The Small-Spend Leak Calculator

Try this right now: open your banking app and look at your last 10 card charges. How many were under $15?

If it’s more than three or four, you’ve found the most common money leak there is. A $6 purchase three times a week costs about $936 a year, and because each one is too small to feel like a decision, nobody ever decides to stop.

Why small spends are so sneaky

• They don’t trigger the “is this worth it?” check that a $200 purchase does.
• They happen on autopilot: the coffee on the way to work, the snack at the checkout, the delivery fee because you’re tired.
• Tap-to-pay hides them. No cash leaving your hand, no pause.
• They’re spread across categories. A $4 snack is “food,” a $3 app is “entertainment,” a $7 delivery fee is “other.” No single category looks bad.

The calculator above turns one habit into a yearly number. That number is usually the wake-up call.

“$5 a week” vs. “$5 a workday”

The line from our video — “looks like $5 a week… it’s $1,300 a year” — needs one honest correction: $5 once a week is $260 a year. It’s $5 every workday that adds up to $1,300. How often matters as much as how much:

Each time	Once a week	3× a week	Every workday	Every day
$3	$156	$468	$780	$1,095
$5	$260	$780	$1,300	$1,825
$8	$416	$1,248	$2,080	$2,920
$12	$624	$1,872	$3,120	$4,380

Figures are per year (52 weeks, 260 workdays, 365 days). Find your habit’s row and column — that’s the number to beat.

Some common small-spend leaks

Here are typical examples. Plug your own numbers into the calculator for the real figure.

Habit	Example	Per year
Coffee on the way to work	$5 × 5 days	about $1,300
Gas station snack and drink	$4 × 3 a week	about $624
Delivery fees and tips	$9 × 2 a week	about $936
“Just one thing” online	$12 × 1 a week	about $624
Vending machine at work	$2.50 × 5 days	about $650

For context, the average U.S. household spent $4,142 on food away from home in 2025 — about $80 a week — according to the Bureau of Labor Statistics (BLS). And restaurant prices are rising faster than grocery prices: up 3.5% in the year to September 2026, versus 1.8% for food at home (BLS CPI). Every coffee or lunch bought out is getting a little more expensive relative to making it yourself.

The 14-day leak hunt

The 10-charge test is a quick check. This version gives you a real number:

1. Pick 14 normal days. Not a holiday, not a vacation.
2. Export or screenshot every card and app charge, plus any cash you spend. The CFPB’s free spending tracker worksheet has the columns ready if you prefer paper.
3. Circle every charge under $15.
4. Mark each one planned or unplanned. “Planned” means you’d have bought it if you’d made a list that morning.
5. Add up the unplanned ones and multiply by 26. That’s your yearly leak, roughly.
6. Find your top two. Most people’s leak is two habits, not twenty.

Write the yearly figure somewhere you’ll see it. It’s harder to tap for a $7 smoothie when “$1,820 a year” is on your phone’s lock screen.

Leaks that aren’t purchases: fees

Some of the most common small leaks don’t feel like spending at all, because you didn’t buy anything. When you do the leak hunt, look for these on your statements too:

Fee	Where it shows up	How people usually avoid it
Out-of-network ATM fees	Checking statement, often charged twice (your bank and the ATM owner)	Use your own bank’s ATMs or take cash back at a store
Late fees	Card, utility or phone bill	Autopay for at least the minimum payment
Overdraft or NSF fees	Checking statement	Low-balance alerts; ask your bank about overdraft settings
Delivery and “service” fees	Food and grocery apps	Pickup instead of delivery
Convenience fees	Paying bills or tickets by card	Pay by bank transfer when it’s free
Monthly account fees	Checking or savings statement	Ask what the minimum balance or direct deposit rule is to waive it

A single $35 fee wipes out a week of skipped coffees. Fees are also the easiest leak to fix for good, because one settings change usually stops them permanently.

A weekly 10-minute money check

The leak hunt finds the problem; a weekly check keeps it from coming back. Pick a day — Friday or Sunday works for most people:

1. Open your bank and card apps. Scroll the last seven days.
2. Flag anything unplanned over a small amount you choose — $10 is a good starting line.
3. Move the “skipped” total to savings.
4. Check next week’s calendar for the moments you usually leak: long workdays, kids’ activities, errands near the coffee shop. Plan the snack, the thermos or the packed lunch now.

Ten minutes a week is about nine hours a year. For most people, that’s the best-paid nine hours they’ll spend on money.

How to plug the leak without feeling deprived

You don’t have to cut everything. The goal is to make small spends a choice instead of a reflex.

• Keep your favorite, cut the rest. Love your morning coffee? Keep it. Cut the afternoon snack instead.
• Set a weekly fun-money amount (cash works great — see cash stuffing). When it’s gone, it’s gone.
• Add friction: delete saved cards from apps, log out of shopping sites, turn off one-click buying.
• Pack the “emergency” kit: a snack, a water bottle and a coffee thermos cover most impulse stops.
• The 24-hour rule: anything unplanned waits a day. Most of the time you won’t want it tomorrow.
• Swap, don’t stop: a home coffee setup, a big bag of snacks portioned out, pickup instead of delivery.

A case with numbers: one habit, five years

Say you replace a $5 workday coffee with one made at home. That frees close to $25 a week, minus whatever the beans cost you. If you move a flat $25 a week into a savings account:

Account APY	After 1 year	After 5 years	After 10 years
0.38%	~$1,302	~$6,562	~$13,249
4%	~$1,325	~$7,178	~$15,912

These are simple examples to show how interest adds up on regular deposits, not a promise of any rate; 0.38% is close to the FDIC’s national average savings rate in late 2026. You can test your own numbers on the SEC’s compound interest calculator. Either way, most of the money comes from the deposits, not the interest — which is the point.

The honest limits of the “latte factor”

Cutting coffee won’t fix a budget that’s broken by rent. The average household spent $27,790 on housing and $13,492 on transportation in 2025, compared with $4,142 on food away from home (BLS). Small spends are worth fixing because they’re fast and in your control today. But if your rent, car payment or phone bill is out of line, that’s where the big money is.

A good order of attack:

1. Plug the top two small leaks (this week).
2. Audit recurring charges with the subscription audit checklist (this month).
3. Renegotiate one fixed bill, like your phone plan, insurance or internet (next month).

What not to do

• Don’t cut every treat at once. Total bans tend to end in a splurge. Keep one favorite on purpose.
• Don’t count savings you didn’t move. Skipping a $6 lunch saves nothing if the $6 stays in checking and gets spent on Thursday.
• Don’t swap a leak for a gadget. A $150 espresso machine pays off only if you actually stop buying coffee out — at $5 a coffee, that’s 30 coffees before you’re ahead.
• Don’t track forever. Two weeks gives you the number; after that, set limits and stop logging every receipt.

Move the money the same day

Every time you skip a small spend, transfer that amount to savings right away — even $4. Some people keep a note on their phone called “skipped” and move the total every Friday. It’s the fastest way to fill the squares on a savings challenge or the envelopes in the 100 envelope challenge.