Financial tools
Financial tools with transparent assumptions
Explore calculators, certificate guidance, and protected professional workflows built around visible rules—not unexplained outputs or automated professional decisions.
- Public now
- Information and methodology
- Calculation state
- Held behind accuracy gates
- Protected work
- Authenticated workflows only
Availability boundary
Tools that explain before they calculate.
Tool information is public, but calculations and payroll workflows remain inactive until their formulas, privacy paths, APIs, edge cases, and expert-reviewed tests are approved. No financial output is simulated on these pages.
Public tool map
Public guidance, grouped by readiness
Each entry states what is available now and what is still being reviewed.EMI methodology
Review planned inputs and every decision that must be approved before an instalment or amortization result can be published.
Read the methodology guideCalculator library
See the intended calculator roadmap and the transparent contract required for every formula, assumption, rounding rule, and example.
Explore the calculator libraryCertificate guides
Understand evidence context, preparation boundaries, and the role of independent CA judgment before entering a protected request flow.
Browse certificate guidesRelease standard
Why every tool starts with a rule contract
A polished interface cannot substitute for a reviewable and reproducible method.- 01
Define
Specify inputs, source rules, units, dates, and jurisdiction.
- 02
Explain
Publish formulas, assumptions, precision, and known limits.
- 03
Verify
Test normal, boundary, invalid, and expert-reviewed examples.
- 04
Release
Version the contract and monitor changes without silent drift.
Authenticated tools later
Protected tools stay behind authenticated boundaries
Document repository
Uploads, versions, scan state, and request links require explicit identity and access scope.
Payroll workspace
PF, ESI, tax, rounding, corrections, and effective dates require a reviewed rulebook.
FinCard concept
Scoring, consent, freshness, disclosure, and revocation rules must be approved together.
Start with the method