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Infinix Calculators
Financial Calculators

Seller Financing & Hard Money Loan Calculator

Calculate owner-financed and hard money mortgage terms. Estimate interest-only payments, balloon payoffs, total finance charges, and amortization schedules.

David Miller, CPA
Formula Verified & Maintained by:David Miller, CPA

CPA, M.S. Finance (NYU Stern) • Lead Financial Analyst & Tax Technology Editor

Peer-Reviewed Algorithm

Interactive Calculator

1. Provide Details

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2. Output Results

Amount Financed (Principal)200000.00 $
Monthly Payment (P&I)1264.14 $
Balloon Payoff (At Year 5)187221.95 $
Total Finance Charge (Interest Cost)63070.12 $

How to Calculate: Formula & Steps

Calculates monthly payments based on loan amortization type, then projects the remaining balance using standard mortgage formulas at the balloon deadline.

Formula Used:Amortized P&I = P × [r(1+r)^n] ÷ [(1+r)^n - 1]; Interest-Only Payment = P × r

Step-by-Step Calculation Example

A $200k loan at 6.5% interest amortized over 30 years with a 5-year balloon requires $1,264/mo with a $187,902 balloon due. If interest-only, the monthly payment is $1,083 with a $200,000 balloon due.

Common Mistakes to Avoid

  • Assuming the loan is fully amortized over the balloon term (a balloon term requires a massive lump-sum payoff at the end).
  • Forgetting to factor in property taxes and insurance when estimating monthly real estate carrying costs.

Practical Use Cases

  • Owner-financed real estate purchases
  • Hard money lender terms modeling
  • Land contract and contract-for-deed planning
  • Equipment or renovation financing estimations

Expert Tips

  • If you are the buyer, ensure you have a clear plan (refinancing or selling) before the balloon payment deadline arrives.
  • Buyers should set up an escrow account for property taxes and home insurance to avoid default risks.

Seller Financing & Hard Money Loans: Balloon Amortization Mechanics

In seller financing (owner carry / contract for deed) and short-term private hard money lending, loan agreements are often structured with 30-year amortizations but carry a 3, 5, or 7-year balloon payment deadline.

The Remaining Balloon Balance Formula

Balloon Balance = Principal × [(1 + r)^n - (1 + r)^p] ÷ [(1 + r)^n - 1]

  • r: Monthly interest rate (Annual APR ÷ 12).
  • n: Full amortization term in months (e.g., 30 yrs × 12 = 360 mos).
  • p: Balloon payment deadline in months (e.g., 5 yrs × 12 = 60 mos).

Amortized vs. Interest-Only Balloon Comparison

Structure ($200k at 7.0% APR)Monthly Payment5-Year Balloon DueTotal 5-Yr Interest Paid
30-Yr Amortized with 5-Yr Balloon$1,330.60 / mo$189,486.20$69,322.20
Interest-Only with 5-Yr Balloon$1,166.67 / mo$200,000.00 (Full Principal)$70,000.00

Disclaimer

This calculation tool is provided for educational and informational estimation purposes only. Results are based on mathematical formulas and user-supplied parameters. They do not constitute formal underwriting, financial, tax, engineering, or legal determinations.

Frequently Asked Questions About Seller Financing & Hard Money Loan Calculator

What is seller financing and how does it work?
Seller financing (or owner financing) is a real estate transaction where the seller acts as the lender. Instead of the buyer getting a traditional bank mortgage, the buyer makes monthly payments directly to the seller based on an agreed-upon interest rate and schedule.
What is a hard money loan?
A hard money loan is a short-term, asset-backed loan secured by real estate, typically used by house flippers or real estate investors. Hard money loans are usually structured with interest-only payments and a short-term balloon payoff (typically 1 to 3 years) when the property is sold or refinanced.
What does it mean when a listing says 'owner will carry'?
This means the owner is willing to offer seller financing. They will carry the mortgage note, allowing the buyer to buy the house without a traditional bank mortgage.
How does a balloon payment work?
A balloon payment is a large lump-sum payment due at the end of a loan's term. Many owner financing deals use a 30-year amortization schedule (to keep monthly payments low) but have a 5-year balloon clause. This means the buyer makes low payments for 5 years, then must pay off the entire remaining loan balance in full (usually by selling the home or refinancing).
What is the difference between an amortized and an interest-only balloon loan?
In an amortized loan, each monthly payment covers both interest and a small amount of the principal, meaning your balloon balance drops slightly over time. In an interest-only loan, your monthly payments cover only the interest accrued, meaning the balloon balance at the end is exactly equal to the initial loan amount.
How do you calculate a finance charge on a loan?
The finance charge is the total cost of borrowing the money, which primarily consists of the total interest paid. To find this, multiply your monthly payment by the number of months paid up to the balloon payoff, add the balloon payment, and subtract the initial loan principal.

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