no withdrawals during that month

If you don’t meet these conditions, your savings will still earn the base rate of interest.

Key features:

• Variable interest rate
• Base and bonus interest structure
• Minimum $100 deposit each month to earn bonus interest
• No withdrawals during the month to qualify for bonus interest
• Interest calculated daily and paid monthly
• No limit on the number of Bonus Reward Saver accounts you can hold
• Online and in‑branch access
• No card access

Additional information to note:

• Maximum balance of $2 million across all your Bonus Reward Saver accounts
• Bonus interest is not paid on balances above $2 million

To sum it up

The Bonus Reward Saver suits members who:

• Want a savings account with higher potential returns
• Are able and intending to make regular monthly deposits
• Are comfortable limiting access to their funds to earn bonus interest
• Still want the option to withdraw funds at call if needed

Comparing the Coastline Savings Account and Bonus Reward Saver Accounts

Choosing a savings account comes down to how you like to save and how much access you need to your money. Here’s a simple breakdown to help you decide:

Coastline Savings Account:
Best suited to members who value flexibility and simplicity. With no monthly deposit requirements and unlimited withdrawals, this account lets you save at your own pace while still earning a variable interest rate. It’s an ideal option for everyday savings, emergency funds, or anyone who wants easy access to their money without conditions.

Bonus Reward Saver:
Designed for disciplined savers focused on earning higher returns. By making at least one $100 deposit each month and avoiding withdrawals, you can earn bonus interest. While access to your funds is still available if needed, the real benefit comes from staying consistent—making this account well suited to goal‑based saving where rewards come from commitment.

Ready to open a Coastline Account?

• Open a Coastline Savings Account
• Open a Bonus Reward Saver

*Please note interest rates are subject to change.

Still deciding? Contact us and we can help