Down Payment Requirements for Assumable Mortgages

There's no set down payment percentage for an assumable mortgage. Instead, you need to cover the equity gap: the difference between the home's sale price and the remaining loan balance.

This is fundamentally different from a traditional mortgage where you put 3.5%, 5%, or 20% down. With an assumption, the "down payment" is whatever the equity gap happens to be.

On some properties, the gap is $40,000. On others, it's $150,000. It depends entirely on the specific property: how long the seller has owned it, how much they originally borrowed, and how much the home has appreciated.

Typical Equity Gaps in Colorado Right Now

Based on the 1,124 properties I'm tracking, here's what I'm seeing:

Most properties have equity gaps between $60,000 and $130,000. Homes purchased more recently (2022) tend to have smaller gaps. Homes purchased earlier (2019-2020) with significant appreciation have larger gaps.

The average equity gap across Colorado's assumable inventory is roughly $90,000 to $100,000. But the range is wide. Some properties have gaps under $50,000. Others exceed $200,000.

Your Options for Covering the Gap

Cash. If you're selling an existing home, your proceeds can cover it. If you've been saving aggressively, maybe you have enough liquid.

Second mortgage. This is the most common path. A lender gives you a separate loan for the equity gap amount. Rates are higher (8-10%), but the blended rate with the assumed first mortgage is still well below market. See my full guide on second mortgages for assumptions.

Gift funds. FHA and VA loans allow gift funds from family members. If a relative can help with part of the gap, that reduces the second mortgage amount.

401k or retirement account loans. Some buyers borrow against their 401k to cover part of the gap. This has implications (taxes, penalties if you leave your job), so consult a financial advisor first.

Combination. Most buyers use a mix. Maybe $40,000 cash from savings, $20,000 gift from parents, and a $50,000 second mortgage.

Comparing "Down Payments"

Let's compare what you'd need for the same $400,000 home:

Traditional FHA loan: 3.5% down = $14,000. But your rate is 7%, and your monthly payment is $2,661.

Assumable mortgage: Equity gap might be $90,000. But your rate is 2.75%, and your monthly payment (even with a second mortgage on part of the gap) is around $2,000.

Yes, you need more money upfront with the assumption. But you save $661/month, which is $7,932/year. In about 11 years, the cumulative monthly savings exceed the extra upfront cost. After that, it's pure savings for the remaining life of the loan.

Think of the larger equity gap as prepaying your savings. You're investing more upfront in exchange for dramatically lower costs over 20+ years.

Properties With Small Equity Gaps

If your cash is limited, focus on properties where:

• The loan was originated recently (2022 or later), so less principal has been paid down
• The home hasn't appreciated dramatically (some markets have been flat)
• The original loan balance was high relative to the purchase price

I can filter the listings database to show properties matching your budget constraints. Some properties in the current inventory have equity gaps under $50,000, which with a second mortgage means very little cash out of pocket.

The Bottom Line on Down Payments

Don't think of assumable mortgages as having a "down payment requirement." Think of them as having an equity gap that needs to be covered, with multiple ways to cover it.

The gap is larger than a traditional 3.5% FHA down payment. But the savings over the life of the loan dwarf the extra upfront cost. If you can find a way to cover the gap (whether through savings, a second mortgage, or family help), the math almost always works in your favor.

Calculate your savings on a specific price point, or browse listings to see actual equity gaps on real Colorado properties.

Ready to Find an Assumable Mortgage in Colorado?

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Frequently Asked Questions

How much do I need for a down payment on an assumable mortgage?

You don't make a traditional down payment. Instead, you cover the equity gap, the difference between the home's price and the existing loan balance. This can range from $20,000 to $200,000+ depending on the property.

What if I can't afford the equity gap?

Options: (1) Find properties with smaller gaps (higher remaining balances relative to price), (2) Use a second mortgage to cover the gap, (3) Negotiate a lower purchase price with the seller. Not every assumable property has a large gap.

Can I use gift funds for the equity gap?

Depends on the loan type. FHA assumptions generally allow gift funds from family members. VA assumptions have their own rules. Check with the servicer before counting on gift funds.

Is the equity gap the same as a down payment?

Functionally yes. Both represent what you bring to the table at closing. The equity gap goes to the seller (their equity), not to a lender. It's not a "down payment" in the technical mortgage sense, but it serves the same economic function.

Can I finance 100% of an assumable mortgage?

Not typically. You need cash or a second mortgage to cover the equity gap. Some VA-to-VA assumptions allow the buyer to cover the gap with a VA loan itself, but this is complicated and rare.

Are there programs to help cover the equity gap?

Some state housing finance agencies are developing programs for assumable mortgage assistance. Check with your state's HFA. Sellers sometimes offer concessions to help cover part of the gap.