Comparison guides
Plain-English breakdowns of the choices Calcly's calculators help you model. Each one shows the math, walks through the trade-offs, and links the calculators that matter.
Home
8 min read
Rent vs Buy: When does buying actually pay off?
The break-even isn't 'when the mortgage is cheaper than the rent' — it's about transaction costs, taxes, opportunity cost, and how long you stay.
7 min read
15-year vs 30-year mortgage: which is the better deal?
A 15-year mortgage costs roughly half the total interest of a 30-year one. The trap is whether the higher payment crowds out higher-return uses of the same money.
Retirement
Looking for a comparison we don't cover yet? Suggest a guide.