Finance · ~8 min read

Buy a house

Is buying smarter than renting for the next decade — and what payment can you actually carry?

Price the payment, not the purchase

Start with the Mortgage calculator. Principal, rate, term, and any property tax or insurance you want rolled in. The monthly payment is the number that has to fit the budget — list price is just the input that produces it.

Rule of thumbA rough payment check: at ~6% for 30 years, every $100k borrowed is about $600/month of principal & interest.

Compare renting to buying on the same horizon

Rent vs Buy folds in the same purchase price, down payment, rent, appreciation, and investment return assumptions. The “winner” is horizon-dependent — five years often favours renting; twenty often favours buying if you stay put. Change the years and watch the answer flip.

Rule of thumbIf you move in under ~5–7 years, transaction costs often erase the ownership advantage.

Price opportunity cost with the rule of 72

Money not locked in a down payment can compound elsewhere. The Compound Interest tool (and the rule of 72) shows how long capital takes to double at a given return — useful for “what else could this cash have done?” without pretending markets are certain.

Rule of thumbYears to double ≈ 72 ÷ annual return %. At 8%, about nine years; at 6%, about twelve.

Share the decision frame

Snapshot the mortgage payment card and the rent-vs-buy headline. Two images beat a spreadsheet dump when you’re aligning with a partner or advisor — and everything stays on-device until you choose to share.

Payment → comparison → time value

You didn’t get a yes/no from the internet — you got a chain of defensible numbers you can re-run with your own assumptions.

Reference only. Stories chain real tools — verify numbers before relying on them.