The Cost Me Blog
On spending, saving,
and seeing it clearly.
Plain-English writing on opportunity cost, compound interest, and the quiet habits that change your financial trajectory. No jargon, no gurus, no “crush your finances” — just the math and the framing, both honest.
What is opportunity cost? A plain-English guide with examples
Every dollar you spend has a hidden price tag: the future version of itself you'll never see. Here's how to think about opportunity cost without an economics degree.
Read →Wealthsimple CDRs explained: what they are, and what nobody tells you about the downside
Buying Amazon stock in Canadian dollars sounds frictionless. The mechanism — Canadian Depositary Receipts — has real benefits and real costs that nobody puts on the marketing page.
Read →Wealthsimple's new family banking: what it solves and what it doesn't
Modern families' money is messy. Wealthsimple's new family-banking suite is the first credible attempt to fix that in Canada. Here's an honest take on what's good, what's missing.
Read →Wealthsimple vs the Big 5: an honest comparison
RBC, TD, BMO, Scotia, CIBC vs Wealthsimple. The marketing pitches differ; the math is more nuanced. Here's the honest comparison across the categories that actually matter.
Read →Wealthsimple Business Chequing: 2.25% interest with one catch
2.25% on business deposits is dramatically better than what RBC or TD pays. But a business chequing account isn't just an interest-rate decision. Here's the full evaluation.
Read →Should you give your kid a Wealthsimple Kids account?
Wealthsimple's Kids accounts launch Fall 2026 with parental interest boosts. The feature is genuinely clever — but the real question is whether your kid needs an app for this lesson at all.
Read →Lease vs buy: the real lifetime cost of how you drive
Leasing locks in payments forever. Buying ties up cash but stops the meter eventually. The honest comparison is more interesting than either side's talking points.
Read →Cut $80/month from streaming without losing what you actually watch
You probably have streaming subscriptions you forgot you have. Here's the rotation strategy that gives you everything you watch for half what you're paying.
Read →Food delivery vs cooking at home: the 30-year math
Convenience has a price tag, and food delivery makes it invisible. Here's what 5 orders a week actually costs you over a working life.
Read →Why lifestyle inflation is the biggest wealth killer
Earning more doesn't make you wealthy. Keeping more does. Here's how lifestyle inflation quietly converts every raise into a higher floor — and what to do about it.
Read →The real cost of gambling: lotto, casinos, sports betting
Casinos aren't villains — they're math. Every game has a known house edge, and that edge compounds against you. Here's what the lottery, slots, and sports betting actually cost.
Read →Why you can't outearn your spending
If you can't manage $50K, you won't manage $500K. Income is leverage; the habits decide which direction the leverage points. Here's the math.
Read →FOMO spending: the psychology and the fix
FOMO is what advertisers buy. Once you can see the pattern, the ads lose most of their grip — and so does most impulse spending.
Read →How Instagram costs you money (and how to stop it)
The algorithm sells you things by showing you people who already own them. Once you can see the trick, the spell weakens — without you having to delete the app.
Read →The mental accounting trap: why we treat money differently based on where it came from
A dollar is a dollar. Your brain disagrees, and that disagreement leaks money. Here's the most important behavioral econ idea you've never been taught.
Read →Loss aversion: why you keep things you'd never buy
If you wouldn't buy it today, you shouldn't keep paying for it. Loss aversion is why we don't apply that test — and how to start.
Read →Decision fatigue and impulse spending (and how to fight it)
By 9pm, your brain is out of willpower. That's exactly when one-tap purchases work best on you. Fix the timing and the discipline takes care of itself.
Read →How much do you really need to retire?
$1 million sounds like a lot until you do the math on 30 years of withdrawals. Here's what the real number looks like — and how to think about getting there.
Read →What does $50/month become in 40 years?
$50/month is the price of skipping two takeout meals. Over 40 years it's the price of a paid-off retirement. Here's the math, broken down by how early you start.
Read →Side income vs spending less: which actually wins?
A $200 side hustle and a $200 spending cut look identical on paper. They're not. One is much more effective in practice — and which depends on your starting point.
Read →The "save half your raise" rule, explained
You won't miss money you never spent. Saving half of every raise is the rule that converts career growth into compounding wealth without lifestyle sacrifice.
Read →Index funds explained: why boring beats clever
The investing strategy that beats most pros is the one that takes 20 minutes to set up and zero attention thereafter. Here's how it works and why it wins.
Read →Dollar-cost averaging: does it actually work?
Conventional wisdom says DCA is always safer. The math says it depends. Here's the honest version, with examples.
Read →The simple 3-fund portfolio
Most investors overcomplicate their portfolio. Three funds, total. Here's the exact recipe, the reasoning behind it, and how to actually buy it.
Read →Why most active investors lose to the index
If the pros can't beat the index, why are you trying? Here's the math on active management's track record — and the structural reasons it doesn't work.
Read →Roth vs Traditional IRA: a plain-English guide
Two account types. Most personal-finance writing makes the choice harder than it is. Here's the actual decision rule that covers almost everyone.
Read →The 4% rule: what it is and why it matters even if you're not retiring
If you can withdraw 4% per year safely, then you need 25× your annual spending to retire. That's the entire FIRE movement in one sentence — and it changes how you think about earning today.
Read →Salary negotiation: the highest-ROI hour of your career
Negotiating once for $5K more isn't $5K. Compounded across raises and future jobs, it's six figures. Here's the framework — and the words to say.
Read →The opportunity cost of unpaid internships
Some unpaid internships pay back enormously. Most don't. Here's how to tell which is which, and what the opportunity cost actually is.
Read →Personal finance in your 20s: the 5 things that actually matter
Most personal-finance advice for 20-somethings is noise. Five things matter dramatically more than everything else combined. Get those right and you're set.
Read →Catching up: personal finance in your 30s and 40s
You missed the easy years. Now you have to be intentional. Here's the playbook that works for people starting at 35, 40, or even 45 — with honest expectations.
Read →How to teach kids about money without lecturing
Lectures don't work. Modeling does. Here's the framework for raising kids who think about money clearly — without becoming the parent who won't stop talking about it.
Read →Rent vs buy: an honest comparison for 2026
Renting isn't throwing money away. Buying isn't always the smart move. Here's the actual math, plus the questions that decide which is right for you.
Read →The lifetime cost of bad financial advice
The wrong advice from the wrong advisor can cost you a million dollars over a career — without anyone breaking a law. Here's how to recognize the patterns.
Read →Where does the money go? An honest breakdown of American household spending
Most people couldn't tell you what their household spends on each category in a given year. Here's the average breakdown — and where the surprising leaks tend to be.
Read →The hidden cost of paying for a storage unit
A storage unit is the perfect financial mistake: small monthly cost, large compounded cost, full of things you've forgotten you own. Here's the audit framework.
Read →Is your $4 daily coffee really costing you $275,000?
You've heard the claim. Skip the daily latte, retire with $275,000 more. But the math behind it is more nuanced — and more interesting — than the headlines.
Read →How to stop impulse spending without willpower
Telling yourself "just don't buy it" doesn't work. Here's what does, based on actual behavioral research — and a 48-hour rule that's deceptively powerful.
Read →The real cost of upgrading your iPhone every 2 years
Apple's upgrade program makes the math invisible: $35/month forever feels free. Stretch that across 40 years and the actual cost reveals itself.
Read →What does "the S&P 500 averages 10% a year" actually mean?
Real returns aren't smooth. Some years are +30%, some are -37%. But the long-run average is remarkably stable — and it's the foundation of every projection Cost Me makes.
Read →Compound interest, explained: why time beats money
Einstein supposedly called it the eighth wonder of the world. He didn't, but the math is wondrous anyway — and most people drastically underestimate it.
Read →5 small purchases that quietly cost you $100,000+ in retirement
Big purchases hurt visibly. Small recurring ones hurt invisibly — and over decades, they cost more. Here are five worth re-examining.
Read →"I deserve it" is the most expensive sentence in personal finance
It's not the spending that's the problem. It's the story you tell yourself before you spend. Reframe the story and the spending takes care of itself.
Read →The 48-hour rule: why a small pause changes everything
It feels too simple to work. But the same brain chemistry that drives the impulse purchase is also what makes the 48-hour rule so effective.
Read →How to actually use an opportunity cost calculator (with examples)
A calculator is only useful if you know how to read the answer. Here's how to interpret an opportunity cost projection in five common spending scenarios.
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