Loan Traps

Why Did My Solar Loan Payment Suddenly Jump?

June 25, 2026 · 5 min read

Part of the complete guide: Solar Loan Help in Florida: Every Lender & the Holder Rule →

Your payment was fine for a year and a half — then it jumped. This is a built-in feature of many solar loans, and a lot of homeowners were never told.

If your solar loan payment was manageable for the first 16 to 18 months and then suddenly jumped, you didn't do anything wrong — and the loan isn't broken. That jump is built into how many solar loans are designed.

Many solar loans from GoodLeap, Mosaic, Sunlight, and others assume you will make a large 'voluntary' prepayment — usually around 30% of the loan, the amount of the federal tax credit — within the first year and a half. If you make that prepayment, your monthly payment stays low.

What's on this page

Every section in this article, and what each one covers

1.The tax-credit balloon, explainedOne paragraph and a callout, naming GoodLeap and 30%.
2.What to doA three-item list (Pull your loan agreement; ...), naming the Holder Rule and TILA.

Also on this page

an opening passage above the first heading (1 paragraph)
a checklist (3 items in all)
one callout
an FAQ (2 questions)

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Frequently asked questions

Why did my solar loan payment go up after 18 months?

Most likely because the loan assumed you'd make a large 'voluntary' prepayment equal to the federal tax credit (about 30%) within the first 16–18 months. If you didn't, the balance re-amortizes and the monthly payment jumps. Many homeowners were never clearly told about this.

Is the solar payment jump legal?

The structure itself is generally legal, but if it wasn't properly disclosed, or you were promised a tax credit you couldn't actually use, you may have disclosure (TILA) and deceptive-practices claims. Have an attorney review your loan documents.

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