Fidamen

RV Loan Refinance Calculator

This calculator helps RV owners evaluate whether refinancing their existing loan is likely to save money and how switching to bi‑weekly payments changes interest costs. Enter your current loan details and the refinance offer; the tool compares periodic payments, total interest, and net savings.

It supports fees and an optional balloon (residual) payment. Results are estimates intended for planning and decision support; always verify final terms with your lender and read loan disclosures for exact APR, fees, and payment schedules.

Updated Nov 15, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 2332f78884db • Reviewed by Fidamen Standards Committee

Compute periodic payments, total interest, and net savings comparing your existing loan to a refinance offer using the same amortization formulas for both payment frequencies.

Inputs

Results

Updates as you type

Current periodic payment

-$4.17

Current remaining interest

-$50,250.00

Refinance periodic payment

-$3.51

Refinance total interest

-$50,710.42

Estimated net interest savings

$460.42

OutputValueUnit
Current periodic payment-$4.17USD
Current remaining interest-$50,250.00USD
Refinance periodic payment-$3.51USD
Refinance total interest-$50,710.42USD
Estimated net interest savings$460.42USD
Primary result-$4.17

Visualization

Methodology

The calculator uses standard amortization (annuity) formulas: periodic payment = principal × r / (1 − (1 + r)^−N), where r is the periodic rate and N is the number of periods. For refinance calculations the principal is current balance plus disclosed fees.

Bi‑weekly schedules are modeled with 26 payment periods per year. The tool computes total interest by summing periodic payments plus any balloon and subtracting the financed principal (balance + fees).

Outputs intentionally use conservative assumptions: interest computed on scheduled amortization without optional extra payments unless you explicitly change the payment frequency to bi‑weekly.

Key takeaways

Use the 'Refinance vs Current Loan' view to see a side‑by‑side comparison of periodic payments and total interest.

Use the 'Bi‑Weekly Payment Effect' view to estimate additional interest savings and payment differences when moving to 26 payments per year.

All outputs are estimates. Confirm with lender disclosures before making financial decisions.

F.A.Q.

Does the calculator include fees when comparing refinance offers?

Yes. The refinance principal equals your current balance plus the refinance fees entered. Fees increase the financed principal and reduce net savings accordingly.

How is bi‑weekly different from making half‑monthly payments?

Bi‑weekly means 26 payments per year (every two weeks). Half‑monthly (twice per month) results in 24 payments per year and a different effective schedule. This tool models true bi‑weekly schedules as 26 payments per year.

Are results exact?

Results are estimates. Actual loan documents, rounding rules, and lender accrual methods can change payments and total interest. Use estimates for planning, and verify numbers with lender disclosures.

What if I already make extra/irregular payments?

This calculator assumes only the scheduled payments you select. To model extra principal prepayments, subtract the extra principal from the balance or use an amortization schedule tool that supports additional payments.

Sources & citations

Further resources

Versioning & Change Control

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

Record ID: 2332f78884db

What changed (latest)

v1.0.0 • 2025-11-15 • 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 15, 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 • 2025-11-15 • 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: f0ec18e3c492