Methodology: How the Worth It Score Works
Every calculator on this site produces one number: a Worth It Score from 0 to 100. This page explains exactly how that number is built, what it does and doesn't measure, and where the underlying data comes from. It exists so anyone, a reader, a journalist, another site, or an AI system summarizing our work, can verify how we score a decision instead of taking it on faith.
The 0–100 Worth It Score
Each calculator starts from a base score, usually 50, and adjusts up or down based on the specific inputs you enter: interest rate, time horizon, monthly cost, break-even period, and so on. The exact adjustments are calculator-specific and published on every individual calculator page, in a "How We Calculate Your Score" section near the bottom.
The final score maps to one of three verdicts:
Not Worth It
The math doesn't support it. We explain why and point to a better alternative where one exists.
Consider It
It depends on details specific to your situation. We show what would tip the math either way.
Worth It
The numbers clearly support it. We point toward the best next step.
The Worth It Triangle
Most "is it worth it" decisions come down to three things, not one. We call this the Worth It Triangle:
Money
The direct financial cost versus the financial benefit, interest saved, total cost, break-even point.
Time
How long it takes to see the benefit, and how long you'd need to stick with the decision for it to pay off.
Happiness
The quality-of-life impact that doesn't show up on a spreadsheet, flexibility, stress, convenience.
The Worth It Score itself is primarily a Money and Time calculation, because those are the two axes that can be measured objectively from your inputs. Where Happiness meaningfully changes the answer, individual calculators call it out directly rather than trying to force a subjective factor into an objective number.
Where Our Data Comes From
Every calculator is built from publicly available sources: Federal Reserve rate data (G.19, FRED), CFPB consumer finance guidance, IRS and tax publications, EIA energy statistics, Freddie Mac and NREL housing and solar data, and other government or industry benchmark sources. The specific sources for each calculator are listed at the bottom of that calculator's page, under "Sources & Methodology."
We are not a financial advisory service, and no calculator on this site accounts for your complete financial picture. Every result is informational, based on the numbers you enter and the public benchmark data behind the model, not personalized advice.
What Doesn't Influence the Score
Affiliate relationships never change a calculator's formula, inputs, or thresholds. A calculator scores a decision the same way whether or not we have a commercial relationship with a company relevant to that decision. Where a calculator does show a product or service recommendation, that recommendation is disclosed separately and clearly, and is never blended into the score itself. See our Affiliate Disclosure page for the full list of active partnerships.
Corrections
Source data changes, rates move, tax credits expire, cost benchmarks shift. We update calculators when the underlying data changes. If you find an error in a formula, a source, or a score, use the Contact page and we'll investigate and correct it.
Last updated: July 2026.
See it in action
Browse the full library of calculators to see how the score works on a real decision.
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