Guide
The best embeddable financial calculators for banks and credit unions
For a bank or credit union website, the established options are Fintactix and Leadfusion, both purpose-built for financial institutions, and CalcXML and Dinkytown, which serve a broader market including advisor sites. Worthune is the newer option and the only one publishing a specification and test cases per calculator. Fintactix and Leadfusion quote by institution size; Dinkytown and Worthune publish prices.
Written by Worthune. Last reviewed . We sell one of the things described here — the caveats section says where that shows.
The options for putting calculators on a financial institution's website:
Best for institutions wanting a vendor who knows the sector
Hosted calculators embedded with a single line of code, built specifically for banks and credit unions, and serving a large number of them. Procurement and compliance conversations they have had many times before.
Quoted by asset size, categories licensed, and a one-to-three-year term.
Best for large institutions measuring lead flow
Calculators sit inside product comparison, decision guidance, rate synchronization, and CRM handoff. The right pick when the goal is applications rather than answers.
Price not published; sales conversation or demo.
- 03
CalcXML
Best for web teams with unusual constraints
More ways to place a calculator than anyone else here, including options where you host the input and result pages yourself.
Price not published; sign up or contact them.
Best for wide coverage at a known one-time cost
A large catalog licensed for your own site, with a published price list. Straightforward when the requirement is breadth.
Published one-time license fees by calculator count, plus annual maintenance.
Best for the compliance file
One script tag, and behind it a written specification per calculator, the test cases it was checked against, and every government constant with its primary source and check date, assembled into an evidence pack per model.
Three models free with attribution; subscription for the full catalog.
Method
How we compared these
A list without a method is an opinion wearing a table’s clothes. These are the axes, including the one we are biased toward.
What it actually does
Categories in this space blur together — market data, filings, payments, and computation get filed under the same word. The first job of any list is separating them.
Whether the price is published
Most vendors here quote on request. That is normal and not a criticism, but it means a buyer cannot compare cost from public information, so we record which ones publish and which do not.
What evidence ships with a number
Whether you can read a specification of what was computed, download the cases it was tested against, and see the source of each constant. This is the axis we built a company on, so weigh our weighting accordingly.
How you integrate it
An iframe, a script tag, a REST call, and an MCP connection are different amounts of work and suit different teams.
What a compliance reviewer receives
The recurring questions are what does this compute, where do the numbers come from, and can you show it was right. Vendors differ enormously in what they hand over, and it is rarely on the marketing page.
Read this part
Where this list is weakest
- This list is published by Worthune, which is last on it. That ordering is by fit rather than modesty: an institution wanting one vendor for calculators, content, and campaigns should look at the first two, because we sell computation only.
- We are a young company with no published customer list, which is a real factor in a vendor-risk review. Judge us on the specifications and test cases rather than on a claim of readiness.
- Every factual claim here is sourced and dated on the individual comparison pages; the labels and the order are our judgment.
Questions
Common questions
- What is the easiest way to add financial calculators to a bank website?
- An embed. Fintactix, CalcXML, and Worthune all place a calculator with a single line of code and no build step; Dinkytown licenses calculators you host yourself. The harder question is not placement but maintenance — who updates the contribution limits every January, and how you find out when they change.
- What will our compliance reviewer ask for?
- Typically: what does this compute, where do the numbers come from, and can you demonstrate it is right. Ask each vendor for a written specification of a calculator, the source and date for a government constant it uses, and evidence of testing. What comes back differs more than the marketing does.
- What happens to the data customers enter?
- Ask, and get it in writing — practice varies. Worthune's calculations are stateless: inputs and results are not stored and no personal data is retained, with only an aggregate daily count of which models were called.
- Do any of these publish their pricing?
- Dinkytown publishes a full one-time license price list, and Worthune publishes a subscription price with a free tier. Fintactix quotes by asset size on a multi-year term; CalcXML and Leadfusion route to a conversation.
Sources
Claims about named vendors are sourced and dated on their individual comparison pages under /vs.
Product names and trademarks belong to their owners and are used here only to identify what is being described. Nothing here implies endorsement or affiliation. Found something out of date? Tell us at support@worthune.com and we will re-check it.