Major Purchases
Big-ticket decisions are where the real money is won or lost. A bad car purchase costs $5,000-15,000 in excess expense. A bad home purchase can cost hundreds of thousands. Get these right and the small stuff barely matters.
Buying a Car
New vs. Used
| Factor | New | Used (2-4 years old) |
|---|---|---|
| Price | Full MSRP ($35,000 avg) | 30-50% less |
| Depreciation (year 1) | 20-30% loss | Already absorbed |
| Depreciation (years 2-5) | ~15% per year | ~10% per year |
| Interest rates | Lower (0-5%) | Higher (4-8%) |
| Maintenance (years 1-3) | Warranty covers | May need some work |
| Technology/safety | Latest features | 2-4 years behind |
| Insurance | Higher | Lower |
| Selection | Exactly what you want | What's available |
The math is clear: A 2-3 year old car with 20,000-40,000 miles is the sweet spot. Someone else paid the steepest depreciation, you get a nearly-new car, and often remaining factory warranty.
Depreciation Reality
| Year | New Car Value ($35,000) | Annual Loss |
|---|---|---|
| 0 (purchase) | $35,000 | N/A |
| 1 | $27,000 | $8,000 |
| 2 | $23,000 | $4,000 |
| 3 | $20,000 | $3,000 |
| 5 | $15,000 | $2,500/yr avg |
| 7 | $11,000 | $2,000/yr avg |
| 10 | $7,000 | $1,300/yr avg |
Lowest cost of ownership: Buy at 2-3 years, drive to 8-10 years.
How Much Car Can You Afford
| Rule | Guideline |
|---|---|
| 20/4/10 Rule | 20% down, 4-year loan max, total costs under 10% of gross income |
| Total car cost | No more than 35% of annual gross income |
| Monthly payment | No more than 10% of monthly take-home |
| Total transportation | No more than 15% of take-home (payment + insurance + gas + maintenance) |
Example on $70,000 salary ($4,500/month take-home):
- Car value: $24,500 max (35% of income)
- Monthly payment: $450 max (10% of take-home)
- Total transport budget: $675/month (15% of take-home)
Financing a Car
| Source | Typical Rate | Best For |
|---|---|---|
| Credit union | 4-7% | Usually best rates |
| Online lender (LightStream, etc.) | 5-8% | Good alternative |
| Manufacturer financing | 0-5% (promotional) | New cars, excellent credit |
| Dealer financing | 5-12% | Convenience, but shop around first |
| Personal savings | 0% (pay cash) | Best if you have the funds |
Always get pre-approved before visiting a dealer. This gives you a baseline rate and negotiating power. The dealer can try to beat your pre-approval.
Negotiation Tactics
| Tactic | How |
|---|---|
| Research fair price | KBB, Edmunds, TrueCar. Know the market price before you walk in |
| Get pre-approved | Bank or credit union, before dealer visit |
| Negotiate one thing at a time | Price first, then trade-in, then financing. Never let them bundle |
| Email multiple dealers | Get quotes via email, pit them against each other |
| Walk away | Your strongest tool. If the deal isn't right, leave |
| End of month/quarter | Salespeople have quotas; more flexible at period end |
| Ignore monthly payment talk | Dealers stretch terms to make payments look small; focus on total price |
| Skip add-ons | Extended warranty, paint protection, fabric coating, VIN etching: all high-margin, low-value |
| Check the financing markup | Dealers mark up the rate by 1-3%. Compare to your pre-approval |
Total Cost of Ownership
People fixate on purchase price and ignore ongoing costs:
| Cost | Annual Estimate | 5-Year Total |
|---|---|---|
| Depreciation | $2,000-8,000 | $10,000-40,000 |
| Insurance | $1,200-2,400 | $6,000-12,000 |
| Fuel | $1,200-3,000 | $6,000-15,000 |
| Maintenance | $500-1,200 | $2,500-6,000 |
| Registration/taxes | $200-500 | $1,000-2,500 |
| Total | $5,100-15,100 | $25,500-75,500 |
The car payment is often less than half the total cost of ownership.
Reliable Used Car Strategy
- Research reliability ratings (Consumer Reports, J.D. Power)
- Pick 3-5 models known for longevity (Toyota, Honda, Mazda are consistently top-rated)
- Search within 100 miles for best selection
- Get vehicle history (Carfax/AutoCheck)
- Hire an independent mechanic for pre-purchase inspection ($100-200)
- Never skip the inspection, it's the best $150 you'll spend
Buying a Home
Can You Afford It
| Rule | Guideline |
|---|---|
| 28% rule | Monthly housing costs (PITI) ≤ 28% of gross income |
| 36% rule | Total debt payments ≤ 36% of gross income |
| 3x income | Home price ≤ 3x annual gross income (conservative) |
| Emergency fund | Keep 3-6 months expenses AFTER closing |
PITI: Principal + Interest + Taxes + Insurance
Example on $100,000 household income:
- Monthly housing budget: $2,333/month max (28%)
- Home price: ~$300,000 (3x income, conservative)
- Down payment: $60,000 (20%)
- Mortgage: $240,000
Down Payment
| Down Payment | Pros | Cons |
|---|---|---|
| 20%+ | No PMI, lower payments, better rates | Large upfront cost, less liquidity |
| 10-19% | Moderate balance | PMI required ($50-200/month) |
| 5-9% | Lower barrier to entry | Higher PMI, higher payments |
| 3-3.5% | Minimum (conventional/FHA) | Highest PMI, most expensive long-term |
| 0% | VA/USDA loans | Only for qualified military/rural |
PMI (Private Mortgage Insurance): Required below 20% down. Costs 0.5-1.5% of loan annually. Drops off at 80% LTV (loan-to-value) for conventional loans.
Don't drain your savings for a larger down payment. Having $0 in savings after closing is dangerous.
Mortgage Types
| Type | Rate | Payment | Best For |
|---|---|---|---|
| 30-year fixed | Higher | Lower monthly | Most buyers (predictable) |
| 15-year fixed | Lower | Higher monthly | Can afford it, want to pay less interest |
| 5/1 ARM | Lowest initially | Adjusts after 5 years | Moving within 5-7 years |
| 7/1 ARM | Low initially | Adjusts after 7 years | Moving within 7-10 years |
| FHA | Market + MIP | Standard | Lower credit scores, 3.5% down |
| VA | Low, no PMI | Standard | Veterans/active military |
30-year vs. 15-year on $300,000:
| Term | Rate | Monthly Payment | Total Interest Paid |
|---|---|---|---|
| 30-year | 7.0% | $1,996 | $418,500 |
| 15-year | 6.5% | $2,613 | $170,400 |
| Difference | N/A | $617/month more | $248,100 less total |
Closing Costs
Budget 2-5% of the purchase price for closing costs:
| Cost | Typical Range |
|---|---|
| Loan origination fee | 0.5-1% of loan |
| Appraisal | $300-600 |
| Inspection | $300-500 |
| Title insurance | $500-1,500 |
| Title search | $200-400 |
| Attorney fees | $500-1,500 (varies by state) |
| Recording fees | $100-250 |
| Escrow deposits | 2-6 months of taxes/insurance |
| Prepaid interest | Varies by closing date |
| Total on $300,000 home | $6,000-15,000 |
Hidden Costs of Homeownership
People budget for the mortgage but forget everything else:
| Cost | Annual Estimate | Notes |
|---|---|---|
| Property taxes | 1-2% of home value | $3,000-6,000 on $300,000 home |
| Home insurance | $1,000-3,000 | Varies by location |
| Maintenance | 1-2% of home value | $3,000-6,000/year average |
| HOA fees | $0-6,000 | If applicable |
| Utilities (difference vs. renting) | $1,000-3,000 more | Larger space, more responsibility |
| Lawn care | $500-2,000 | If not DIY |
| Pest control | $200-600 | Preventive maintenance |
| Major repairs fund | 1% of home value | Roof, HVAC, plumbing, electrical |
True monthly cost of a $300,000 home:
| Item | Monthly |
|---|---|
| Mortgage (P&I) | $1,996 |
| Property taxes | $375 |
| Home insurance | $167 |
| Maintenance/repairs | $375 |
| PMI (if applicable) | $125 |
| HOA (if applicable) | $250 |
| Total | $3,288 |
vs. the $1,996 "mortgage payment" people focus on.
The Home Buying Process
| Step | Timeline | Action |
|---|---|---|
| 1 | 12+ months before | Check credit score, fix issues, save for down payment |
| 2 | 6 months before | Get pre-approved (not pre-qualified, pre-approved) |
| 3 | 3-6 months before | Start house hunting, hire a buyer's agent |
| 4 | When ready | Make an offer (based on comps, inspection contingency) |
| 5 | Offer accepted | Home inspection ($300-500): non-negotiable |
| 6 | After inspection | Negotiate repairs or credits |
| 7 | 2-4 weeks before close | Appraisal, final loan approval |
| 8 | Closing day | Sign documents, pay closing costs, get keys |
Never skip the home inspection. A $400 inspection can reveal $50,000 in hidden problems.
Rent vs. Buy Decision
It's not always obvious. Consider:
| Factor | Favors Buying | Favors Renting |
|---|---|---|
| Time horizon | Staying 7+ years | Moving within 5 years |
| Market conditions | Reasonable price-to-rent ratio | Overvalued market |
| Flexibility needs | Stable life/career | Uncertain or changing |
| Maintenance willingness | Enjoy or can hire out | Don't want the responsibility |
| Local economics | Rent ≈ PITI + maintenance | Rent << true ownership cost |
| Financial readiness | 20% down + emergency fund intact | Would drain all savings |
Use the 5% rule from 02-debt.md as a quick comparison.
Major Appliances and Furniture
When to Buy New vs. Used
| Buy New | Buy Used |
|---|---|
| Mattresses (hygiene) | Furniture (solid wood holds up) |
| Anything with warranty you'll use | Tools (quality brands last forever) |
| Safety equipment | Books, media |
| Items where efficiency matters (appliances, HVAC) | Exercise equipment |
| Technology that's rapidly improving | Kitchen items (cast iron, good knives) |
Timing Major Purchases
| Item | Best Time to Buy |
|---|---|
| Appliances | Presidents Day, Memorial Day, Black Friday, holiday weekends |
| Furniture | January, July (clearance), Presidents Day |
| Mattresses | Presidents Day, Memorial Day, Labor Day |
| Cars | End of model year (Sept-Nov), end of month/quarter |
| Electronics | Black Friday, Amazon Prime Day |
| HVAC systems | Spring and fall (off-peak) |
Finance vs. Pay Cash
| Finance When | Pay Cash When |
|---|---|
| 0% interest promotional offer | Interest rate is above 5% |
| You can earn more investing the cash | Your budget is tight (avoid payment obligations) |
| It's a depreciating asset you need now | You have the cash and no better use |
| The item is essential and you don't have cash | You'd feel better without the payment |
0% financing math: If you can get 0% for 24 months on a $2,000 appliance and invest the $2,000 at 4.5% in a HYSA, you earn ~$180 in interest. Take the 0% deal, pay the minimum, pay it off before the promo ends.
Warning: Deferred interest plans (common at furniture/appliance stores) charge ALL interest retroactively if not paid in full by the end of the promo period. A $2,000 purchase not paid off in 24 months could suddenly owe $500+ in interest. Set a reminder and pay it off a month early.
General Rules for Big Purchases
The Decision Framework
| Question | If Yes | If No |
|---|---|---|
| Do I need this? | Continue | Stop |
| Can I afford it without debt? | Ideal | Consider financing only if essential |
| Have I researched alternatives? | Continue | Research first |
| Have I waited 48+ hours? | Continue | Wait |
| Will this matter in 5 years? | Likely worth it | Reconsider |
| Am I buying for me or for others' perception? | Continue | Stop |
Negotiation Applies Everywhere
| Item | Negotiable? | How |
|---|---|---|
| Cars | Always | Research price, get competing quotes |
| Homes | Always | Make data-based offers below asking |
| Appliances | Sometimes | Ask for floor models, bundle discounts, price matching |
| Furniture | Often | Especially at independent stores, floor models |
| Medical bills | Always | Ask for cash-pay discount, payment plans, negotiate |
| Cable/internet | Usually | Call and ask to cancel; get transferred to retention |
| Insurance | Always | Get competing quotes, ask about discounts |
| Rent | Sometimes | Offer longer lease, prepayment, or off-season move |
Research Checklist
Before any purchase over $500:
- [ ] Define exactly what you need (features, not brands)
- [ ] Research 3-5 options
- [ ] Read reviews from multiple sources (Wirecutter, Consumer Reports, Reddit)
- [ ] Compare total cost of ownership, not just purchase price
- [ ] Check for used/refurbished options
- [ ] Look for seasonal pricing
- [ ] Sleep on it at least 48 hours
- [ ] Check your budget. Where does this money come from?
Key Takeaways
- Cars: Buy 2-3 years used, drive 8-10 years. Avoid new-car depreciation
- Cars: Follow the 20/4/10 rule. 20% down, 4-year max loan, 10% of income
- Homes: True cost is 50-75% more than the mortgage. Taxes, insurance, maintenance
- Homes: Don't buy unless staying 7+ years. Transaction costs eat short-term gains
- Get pre-approved before shopping. For both cars and homes
- Never skip inspections. Car mechanic, home inspector
- Negotiate everything, especially cars, homes, medical bills, and services
- 0% financing is free money if you're disciplined, but deferred interest is a trap
- Sleep on it. 48-hour rule for anything over $500
- Research total cost of ownership, not just the sticker price