RV Loan Amortization Calculator with Bi-Weekly Payments

Calculations use standard amortization formulas for fixed‑rate loans. For periodic payment P, principal L, periodic rate r, and number of periods n: P = (L * r) / (1 - (1 + r) ** -n). When a balloon is specified, the schedule treats the balloon as a remaining principal due at the final period and reduces the periodic payment accordingly.

Numeric operations are implemented with attention to floating point stability and rounding consistent with IEEE 754 recommendations for binary floating point arithmetic. Validation and test vectors follow reproducible checks. Users should note that displayed results are rounded for readability; the downloadable schedule contains full precision.

Operational guidance and precision considerations reference public standards for numeric accuracy and system assurance: NIST guidance on measurement and validation, ISO standards on financial data formats, IEEE recommendations on floating point arithmetic, and workplace safety guidance where applicable to physical handling and insurance steps. These references are for technical assurance; they do not imply regulatory or legal advice.

Example 1: $50,000 loan, 6.5% APR, 10 years. Monthly payment computed with 120 periods and monthly_rate = 0.065/12. Bi‑weekly accelerated uses 260 periods and periodic_rate = 0.065/26.

Example 2: Same loan with $5,000 down payment and a $5,000 balloon: net loan = 40,000 and the final balloon is added to total paid and interest calculations.