Advertising & affiliate disclosure
The short version: the calculators are free because of ads, and the math is never for sale.
How this site makes money
CalcToolVault is free to use and has no subscription. It is paid for by advertising, and in some places by affiliate links — links to a product or service where this site may earn a commission if you sign up or buy. Using one never costs you more than going direct.
What a commission does not buy
It does not buy a better number. No calculator adjusts its math, rounds differently, or changes an assumption because a company pays. The formulas are published on each page precisely so you can check that for yourself, and a formula is either right or it is wrong regardless of who advertises next to it.
It does not buy a recommendation either
This site does not rank, score, or recommend financial products. It does not tell you which lender, broker, card, or insurer to choose. If a link appears, it is a link — not an endorsement, and not advice about your situation.
How affiliate links are marked
Affiliate links are disclosed next to the links themselves, not only on this page, and they carry the rel="sponsored" attribute so search engines can identify them as paid placements.
Advertising
Display ads may be served by third-party ad networks, which set their own cookies and may personalise what you see. That is described in the privacy policy, along with how to opt out.
Not advice
Nothing here is financial, tax, legal, or medical advice. The calculators show the math on the numbers you enter. For anything consequential, it is worth paying a qualified professional.