Fidamen

Motorcycle Loan APR Calculator with Extra Payments

This calculator estimates scheduled payments and the effect of recurring extra payments on payoff time and total interest for a motorcycle loan. Enter the loan amount, APR, term, payment frequency and a recurring extra payment amount to see projected savings and time to payoff.

Results are estimates based on level (fixed) interest rate amortization and assume recurring extras are applied to principal at each scheduled payment date. It does not model one-time lumpsum prepayments, fees, penalties, or changes in interest rate.

Updated Nov 3, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 6307deaef962 • Reviewed by Fidamen Standards Committee

Inputs

Results

Updates as you type

Scheduled payment per period (without extras)

$195.66

Actual payment per period (scheduled + recurring extra)

$195.66

Number of payments until payoff with extra payments

60

Time to payoff with extras (years)

—

Total interest paid (scheduled plan)

—

Total interest paid (with recurring extra)

—

Interest saved by making recurring extra payments

—

Months saved vs scheduled plan

—

OutputValueUnit
Scheduled payment per period (without extras)$195.66USD
Actual payment per period (scheduled + recurring extra)$195.66USD
Number of payments until payoff with extra payments60integer
Time to payoff with extras (years)—years
Total interest paid (scheduled plan)—USD
Total interest paid (with recurring extra)—USD
Interest saved by making recurring extra payments—USD
Months saved vs scheduled plan—months
Primary result$195.66

Visualization

Methodology

Scheduled payment uses the standard amortizing loan formula for fixed-rate loans: payment = P * r / (1 - (1 + r)^-n), where r is the periodic interest rate and n the number of periods.

Payoff with recurring extras is calculated by solving the amortization formula for the number of payments when the payment amount increases by the extra payment. For zero interest rate loans the calculator uses a simple principal / number_of_periods fallback.

Calculations follow best-practice numeric routines; results are rounded for display. For high-accuracy or regulatory uses consult financial statements or lender disclosures. See accuracy and standards notes below.

F.A.Q.

Does this calculator compute the legal APR disclosed by a lender?

This tool uses the nominal annual rate and standard amortization math to estimate payments and interest. It does not replace the lender's Truth in Lending disclosure, which may include fees and the exact APR computation method required by law.

Can I use one-time extra payments or apply extras irregularly?

This calculator models recurring extras applied each payment period. One-time or irregular prepayments will change the amortization schedule differently and are not directly modeled here.

Why do results differ from my lender's statement?

Differences can arise from rounding rules, exact day-count conventions, fees, different compounding assumptions, or payment application order. Use lender disclosures for contract-accurate figures.

Are there any safety or regulatory considerations?

This tool is informational only. For binding figures, rely on lender contracts. It does not account for prepayment penalties or tax consequences; consult a qualified advisor.

Sources & citations

Further resources

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: 6307deaef962

What changed (latest)

v1.0.0 • 2025-11-03 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Public QA status

PASS — golden 25 + edge 120

Last run: 2026-01-23 • Run: golden-edge-2026-01-23

Engine

v1.0.0

Data

Baseline (no external datasets)

Content

v1.0.0

UI

v1.0.0

Governance

Last updated: Nov 3, 2025

Reviewed by: Fidamen Standards Committee (Review board)

Credentials: Internal QA

Risk level: low

Reviewer profile (entity)

Fidamen Standards Committee

Review board

Internal QA

Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person

Semantic versioning

  • MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
  • MINOR: New features or fields that do not change existing outputs for the same inputs.
  • PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.

Review protocol

  • Verify formulas and unit definitions against primary standards or datasets.
  • Run golden-case regression suite and edge-case suite.
  • Record reviewer sign-off with credentials and scope.
  • Document assumptions, limitations, and jurisdiction applicability.

Assumptions & limitations

  • Uses exact unit definitions from the Fidamen conversion library.
  • Internal calculations use double precision; display rounding follows the unit's configured decimal places.
  • Not a substitute for calibrated instruments in regulated contexts.
  • Jurisdiction-specific rules may require official guidance.

Change log

v1.0.0 • 2025-11-03 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: 99a555ded0ba