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Quick answer — seller carryback payment
$300,000 home, $30,000 down → $270,000 seller-financed at 7.5% for 30 years ≈ $1,888/mo P&I. Total interest ≈ $409,637; buyer all-in est. $714,637 with closing. At 9% same loan → ≈ $2,172/mo.
Free seller carryback and owner financing payment calculator—monthly P&I, total interest, and buyer all-in cost. More tools on our Finance & Housing hub.
Last updated October 9, 2026
Seller benefit dollar amounts include illustrative placeholders—not tax or appraisal advice.
Contract ends before full payoff?Land contract calculator
$1,888
Monthly payment
$409,637
Interest earned
$714,637
Total cost to buyer
Reasonable interest income; compare to market rates and default risk.
Interest collected over the full amortization term at the stated rate
$409,637
Some sellers command a modest premium when offering financing—not guaranteed
$15,000
Spreading gain may help tax planning—see a CPA; not calculated here
Creative terms can attract buyers who cannot qualify conventionally
Seller may weigh story and equity more than automated underwriting
Rate, term, down payment, and balloon are negotiable between parties
Closing costs entered separately from P&I for all-in buyer math
$5,000
No bank underwriting timeline—still requires legal docs and title work
Missed payments may require legal remedy depending on structure and state law
Mitigation: Strong down payment, credit review, insurance, recorded lien
Seller may earn less than alternative investments if rates rise
Mitigation: Market-rate pricing, shorter term, or balloon with refinance expectation
Residential seller financing may trigger federal and state rules
Mitigation: Attorney review of Dodd-Frank, SAFE Act, and local requirements
Buyer must pay or refinance a lump sum when due
Mitigation: Realistic balloon sizing and early payoff plan
Limits long-term seller exposure; pair with land contract calculator for schedule balloons
Medium Priority| Category | Item | Amount | Description |
|---|---|---|---|
| Property | Property Value | $300,000 | Agreed purchase price |
| Property | Down Payment | $30,000 | Cash at closing |
| Property | Loan Amount | $270,000 | Seller-financed principal |
| Loan | Seller Rate | 7.5% | Annual interest on note |
| Loan | Term (years) | 30 | Amortization horizon |
| Loan | Monthly Payment | $1,888 | Principal and interest |
| Totals | Total Interest | $409,637 | Over full term |
| Totals | Total Payments | $679,637 | P&I only |
| Totals | Balloon (entered) | 0 | Lump sum if specified |
| Totals | Total Cost to Buyer | $714,637 | Down + closing + P&I + balloon + prepay penalty |
| Costs | Closing Costs | $5,000 | Buyer closing estimate |
| Qualification | Credit tier (score proxy) | 700 | Illustrative FICO band |
Same formulas as the calculator—compare rate and amortization length on typical carryback sizes.
| Scenario | Financed | Rate | Term | Payment | Total interest |
|---|---|---|---|---|---|
| $300k home · 10% down · 7.5% · 30 yr | $270,000 | 7.5% | 30 yr | $1,888/mo | $409,637 |
| Same loan · 9% seller rate | $270,000 | 9% | 30 yr | $2,172/mo | $512,093 |
| Same loan · 5% seller rate | $270,000 | 5% | 30 yr | $1,449/mo | $251,791 |
| Same loan · 15-year amortization | $270,000 | 7.5% | 15 yr | $2,503/mo | $180,528 |
| $250k · 20% down · 7.5% · 10 yr | $200,000 | 7.5% | 10 yr | $2,374/mo | $84,884 |
Owner carryback notes usually use the same fixed-rate amortization math as bank mortgages: each month, interest is charged on the remaining balance and the remainder reduces principal. The seller's modeled interest income is the sum of interest portions over the term (before taxes, servicing, or default risk).
1. Monthly rate
M = P × [r(1+r)^n] / [(1+r)^n − 1]
r = annual seller rate ÷ 12 (e.g. 7.5% → 0.00625 per month).
2. Number of payments
M = P × [r(1+r)^n] / [(1+r)^n − 1]
n = loan term in years × 12 (30 years → 360 payments).
3. Payment factor
M = P × [r(1+r)^n] / [(1+r)^n − 1]
factor = [r(1+r)^n] / [(1+r)^n − 1]
4. Monthly P&I
M = P × [r(1+r)^n] / [(1+r)^n − 1]
M = loan amount × factor (standard fixed-rate amortization).
5. Total interest
M = P × [r(1+r)^n] / [(1+r)^n − 1]
Total interest ≈ (M × n) − loan amount; buyer all-in cost adds down payment, closing, optional balloon and prepayment penalty.
Monthly rate = 7.5% ÷ 12 = 0.6250% per month. Payments = 30 × 12 = 360 months.
Monthly P&I ≈ $1,888. Total paid over the term ≈ $679,637; interest portion ≈ $409,637.
Pair with the land contract calculator if the written contract matures before this amortization schedule ends.
Share it with buyers and sellers negotiating carryback terms.
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