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How to Budget for Expenses That Don't Happen Every Month

Claudia Passarell's profile
By Claudia Passarell
September 24, 2026
How to Budget for Expenses That Don't Happen Every Month

Having a monthly budget is an important part of managing your money. When you know how much you should be spending, you can better control your finances. However, irregular expenses also need to be part of the plan. What do you do with the costs that don’t fit into your monthly financial routine?

Rent is due every month. So are your phone bill, utilities, streaming services, and many other household expenses. However, some of the biggest expenses in your life don’t follow that schedule at all. Vehicles require repairs and ongoing maintenance, homeowner’s insurance is typically an annual bill, and December often brings about holiday expenses that feel like they sneak up on you.

If these unexpected expenses cause financial stress, it may not be a case of irresponsible spending. Instead, you may simply not be planning for the unexpected as well as you should.

Start By Looking Beyond Your Monthly Bills

You probably have a list of monthly costs. However, budgeting for annual expenses requires you to look beyond those expenses. Look back at the past year and make a list of everything you paid for that wasn't part of your normal monthly spending. This might include car registration, insurance premiums, annual memberships, property taxes, professional fees, school expenses, holiday gifts, home maintenance, or travel.

This list doesn’t have to be perfect. Consider using your bank and credit card statements to identify some major expenses that weren’t part of your monthly routine. A $600 insurance payment or $300 car repair can be easy to overlook several months later, particularly if nothing similar has happened recently.

The goal isn’t to build a complex spreadsheet. Instead, this is an opportunity to look at some unexpected expenses that you lost track of while focusing on your monthly budget.

Turn Annual Expenses Into Monthly Numbers

One of the best ways to get a better handle on your annual expenses is to turn them into tangible, monthly figures. For example, if your auto insurance is an annual $1,200 cost, you have 12 months to come up with the funds. That means that you need to budget $100 per month for auto insurance. If you want to break this figure down even further, it comes to $25 per week.

The same idea works for a $240 annual membership, a $600 holiday budget, or $1,000 you expect to spend on home maintenance during the year. Those become $20, $50, and $100 monthly amounts, respectively. You’re not lowering the amount that you spend on these irregular expenses. Instead, you’re breaking them down into smaller, more manageable pieces.

Create A Separate Place For The Money

housewife puts a coin in a jar to save money for the future. after retirement and record keeping of income, expenditure, savings and financial concepts.
Credit: Adobe Stock

You don’t have to establish a separate account for every expense. Instead, consider creating one savings account specifically for planned, irregular expenses. You can track the individual categories on a spreadsheet, budgeting app, or simple note while keeping the money together in the account.

For instance, you might decide to put $50 out of every paycheck into a vehicle repair fund. That would come to $1,200 per year. According to studies, the average cost of annual vehicle repairs is usually between $500 and $1,500 dollars. Having access to $1,200 can help you avoid putting the cost of an unexpected vehicle breakdown on a high-interest credit card, which saves you money in the long run.

Don't Forget Expenses That Are Predictable But Not Exact

There are two different kinds of irregular expenses. The first type is a set amount that you can plan for ahead of time. The auto insurance example discussed earlier is a type of fixed, irregular expense. Unfixed, irregular expenses include things like home maintenance. You don’t know if you’re going to need to replace a window, a relatively affordable fix, or deal with roof damage, which costs much more.

Look at what you've spent in previous years and use that information as a starting point. If you spent $900 on home repairs last year, you could set aside $75 per month this year. If you ultimately spend less, the leftover money doesn't have to disappear. It can remain available for a larger repair later.

Ultimately, you can work annual, irregular expenses into your monthly budget. Once or twice a year, sit down and review your finances and compare the estimates with how much you’re actually spending. The goal is to avoid the financial stress that can come with the large, unexpected expenses that are an unfortunate part of life.


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