The Seller Said $0 Down, 0% Interest, 30 Years. Here’s the Exact Deal Structure.

Most real estate investors think seller financing means offering a slightly below-market rate and hoping the seller bites. I thought that too, once.

Then I did a deal. $0 down. 0% interest. $100,000 house. 30-year amortization at $278/month. The seller was relieved. Four years later, my tenants had paid down roughly $48,000 in principal, the property had climbed to about $180,000, and I was sitting on approximately $128,000 in equity I’d built without putting a single dollar into the down payment.

Here’s exactly how I built that structure, step by step.

Step 1: Look for a Capital Gains Problem, Not a “Motivated” Seller (Worth up to $38,000 to Them)

“Motivated seller” tells me almost nothing useful. What I’m actually hunting for is someone sitting on a capital gains problem they haven’t solved.

A seller who bought a house in 1989 for $40,000 and can sell it today for $200,000 is staring at a $160,000 capital gain. Cash them out in one transaction and they could owe the IRS $38,000 or more the year they close. That money is just gone.

When I carry the note instead, they spread that gain across years of installment payments. Tax deferred. I’m not asking for a favor — I’m solving a $38,000 problem they didn’t know real estate could fix.

Most agents will take the beautiful listing and move on. I’m willing to get into the muck with the ones who have complicated situations nobody else wants to touch. That’s where these deals live.

My first question on every call isn’t “will you take seller financing?” It’s “how long have you owned it?” If the answer is 15 or more years and the property’s free-and-clear, I’m paying close attention. Where do I find these sellers? Estate sales. Landlords who bought pre-2010. Free-and-clear rentals with owners who are tired of managing tenants and terrified of a tax bill.

Step 2: Propose the Note Structure Before You Negotiate Price (Lead With a Specific Number)

Most investors negotiate the price first and then fumble through terms. My approach runs backward from that.

I arrive with a specific note structure already written: $100,000 purchase price, $0 down, 0% interest, 30-year amortization, $278/month. That’s just $100,000 divided by 360 months. No mystery.

Does 0% interest seem impossible? It isn’t, once you run the seller’s actual numbers. If their real goal is capital gains deferral, the interest rate is almost irrelevant to them. I’ve had sellers tell me they’d genuinely rather receive $278 a month for 30 years than hand $38,000 to the IRS by April. Some of them MEAN it.

My strategy on that $100,000 deal was to place a tenant at $1,000/month. The rent serviced the note. My out-of-pocket for the acquisition: zero. My tenants built my equity position for four straight years while I owned the house.

Step 3: Run the Dodd-Frank Payment Floor Before You Draft Anything (One Formula, No Exceptions)

This is the step I watch investors skip, and it’s the one that turns clean deals into compliance problems.

Dodd-Frank prohibits negative amortization on owner-occupied consumer loans. If your buyer is going to live in the property, the monthly principal and interest payment must be at least equal to the interest accruing on the note that month.

The formula: note balance × annual interest rate ÷ 12.

On a $180,000 note at 7%, my floor is $1,050/month. Set the payment below that and I’ve created negative amortization. That’s a violation. I run this number on every deal, every time, before my attorney drafts a single sentence.

Standard 30-year amortization always clears the floor automatically. But if I’m writing a balloon note, an interest-only period, or any custom payment schedule, I need this number confirmed on paper first.

Math! I know, not the most fun part. But this is the calculation that kills a seller’s confidence in you when you miss it at closing.

The good news on 0% interest structures: there’s no interest accruing, so any positive payment clears the floor automatically. That’s one reason 0% notes can actually be cleaner to document than low-rate alternatives.

Step 4: Set the First Payment to the Right Month (The Detail That Haunts You at Refinance)

The first payment is due on the 1st of the month following a full calendar month after closing.

Close September 15? First payment is November 1, not October 1. That full-month gap keeps the interest proration clean and removes the short-month calculation that creates headaches later. I know it sounds like a small detail. It won’t feel small when a title company catches it during a refinance two years from now and wants to know why your payment history doesn’t line up.

Step 5: Put a Servicer on the Note From Day One ($25–$35/Month, Every Deal)

I’ve never collected seller-financed payments directly, and I won’t start. A third-party loan servicer handles payment collection, maintains a full payment history, issues 1098 statements to both parties, and gives everyone a defensible paper trail if anything goes sideways.

Cost: $25–$35/month, typically. On a deal where my tenant is paying $1,000/month to service the note, that’s less than 4% of gross income to protect the entire structure. My servicer has already saved me from two disputes I didn’t see coming.

Want to work through real deals like this one with operators who’ve actually done them? Come to the Black Sheep Convention, September 25–26, 2026, at the Hilton San Antonio Hill Country.

Twelve operators. Ten classes. Ten hours of Texas CE. Five class periods, two classes running simultaneously, so you pick your track. $399 all-access in person. $99 to attend live online. Real deals from operators in the trenches — the kind you can copy Monday morning.

Register at blacksheepconvention.com