Sinking Funds in Canada: What They Are and How Much to Save

A sinking fund is money you set aside in small, regular amounts for a cost you know is coming, so the bill is already paid for when it arrives. The car insurance renewal, the property tax bill, a dentist visit, holiday gifts: none of them is a surprise, but each one can wreck a month’s budget if it lands on a single paycheque. Splitting the cost across the year turns a lump sum into an ordinary budget line.

This page covers which sinking funds a Canadian household budget usually needs, how to work out the amount for each, and where to keep the money. It is one of the guides in the budgeting section.

Sinking fund vs emergency fund

The difference is whether you know the cost is coming. A sinking fund is for expenses you can predict, even if you can’t predict the exact amount; an emergency fund covers what you can’t predict, such as a job loss or a sudden illness. Keeping them apart means a planned bill doesn’t drain the money meant for a real emergency. How much emergency fund you need covers sizing that one and where to keep it.

The sinking funds a Canadian budget usually needs

Most households end up with some version of this list. The point is to catch every cost that arrives once or twice a year rather than every month.

• Car insurance, if you pay it annually or semi-annually instead of monthly.
• Vehicle registration and driver’s licence renewals, where your province charges for them.
• Property tax, if you pay the bill yourself.
• Home repairs and maintenance: appliances, the furnace, the roof, a plumber. Renters may only need a small one for things like moving costs.
• Car repairs and maintenance: tires, brakes, oil changes, the next deductible.
• Gifts: birthdays, weddings and the December holidays. Budgeting for the holidays covers setting the December number.
• Annual subscriptions and memberships: software, streaming plans billed yearly, warehouse club fees, professional dues.
• Vacations: saving for a vacation works through a trip budget and a monthly target.
• Medical and dental costs your benefits plan doesn’t cover, such as glasses or a deductible.
• Kids’ activities: registration fees, camps and school trips that are billed in a lump.

Last year’s bank and credit card statements are the quickest way to build the list: search them for anything that appeared once or twice, and add the amounts up. The guide to tracking your spending covers ways to pull that history together.

How much to put in each sinking fund

The basic formula is the expected cost divided by the number of deposits before it’s due.

• Paid monthly: annual cost ÷ 12.
• Paid every two weeks: annual cost ÷ 26, the number of biweekly paycheques in a year. Budgeting on a biweekly paycheque covers lining up bills with pay dates.
• A cost due sooner than a year away: the amount still needed ÷ the number of paydays left before the due date. Starting a fund late means bigger deposits until the first bill is paid, then the normal amount after that.

For costs that vary, such as repairs, an average of the last two or three years is a reasonable starting point, adjusted if the car or the house is getting older.

Worked example

These are made-up round figures for one household, to show the arithmetic. Your own bills will differ.

Seen as a single number, the total can look large. It isn’t new spending, though: these costs were already in the household’s year, just arriving in lumps. Budgeting for them monthly shows what the year really costs.

Where to keep sinking funds

Sinking fund money gets spent within months, so the usual priorities are that it’s easy to reach and earns some interest while it waits.

• Separate savings accounts or sub-accounts. One account per fund, or one savings account with a spreadsheet or app tracking each fund’s share. Separate accounts make the balances obvious at a glance.
• A high-interest savings account (HISA). Earns interest and keeps the money apart from day-to-day spending. The savings account comparison lists current rates.
• A TFSA. It can hold cash savings, and interest earned in it is tax-free. The catch for money you plan to spend: A withdrawal is added back to your TFSA contribution room on January 1 of the following year, not right away, so putting it back sooner uses other unused room. For a fund that is filled and emptied every year, that can eat into room you meant for long-term savings. The TFSA contribution limit for 2026 is $7,000.

Stocks and other investments can fall in value just before a bill is due, a risk a savings account doesn’t carry.

Sinking funds with other budgeting methods

Sinking funds fit any budgeting method; they are simply a line, or several lines, in the plan.

• In the envelope method, each sinking fund is its own envelope (cash or digital) that carries its balance from month to month.
• In a zero-based budget, the monthly deposits are among the jobs every dollar gets assigned.
• Budgeting software differs in how it handles annual bills; the YNAB review looks at one app’s approach.

If your income changes from month to month, sinking funds work the same way, but the deposits come out of a baseline paycheque; budgeting on an irregular income covers that setup. For a first budget built from scratch, Budgeting 101 walks through every step, including where sinking funds fit.