Free topic in the app · 100 lessons

Money psychology: the habits and biases behind your spending

Knowing what to do with money is rarely the hard part. These lessons cover why people don't do it: spending rising to match each raise, losses feeling worse than gains, and the small structures that make a habit stick.

Four lessons are below with their quizzes, as they appear in the app (the app uses British spelling).

Lesson 11m 15s read · level 2

Lifestyle creep: the silent retirement killer

You got a 20% raise. You spent 20% more. You're not richer.

RuleSave 50% of each raise

Lifestyle creep (or 'lifestyle inflation') is the tendency to spend more as you earn more. A raise becomes a nicer flat, a better car, more takeaways, and your savings rate stays exactly where it was. Net effect: years of work, zero progress toward security.

Try this Diary your next raise: 50% to savings increase on day one, 50% to lifestyle.

Quick check

When is the best time to defend against lifestyle creep after a raise?

Lesson 21m 35s read · level 2

Habit stacking: anchoring new behaviours to old ones

After morning coffee, check the investment account for 60 seconds. Old habit pulls new behaviour through.

FormulaAfter X, I will Y

Habit stacking attaches a new behaviour to an existing one as its trigger. 'After I do X, I will do Y.' Uses existing neural pathways instead of requiring fresh willpower. For money habits (checking balances, contribution reviews, debt tracking), stacking turns intent into automatic ritual.

Try this Pick one reliable trigger. Attach a 60-second money habit. Let it ride for 6 weeks.

Quick check

Why does habit stacking outperform standalone new-habit goals in practice?

Lesson 31m 30s read · level 1

Why people don't build emergency funds

Everyone agrees emergency funds matter. Most don't have one. The gap is psychological, not financial.

Starter target$500-1,000

Emergency funds are universally agreed upon and almost universally underbuilt. The reasons are behavioural: low immediate reward, abstract future benefit, and the discomfort of holding 'unused' cash. Understanding why your brain resists makes the structural fix actually stick.

Try this Start with $500 in a separate account. Automate. Celebrate. Most crises cap out below this.

Quick check

What's the most common behavioural reason people don't build an emergency fund?

Lesson 41m 50s read · level 2

Co-signing: it's not 'helping out', it's owning the debt

Co-sign a loan? You're equally liable. Their default becomes your debt. Their late payment is your credit score.

RealityYou're equally liable

Co-signing a loan or lease is functionally the same as borrowing the money yourself. You're legally responsible for the full amount if the primary borrower defaults. Their late payment hits your credit. Their bankruptcy is your debt. 'Just helping' doesn't describe the actual exposure.

Try this Co-sign = borrow in their name with your liability. Gift instead, or refuse.

Quick check

What's the actual legal relationship a co-signer has to the loan they co-sign?