Each worked example on SimpleFinCalc is built around a specific point of confusion. A page should leave you able to reproduce a result or notice an assumption that could otherwise be missed. This page describes the standards we use for constructing and maintaining that material.
Start with a question that changes the calculation
A saving deadline, a deposit’s timing, a rounded final payment and a bill’s due date create different mathematical questions. We give those questions separate treatment. Changing only a keyword or a dollar amount is not enough reason to create another page.
Make the construction visible
Every case states its starting amounts and timing rules. We call it hypothetical because it is: these are designed examples, not customer stories or anonymized financial records. Choosing round numbers where possible makes the arithmetic easier to audit. More detailed cases retain cents so rounding effects remain visible.
Show more than a headline answer
A useful example includes intermediate steps, a downloadable table, the assumptions held constant, an easy mistake to avoid and a question you can answer yourself. Where a screenshot adds value, it is captured from the working tool. Charts are generated from the described numbers rather than drawn to suggest an outcome.
Separate references from verification
Primary references explain financial concepts and terminology. They do not endorse this site. Our own formula tests and independent decimal recurrence check the documented mathematical models. Neither a source link nor a passing test establishes that a simplified result matches every bank or lender.
Be clear about responsibility
The site owner receives corrections at yjh@dgvantage.com. Development and explanatory drafts use AI assistance, as disclosed on our methods page. We do not claim an expert editorial board, professional financial review, customer testimonials or a certified calculation engine.
Correct the result and its dependents
When a reproducible error is confirmed, the correction should cover the formula, affected examples, screenshots and downloadable files. A date change by itself is not a content improvement. A model change should be described alongside its effect so readers can tell whether their earlier result is affected.
Release notes — October 22, 2026
- Added one-variable comparisons for savings deadlines, compound-rate assumptions and user-selected reserve targets.
- Added a loan schedule selector and a first-payment explanation so the three repayment scenarios can be inspected individually.
- Added worked cases for the first three loan payments and the first-year catch-up for an annual bill.
- Added article navigation, common mistakes and self-check questions. Fixed mobile table overflow during browser checks.
See How we calculate for formula conventions and executable checks, or send a correction with non-sensitive example inputs.