How SourcedKit verifies every calculator

Which sources SourcedKit uses

Every numeric value, eligibility rule, timing window, and recommendation on a SourcedKit calculator must come from a primary authority source. In order of preference:

1. Government regulators and agencies: FDA drug labels, CDC guidance, IRS publications, USDA databases, Health Canada, Statistics Canada, IRCC, USCIS.
2. Medical society guidelines: ACOG, ACS, AAP, ACP, AAFP, equivalent Canadian and international bodies.
3. Manufacturer documentation: drug savings card terms, prescribing information, official spec sheets (only when the manufacturer is the only authoritative source).
4. Peer-reviewed research: systematic reviews and meta-analyses, with full citation, only when authority guidance is silent or conflicting.

What we do not accept as a primary source: blog posts, content farms, AI-generated summaries, secondary aggregators, social media, marketing pages without underlying data, or other calculators (citation chains end with the original authority).

How SourcedKit verifies a calculator before publishing

Before any calculator goes live, the editorial team performs the following checks:

• Source verification: every cited URL is loaded manually, the relevant claim is located, and the date the page was last updated by the source is noted.
• Math verification: calculation logic is tested across the full range of valid inputs, including edge cases (zero values, maximum values, ineligibility cases).
• Cross-reference: where multiple authority sources address the same topic, we reconcile differences in the "How this works" section and explain which source we follow.
• Disclaimer review: every calculator carries a domain-appropriate disclaimer (medical, financial, legal) and links to the relevant professional consultation.
• Schema and accessibility: structured data validates against Schema.org, and the page meets WCAG 2.1 AA contrast and keyboard navigation requirements.

How often SourcedKit updates calculators

Authority sources change. Manufacturer savings cards revise quarterly. Medical guidelines update annually or more often. Tax tables change every January. Our review schedule reflects this:

• Quarterly review for calculators tied to commercial offers (drug savings cards, insurance copays, vendor pricing).
• Annual review for calculators tied to medical guidance, tax rules, or government regulation.
• Immediate update when an authority source publishes a material change, or when a reader reports a discrepancy that we verify.

Every calculator displays its last-reviewed date in the page body and in the structured data Google reads. When we update a calculator, we append an entry to the page's changelog and bump the modified date so search engines and AI systems know to re-index.

Who authors and reviews SourcedKit calculators

All calculators are authored and reviewed by the SourcedKit Editorial team. As we grow, we will add named subject matter reviewers (clinicians for medical calculators, CPAs for tax calculators, immigration consultants for visa timing calculators) and disclose their credentials on each relevant page.

We do not use AI to generate calculator copy or source citations. AI tools may assist with code structure or initial drafts, but every published page is manually verified against primary sources by a human editor before deploy.

What SourcedKit will not claim or recommend

• No personalized advice. Calculators produce estimates from the inputs you provide and the sources we cite. They are not a substitute for consultation with a qualified clinician, lawyer, accountant, or licensed professional.
• No diagnoses. Medical calculators do not diagnose conditions or recommend treatments. They surface what authority sources say about timing, dosing, eligibility, and cost.
• No predictions. We report what authority sources currently say. We do not forecast future regulatory changes, market movements, or personal outcomes.
• No undisclosed conflicts. Affiliate relationships are disclosed on every page where they apply. Calculators are not adjusted to favor affiliate partners over accurate guidance.

How to report a calculator error

If you find an error on any SourcedKit calculator, email info@sourcedkit.com with:

• The URL of the calculator
• What you believe is incorrect
• The authority source that supports the correction (if you have one)

We acknowledge corrections within 48 hours and publish verified corrections within 7 days. Substantive corrections are added to the page's changelog with the date and a brief explanation of what changed. We do not silently edit numeric values or guidance without a changelog entry.

How SourcedKit makes money

SourcedKit is independently operated and self-funded. Revenue comes from clearly labeled affiliate partnerships (typically with the same authority sources we cite, such as manufacturer savings card signups), display advertising on selected pages, and a future paid newsletter tier. No source on this site is selected because of a commercial relationship. The reverse is also true: where the best authority source has no affiliate program, we link to it anyway.

We do not accept payment to feature, omit, reorder, or favorably present any calculator result. Our incentive is durable trust, which only works if the math and sources are right.

Contact

For all inquiries (general questions, corrections, press, partnerships): info@sourcedkit.com.

Read more about who builds SourcedKit on the about page.