🏠 Buy Right — or Rent Smart
A home is the biggest purchase of your life and the most emotional. Done right, it's forced savings and stability. Done wrong, it's a wealth shredder that eats a decade. There is no universal answer — only math.
Questions this step answers
Why this matters
Nothing in your 30s moves the needle like housing — in either direction. A well-timed purchase builds equity on autopilot; an overstretched one locks you into a payment that strangles every other goal. Renting, meanwhile, is not "throwing money away" if the difference is invested. The only wrong move is deciding on vibes.
The framework
- The 28/36 rule: housing costs ≤ 28% of gross monthly income; total debt payments ≤ 36%.
- The 5% rule (rent-vs-buy): if 5% of a home's price per year (property tax ~1% + maintenance ~1% + cost of capital ~3%) exceeds your annual rent for a comparable place, renting and investing the difference usually wins. Run both scenarios honestly.
- 20% down avoids PMI and proves you can afford the house — but don't drain your emergency fund to get there.
- Stay 5+ years or transaction costs (6% to sell, moving, closing) eat your equity.
Should I wait for interest rates to drop before buying?
You can refinance a rate, but you can't refinance a purchase price. Buy when your life says buy: you'll stay 5+ years, the payment fits the 28/36 rule, and you have the down payment plus reserves intact. If rates fall later, refinance and pocket the difference. If they don't, you still own the right house. Waiting on the sidelines while prices climb usually costs more than a slightly higher rate.
Should I pause retirement saving to save for a down payment faster?
Never drop below the full 401(k) match — that's free money you'd never get back, and these compounding years are irreplaceable. The compromise: keep the match, pause only the above-match contributions, and put a hard deadline on the sprint — 12 to 18 months. If you can't hit your down-payment target in that window, the house is too expensive right now, not your savings rate too high.
How much house can I actually afford?
A common ceiling is 28% of gross monthly income for the housing payment and 36% for all debt payments. That is the 28/36 rule, not a lender's maximum.
The math: $120,000 income = $10,000/month. 28% → $2,800 housing payment. 36% → $3,600 all debt. With $600/month in car and student loans, the debt side allows $3,600 − $600 = $3,000 for housing — but the 28% ceiling is lower, so your budget is $2,800: the 28% side binds first.
Exception: if your non-housing debts are heavy, run both ceilings and take the lower — the debt side can become the binding one.
20% down or buy sooner with PMI?
20% down avoids PMI and proves you can afford the payment — but don't drain your emergency fund to get there.
The math: on a $400,000 home, 20% = $80,000 down. At 10% down ($40,000), PMI runs roughly 0.5%/year on the $360,000 loan ≈ $150/month until you reach 20% equity, when it can be removed.
Exception: if local prices are rising faster than you can save the rest, buying sooner with PMI can win — run both scenarios with your numbers.
Do this this week
- Calculate your 28/36 numbers with your real income
- Run the rent-vs-buy model for YOUR city and price range
- Get pre-approved (not pre-qualified) to know your real budget
- If renting: set up the automatic investment for the "difference"
⚠️ Common mistakes
- Buying at the max the bank approves (that's their limit, not yours).
- Ignoring maintenance — budget 1% of home value per year.
- Treating a house as an investment instead of a lifestyle choice with investment characteristics.