Compare

How these comparisons work

Most "X vs Y" articles describe both options and stop, which leaves you exactly where you started. Each page here opens with an answer: the option that wins by default, and the one variable that flips it. Below that sits a worked example using figures computed from this site's own calculators, so you can check the reasoning rather than take it on trust.

None of these decisions has a universal right answer. What they have is a default that holds for most people and a small number of conditions under which it does not — and knowing which side of that line you fall on is usually the whole question.

Where a comparison turns on a number you can compute, the relevant calculator is linked from the page. Run it with your own figures before acting on any general recommendation, including these.

What makes a comparison decidable

A comparison is worth writing when the two options are genuinely close for some people and clearly separated for others. If one choice wins for nearly everyone, the honest article is one sentence long. If the answer depends entirely on circumstances no general page can know, the useful thing is to name the circumstance rather than to hedge.

The pages here are built around that hinge. HELOC versus cash-out refinance turns almost entirely on whether your existing mortgage rate sits above or below what you could refinance into, because a cash-out reprices the whole balance to reach a fraction of it. Roth versus traditional turns on whether your tax rate in retirement will be higher or lower than it is today, and almost nothing else. Buying versus renting turns on how long you will stay, since transaction costs are front-loaded and only amortise with time.

Naming the hinge is more useful than listing features, because it tells you what to go and find out. Once you know the question is "how long will I stay", you can answer it. A table of advantages and disadvantages leaves you weighing items that are not commensurable.

How to read the verdicts

Each verdict states a default, not a rule. Defaults are written for the situation most readers arrive in, and every page names the conditions that reverse it. If one of those conditions describes you, the default does not apply and the page says so explicitly rather than leaving you to infer it.

The worked figures exist so the reasoning can be checked. They are computed rather than illustrative, which also means they are tied to the assumptions printed alongside them — a rate, a balance, a term. Change the assumption and the conclusion can move, which is the point of showing the arithmetic instead of asserting the answer.

Where a decision has consequences that are hard to reverse — an enrollment window that closes, a tax election that binds for the year, a loan that resets a term — the page flags it. Those are the cases where being roughly right in advance beats being precisely right afterwards.