Money Guides · The Getting Ahead Guidebook

Sinking Funds Explained: The Simplest Way to Never Be Broke When Big Bills Hit

By Randy Hess · Founder, The Getting Ahead Guidebook

The financial world loves inventing scary-sounding names for boring, obvious ideas. “Sinking fund” is one of them. It sounds like something an accountant does with a green visor. It’s actually the single most powerful move a normal family can make to stop feeling broke.

Here’s the whole idea in one sentence: a sinking fund is money you set aside monthly for a big bill you already know is coming. That’s it. That’s the whole concept.

Why the name confuses everyone

“Sinking fund” is a 200-year-old accounting term from corporate bond markets. It has zero business being applied to household money — but it stuck, because there was no better name. Some people call them “targeted savings buckets” or “envelopes.” Same thing. I just call them reserves in my own house. Whatever word you use, the mechanic is identical.

The difference between a sinking fund and an emergency fund

Emergency Fund	Sinking Fund
For things you don’t know are coming — job loss, ER visit, blown transmission.	For things you do know are coming — property tax, Christmas, car registration, insurance renewal.
Target: 3–6 months of expenses.	Target: exactly what the bill will be.
You should have ONE.	You should have 10–15 of these, one per bill.

These two things are complementary. If you only have an emergency fund, you’ll bleed it every time property tax comes due — because the emergency fund becomes the “annual bill fund” by default. Sinking funds protect your emergency fund.

Most families I’ve helped are working with one giant “savings account” doing four different jobs, and they wonder why it never grows. Split those jobs into separate buckets and everything gets clearer overnight.

The 6-step setup (do this once, forget forever)

1. List every annual bill you have. Property tax, insurance renewals, subscriptions, holidays, kids’ sports, HOA, car registration, vacation, etc. The free worksheet below has 14 of the most common ones pre-loaded.
2. Write down the annual cost of each. Look up last year’s numbers. Round up.
3. Divide each by 12. That’s the monthly reserve for that bill.
4. Add up all the monthly reserves. This number will shock you — but now you know your real cost of living.
5. Open a separate savings account at any online bank (Ally, Marcus, Discover — all pay interest, all free). Set an autopay from your checking that runs the day after payday.
6. When a bill comes due, transfer that reserve back to checking and pay the bill. The money was there all along.

Total setup time: 15 minutes. Total maintenance: about 60 seconds per month to make sure the autopay ran.

How to name your sinking funds so they actually work

Boring names fail. “Fund A” or “Savings 2” get raided within a week. What works is specific, emotional names.

Instead of “Property Tax Fund,” name it “Don’t-Sell-The-House Fund.” Instead of “Christmas Fund,” name it “Christmas Morning Without Debt.” Instead of “Car Registration,” name it “Not Getting Pulled Over in November.” I’m only half joking. Money follows meaning.

In the Getting Ahead Guidebook app you can name each account and reserve however you want — I’ve seen customers name theirs things like “The Great Deck Rebuild of 2027,” “Emma’s Braces,” and “Divorce-Prevention Vacation Fund.” All of those get funded on time. “Savings 3” doesn’t.

The one mistake that kills sinking funds

People keep them in their regular checking account. Don’t do this. If you can see the money, you will spend it. It has to live somewhere separate — a different bank, a different app envelope, a physical envelope in a drawer, anything. Out of sight, out of mind, in place for the bill.

The second most common mistake: skipping months when things get tight. Don’t. If money is tight, that’s the exact reason you MUST fund the reserve — because “tight” today becomes “catastrophic” in November when the bill hits and there’s nothing there.

Sinking funds vs. budgeting apps (and why most people fail with both)

You can absolutely run sinking funds on paper. That’s what the free worksheet below is — a spreadsheet in tree form. You can also run them in an app. What matters is the system, not the software.

Where people fail: they set up 40 elaborate envelopes on Day 1, get overwhelmed, and stop. Better approach — start with 3 reserves you KNOW will happen this year (property tax, Christmas, car insurance renewal). Fund those. Prove the system works. Then add more.

90 days from now you’ll have a functioning system. In a year, you’ll wonder how you ever lived without it.

What the free worksheet does

I built it for my own family. It’s a one-page printable with:

• 14 common reserves pre-loaded (property tax, Christmas, car reg, car insurance, subscriptions, etc.)
• Columns to write in the annual cost, monthly amount, and current balance
• A total row that shows you your REAL monthly cost of being alive
• A 4-step setup checklist on the back

Free. No credit card. No trial. Just the worksheet — because if the paper version works for you and you never buy my app, that’s still a win.

— Randy