Are the ByTheMath rate widgets free?

Yes. The widgets are free for any website, blog or newsletter page that can run a script tag. The only condition is that the "Data: ByTheMath" attribution link stays visible and unmodified.

How often do the widget rates update?

The rate data is rebuilt automatically whenever the underlying rates change, checked several times a day. Every widget shows the date its rates were last verified at the source.

How are the rates in the widgets ranked?

By the numbers only. Rows are ranked by APY among accounts with no qualifying conditions that are open nationwide (or, for state widgets, open to residents of that state). No institution pays to appear or to rank higher.

Free for publishers

Embeddable rate widgets

Put a live, independently ranked table of the best savings, CD, state, I bond or T-bill rates on your site with one snippet. No API key, no cost, no ads — rates refresh automatically (last verified October 9, 2026). Just keep the “Data: ByTheMath” link.

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Widget types

savings
Top 10 nationwide high-yield savings and money market accounts with no rate conditions.
cd + data-term
Top 10 nationwide CDs for 3, 6, 12, 18, 24, 36 or 60 months.
state + data-state
Top 5 savings and 12-month CDs open to residents of a state (two-letter code), local banks and credit unions included.
ibond
Current Series I bond composite, fixed and inflation rates.
tbill
Latest 4-, 13-, 26- and 52-week Treasury bill auction investment rates.

Options: data-rows (1–10; 1–5 for state widgets) and data-theme (auto, light, dark). The widget renders in its own Shadow DOM, so your site’s CSS won’t break it and it won’t touch yours. It loads one small script (under 8 KB) and one JSON file from bythemath.com — no cookies, no tracking.

Terms of use

Free. Use the widgets on any number of sites, commercial or not.
Attribution required. The “Data: ByTheMath” link must stay visible, clickable and unaltered (no nofollow added).
No modification of data. Don’t change, reorder, filter or re-label the rates, or present them as your own.
The link must stay. Don’t hide or remove the attribution or the product links. We may stop serving widgets to sites that do.
Rates are informational, not an offer or advice. Confirm terms with the institution before opening an account. See our Terms of Use.

Need the full dataset? 3,900+ products, every field, JSON.

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Questions

Are the ByTheMath rate widgets free?: Yes. The widgets are free for any website, blog or newsletter page that can run a script tag. The only condition is that the "Data: ByTheMath" attribution link stays visible and unmodified.
How often do the widget rates update?: The rate data is rebuilt automatically whenever the underlying rates change, checked several times a day. Every widget shows the date its rates were last verified at the source.
How are the rates in the widgets ranked?: By the numbers only. Rows are ranked by APY among accounts with no qualifying conditions that are open nationwide (or, for state widgets, open to residents of that state). No institution pays to appear or to rank higher.