How Do I Know If I Can Afford Something?

Updated

You can “afford” anything if you put it on a credit card. That doesn’t mean you can actually afford it. Here’s how to know the difference.

The Real Affordability Test

Can You Actually Afford It? (5 Questions)

# Question If “No”
1 Can you pay for it without going into high-interest debt? You can’t afford it
2 Will you still have your emergency fund intact? You can’t afford it
3 Are you still hitting your savings/retirement goals this month? You can’t afford it right now
4 Would you still buy it if you had to pay cash, in full, right now? You might not actually want it
5 Will you still be happy about this purchase in 30 days? It’s an impulse, not a need

All five need to be “yes” for a purchase to be truly affordable.

“Having the Money” vs. “Affording It”

Situation Having the Money Affording It
$3,000 in checking, want $800 shoes ✅ ❌ (that’s 27% of your balance for shoes)
$15,000 savings, want $5,000 vacation ✅ ❓ (only if $10K still covers emergencies)
$500 in checking, want $200 dinner ✅ ❌ (you’d have $300 until payday)
$50,000 savings, want $2,000 laptop ✅ ✅ (small % of savings, still covered)

The Affordability Framework by Purchase Size

Small Purchases ($10-100)

Test How to Apply
The daily budget test Does this fit within your daily “wants” spending?
The frequency test How often do you make purchases this size?
The substitution test Is there a cheaper alternative that works?

Example: A $15 lunch 5 days a week = $300/month. Each one is “affordable.” Combined, they’re $3,600/year.

Individual purchases can be affordable. The pattern might not be.

Medium Purchases ($100-1,000)

Test How to Apply
The monthly budget test Does it fit in this month’s “wants” category?
The 48-hour rule Wait 48 hours before buying — do you still want it?
The cost-per-use test How much will each use cost? (Price ÷ expected uses)
The opportunity cost test What else could this money do?

Cost-per-use examples:

Purchase Price Uses Cost Per Use
$200 jacket worn 100 times $200 100 $2.00 ✅
$200 jacket worn 5 times $200 5 $40.00 ❌
$600 phone used 3 years $600 1,095 days $0.55 ✅
$150 kitchen gadget used twice $150 2 $75.00 ❌
$80 concert ticket $80 1 $80.00 (personal value call)

Large Purchases ($1,000-10,000)

Test How to Apply
The savings impact test Can you pay without touching emergency fund?
The 30-day rule Wait 30 days — still want it?
The income ratio test Is it less than 5-10% of annual income?
The financing test If financing, is the rate under 5-6%?
The depreciation test What will it be worth in 2 years?

Income ratio examples:

Annual Income 5% = Comfortable 10% = Stretch
$40,000 $2,000 $4,000
$60,000 $3,000 $6,000
$80,000 $4,000 $8,000
$100,000 $5,000 $10,000

Major Purchases ($10,000+)

Test How to Apply
The total cost test Include interest, insurance, maintenance, taxes
The monthly obligation test Monthly payment + existing debt < 36% of income?
The asset vs. expense test Does this build wealth or lose value?
The alternative test Could a cheaper option serve 80% of the purpose?
The stress test Can you afford payments if income drops 20%?

The “Can I Afford This Car?” Test

Real Affordability for Vehicles

Rule Maximum
Purchase price Under 35% of annual gross income
Monthly payment Under 10% of monthly gross income
Loan term 48 months or less (60 max)
Down payment At least 20%
Total car costs (payment + insurance + gas + maintenance) Under 15-20% of take-home pay

Example on $60,000 salary ($5,000/month gross, ~$3,800 take-home):

Rule Maximum What This Means
Purchase price $21,000 Under $21K sticker
Monthly payment $500 Max payment
Total car costs $570-760 Payment + $250 insurance + $150 gas + maintenance

A $35,000 car on a $60,000 salary fails the affordability test even though the dealer will happily approve you.

The “Can I Afford This Subscription?” Test

Monthly Subscriptions Add Up Invisibly

Test Threshold
Total subscriptions Under 5% of take-home pay
Individual subscription Worth it if you use it 4+ times per month
Cancellation test Would you re-subscribe if it cancelled today?

Subscription audit example:

Subscription Monthly Used This Month? Worth It?
Netflix $17.99 8 times ✅
Gym $45.00 0 times ❌ Cancel
Spotify $11.99 Daily ✅
Cloud storage $2.99 Always on ✅
Magazine app $9.99 1 time ❌ Cancel
Meal kit $60.00 2 times ❌ Overpriced
Total $147.96 $87.97 after cuts

Savings: $60/month = $720/year just from cancelling unused subscriptions.

The “Can I Afford to Finance This?” Test

When Financing Is Okay vs. Dangerous

Financing Situation Affordable? Why
0% APR for 12-24 months, item you’d buy anyway ✅ Same price as cash, just spread out
Low rate (3-6%) for necessary purchase (car, appliance) ✅ Manageable cost to preserve cash
Credit card (20-30% APR) for a want ❌ $1,000 purchase becomes $1,200-1,600
Buy-now-pay-later for impulse purchase ❌ Splits pain, not cost
Store credit card (25-30% APR) for sale item ❌ “20% off” destroyed by 25% interest

What Financing Actually Costs You

Purchase Price Method Interest Rate Total Paid Extra Cost
$1,000 Cash 0% $1,000 $0
$1,000 0% APR for 12 months 0% $1,000 $0
$1,000 Credit card, min payments 24% $1,400-1,800 $400-800
$1,000 Store card, 24 months 28% $1,300-1,600 $300-600
$1,000 BNPL, miss a payment 25-36% $1,100-1,400 $100-400

If you can’t pay cash, ask: Am I borrowing because I need to, or because I want something I can’t afford?

The Waiting Period Rule

Wait Before You Buy

Purchase Size Waiting Period
$50-100 24 hours
$100-500 48-72 hours
$500-1,000 1-2 weeks
$1,000-5,000 30 days
$5,000+ 60-90 days

What Happens When You Wait

After waiting What typically happens
24 hours 40-50% of impulse purchases no longer feel necessary
1 week 60-70% feel less urgent
30 days 80%+ — you either forgot about it or found a better option

The purchase that still feels right after 30 days is the one worth making.

The True Cost Calculator

What Things Really Cost (Including Hidden Costs)

Purchase Sticker Price True Annual Cost
$30,000 car $30,000 $8,000-12,000 (payment, insurance, gas, maintenance, depreciation)
$2,000 hot tub $2,000 $600-1,200 (electricity, chemicals, maintenance)
$1,500 dog adoption $1,500 $1,500-3,000 (food, vet, grooming, insurance)
$300 printer $300 $150-400 (ink cartridges)
$200/month gym $200/month $2,400+ (if you add classes, gear, supplements)
$0 “free” timeshare $0 $800-2,000 (annual maintenance fees, forever)

Always ask: What’s the ongoing cost of owning this?

The Opportunity Cost Question

What Else Could This Money Do?

If You Spent Or Invested It (8% for 20 years) Or Invested It (8% for 30 years)
$500 $2,330 $5,030
$1,000 $4,660 $10,060
$5,000 $23,300 $50,300
$10,000 $46,600 $100,600
$25,000 $116,500 $251,600

This doesn’t mean you should never spend. It means every purchase has a hidden price tag: what that money could have become.

A $1,000 purchase doesn’t cost $1,000 — it costs $10,000 in future wealth if you’re 30 years from retirement.

Quick Decision Framework

Before Any Purchase, Ask:

Question If “No”
Do I need this, or do I want this? Apply stricter standards
Have I waited the appropriate time? Wait, then reassess
Can I pay without borrowing? It’s a warning sign
Will my emergency fund survive? Don’t touch it for wants
Am I still saving this month? Delay the purchase
What’s the cost per use? Low = good value
What’s the total cost of ownership? Factor maintenance, ongoing costs
Will I still be glad in 6 months? If unsure, wait

Key Takeaways

  1. “Having the money” and “affording it” are different — affordability means it fits your total financial picture
  2. Pass the 5-question test — no debt, emergency fund intact, still saving, would pay cash, no regrets
  3. Use cost-per-use for medium purchases — a $200 item used 100 times ($2/use) beats a $50 item used twice ($25/use)
  4. Wait 1 day per $100 before buying — most impulse purchases fade
  5. Financing ≠ affording — if you need credit card debt to buy it, you can’t afford it
  6. Cars should cost under 35% of annual income — dealers will approve much more
  7. Factor in the total cost of ownership — sticker price is just the beginning
  8. Every dollar has an opportunity cost — $1,000 today = $10,000 in 30 years invested
  9. Audit subscriptions quarterly — most people find $50-100/month in waste
  10. The purchase you still want after 30 days is the one worth making