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Trust Your Yacht

The note

Simple interest versus a precomputed boat loan

Same scheduled payment. Different balance when you sell or refinance early. The penalty line is the extra interest the precomputed contract still charges.

Simple interest vs precomputed

The precomputed column uses a Rule of 78s rebate on the scheduled finance charge. Both columns share the same scheduled payment. Payoff month is when you sell, refinance, or pay the note off early.

Scheduled monthly payment

$3,161.50

Total interest if held to term

$358,760.95

Simple interest

Interest paid by month 60
$136,018.69
Balance at payoff
$346,328.46
Scheduled interest avoided
$222,742.25

Precomputed (Rule of 78s)

Interest charged by month 60
$156,678.79
Balance at payoff
$366,988.56

Precomputed penalty

$20,660.10

Extra interest a precomputed contract keeps, compared with simple interest, if the note is paid off at month 60. Your retail installment contract controls the actual rebate.

Loan guides

Finance math

Should You Refinance Your Boat Loan in 2026?

Break-even math on refinancing a $420,000 balance: closing costs, remaining term, and when a 1-point rate drop actually puts cash back in your pocket.

10 min read · Reviewed November 4, 2026 · All