Direct answer
Your first scheduled payment is mostly interest because interest accrues on the entire balance you borrowed. Early on that balance is at or near the original principal, so the interest portion of a fixed payment is large. What is left—often modest at first—pays down principal.
Why it works that way
Lenders do not “take interest first” to punish you. They charge interest for the period on what you owe. When you owe the most, you pay the most interest. As principal shrinks, the same payment shifts toward principal.
What each piece of the payment is
Interest portion ≈ f( outstanding balance , rate , time in period ) Principal portion = scheduled payment − interest (standard amortizing loan)
Your note defines the rate and how a period is counted. The APR story is separate from this monthly split.
Quick mental picture
Imagine a fixed payment where interest alone would “almost” equal the whole check at the start. Principal in month one is thin by design. A few years in, the same payment covers less interest and more principal because the balance fell.
Model your split
Go deeper
Full framework: Loan payments explained. Next: Amortization for the full schedule.
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FAQ
- Will my payment always be mostly interest?
No. As the balance drops, interest drops. The share going to principal rises over time on a standard fixed amortizing loan.
- Is the first payment different from other early months?
Usually similar to other early payments unless your first period is a short or long month per your closing date and day-count rules.