What Is a Sinking Fund and Why Do You Need One?

Published: May 14, 2026 | Reading time: 4 min

What Is a Sinking Fund and Why Do You Need One?

Zero budgeting is all about living on your zero-based income, but that doesn't mean you can't plan for the future. A sinking fund is one of those essential tools that helps you manage unexpected expenses and keep your financial goals in sight. In this article, we'll dive into what a sinking fund is, why it's important, and how to set one up.

What Is a Sinking Fund?

A sinking fund is a dedicated savings account or piggy bank that you use to save money for specific future expenses. These expenses could be anything from car repairs, home maintenance, holiday gifts, or even your child's college tuition. The idea behind it is to set aside funds regularly so that when the time comes, you have the necessary cash on hand without having to worry about how you'll afford it.

Why Do You Need One?

There are several compelling reasons why setting up a sinking fund is crucial for your financial health:

Example of a Sinking Fund

Say you want to buy a new laptop in six months. Instead of saving for it all at once, which might be hard on your budget, you can set aside $50 per month. That way, the purchase won't affect your current spending habits and will feel more manageable.

How to Create a Sinking Fund

  1. Determine Your Expenses: Make a list of recurring expenses that you can predict, like car repairs or annual insurance premiums.
  2. Categorize Them: Group these expenses by type (e.g., home maintenance, education) and decide on the frequency (monthly, quarterly, annually).
  3. Set a Monthly Amount: For each category, calculate how much you need to save monthly. This is typically one-twelfth of your annual cost.
  4. Create an Account: Open a separate savings account or use a specific savings jar in your home budget for this purpose.
  5. Automate Your Savings: Set up automatic transfers from your checking to the sinking fund account so you don’t forget. Many banks offer tools to do this easily.

Tips for Managing Your Sinking Fund

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