RV Loan Refinance Calculator with Bi-Weekly Payments
This calculator compares your existing RV loan to a refinance offer, supporting monthly and bi-weekly payment schedules and optional balloon payments. It estimates per-period payments, total paid, estimated interest saved, monthly cash flow impact, break-even months for fees, and change in payoff time.
Use the bi-weekly option to estimate the effect of switching from a monthly schedule to a bi-weekly schedule (26 payments per year). Enter 0 for current payment to auto-calculate the implied payment from your balance, rate and remaining term.
Governance
Record d184ee9b9d24 • Reviewed by Fidamen Standards Committee
Calculates period-level rates for monthly or bi-weekly schedules, computes amortizing payments (supports a final balloon), aggregates total paid and interest, then reports estimated savings, break-even and time saved.
Inputs
Results
Current payment (per period)
$684.82
Refinance payment (per period)
$305.18
Total remaining to pay now
$41,088.91
Total to pay after refinance
$39,673.97
Estimated interest saved
$1,914.94
Estimated monthly cash savings
$23.58
Estimated break-even (months)
21.2023
Estimated time saved until payoff (months)
0
| Output | Value | Unit |
|---|---|---|
| Current payment (per period) | $684.82 | USD |
| Refinance payment (per period) | $305.18 | USD |
| Total remaining to pay now | $41,088.91 | USD |
| Total to pay after refinance | $39,673.97 | USD |
| Estimated interest saved | $1,914.94 | USD |
| Estimated monthly cash savings | $23.58 | USD |
| Estimated break-even (months) | 21.2023 | months |
| Estimated time saved until payoff (months) | 0 | months |
Visualization
Methodology
Calculations convert annual nominal rates (entered as APR%) to period rates by dividing by periods per year (12 for monthly, 26 for bi-weekly). The amortizing payment formula is used for fixed payments: payment = r * PV / (1 - (1+r)^-n).
Balloon (final lump) amounts are modelled as a future value; the amortizing portion of the loan is reduced by the present value of the balloon so the periodic payment only amortizes the remainder. Refinance fees are added to the principal before computing the new amortizing schedule.
Key takeaways
Results are estimates for comparison and planning. Small differences in how institutions apply interest, rounding, payment posting dates, compounding conventions, and daily interest accrual can cause differences from lender schedules.
Inputs must reflect nominal APR% and true fees. For best accuracy, use the exact APR and fee amounts provided by the lender and confirm any balloon or prepayment conditions with the lender.
Worked examples
Example: $35,000 remaining at 6.5% with 60 months left vs refinance at 4.5% for 60 months with $500 fees and bi-weekly payments. The tool will estimate the new bi-weekly payment, total interest difference and how many months to recover the $500 in fees based on monthly-equivalent cash savings.
If your refinance includes a balloon, the calculator treats that amount as a future lump sum and computes a smaller periodic payment for the amortizing remainder; total paid includes the balloon at the end.
F.A.Q.
Does bi-weekly mean paying half of a monthly payment every two weeks?
Bi-weekly in this calculator uses 26 payments per year (every two weeks). That is not exactly 24 half-month payments; it results in two extra half-payments per year and slightly faster amortization compared to strictly halving a monthly payment.
How should I enter fees and balloon amounts?
Enter fees as the total upfront amount added to the refinance principal. Enter balloon amounts as the final lump sum expected at loan maturity. If none, enter 0.
Why might the calculator differ from my lender's payoff schedule?
Lenders may use different day-count conventions, post payments on different dates, apply daily interest, or round per-period interest differently. Use outputs here for comparison and ask the lender for an exact payoff schedule.
What should I do if monthly savings are zero or negative?
If monthly savings are zero or negative, the refinance fees are not recovered by monthly cashflow savings under the provided inputs. Consider different terms, rates, or fee negotiation.
Sources & citations
- NIST — Digital and computation standards, general reference — https://www.nist.gov
- ISO — Standards for financial instrument terminology and testing — https://www.iso.org
- IEEE — Numerical methods and best practices for computation — https://www.ieee.org
- OSHA — Safety and operational guidance (contextual reference) — https://www.osha.gov
- CFPB Regulation Z — 12 CFR § 1026.22 Determination of Annual Percentage Rate — https://www.consumerfinance.gov/rules-policy/regulations/1026/22/
- CFPB Appendix J — Annual Percentage Rate Computations for Closed-End Credit — https://www.consumerfinance.gov/rules-policy/regulations/1026/j/
- CFPB Annual Percentage Rate Tables — https://www.consumerfinance.gov/compliance/compliance-resources/other-applicable-requirements/annual-percentage-rate-tables/
Further resources
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: d184ee9b9d24What changed (latest)
v1.0.0 • 2025-11-02 • 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
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-02 • 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 2, 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 • 2025-11-02 • 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: 301bed118ac6
- https://www.consumerfinance.gov/compliance/compliance-resources/other-applicable-requirements/annual-percentage-rate-tables/
- https://www.consumerfinance.gov/rules-policy/regulations/1026/22/
- https://www.consumerfinance.gov/rules-policy/regulations/1026/j/
- https://www.ieee.org
- https://www.iso.org
- https://www.nist.gov
- https://www.osha.gov