I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. I’ve been in California mortgage lending since 2000 and founded DiVita Home Finance in 2007. I’m known as a creative mortgage broker: when a bank says no, I find the lender and the loan structure that can say yes. Call (800) 239-1103.
A 40-year mortgage spreads repayment over 480 months instead of 360, and the most common version in California adds a 10-year interest-only (IO) period up front. The result is the lowest payment available on a fixed-rate loan — and, just as important, an easier qualifying payment than a 30-year interest-only loan. These are non-QM products, so they aren’t for everyone, but for the right high-cost-market buyer, self-employed borrower, or investor they’re a real tool. Here’s how they work, what they actually cost, and who qualifies.
The Three Structures
- 40-year fixed, fully amortizing: the same rate for 40 years; every payment includes principal from day one.
- 40-year fixed with 10-year interest-only: interest-only payments for years 1–10, then the loan amortizes over the remaining 30 years. This is the most popular 40-year structure.
- 30-year fixed with 10-year interest-only (for comparison): interest-only for 10 years, then the balance must be repaid over just 20 years.
Because a qualified mortgage (QM) under federal rules can’t have a term over 30 years or interest-only payments, all 40-year and IO loans are non-QM products offered by portfolio and non-QM lenders, not Fannie Mae, Freddie Mac, or FHA. (HUD does allow 40-year terms for FHA loan modifications for struggling borrowers, but not for new FHA purchases or refinances.)
Payment Comparison
On a $1,200,000 loan (for example, a $1.5M home with 20% down), with an illustrative 7.00% rate for the 30-year fixed and 7.25% for the non-QM options:
| Structure | Rate (example) | Payment, years 1–10 | Payment after year 10 |
|---|---|---|---|
| 30-year fixed | 7.00% | ~$7,984 | ~$7,984 (through year 30) |
| 40-year fixed, fully amortizing | 7.25% | ~$7,676 | ~$7,676 (through year 40) |
| 40-year fixed, 10-year IO | 7.25% | ~$7,250 (interest only) | ~$8,186 (years 11–40) |
| 30-year fixed, 10-year IO | 7.25% | ~$7,250 (interest only) | ~$9,485 (years 11–30) |
Principal and interest only. Rates are examples, not quotes; actual pricing depends on credit, loan-to-value, documentation type, property, and loan size.
Why the 40-Year IO Is Easier to Qualify For
This is the part most buyers — and many agents — miss. Under the federal ability-to-repay rule, a lender making an interest-only loan to a homeowner has to qualify you on the fully amortizing payment after the IO period ends, not the lower interest-only payment you’ll actually make at first.
- On a 30-year IO, the balance has to be repaid over the remaining 20 years, so the qualifying payment on $1.2M at 7.25% is about $9,485.
- On a 40-year IO, the balance is repaid over the remaining 30 years, so the qualifying payment is about $8,186 — roughly the same as a standard 30-year fixed.
That’s about $1,300 a month less qualifying pressure on a $1.2M loan, and roughly $2,160 a month on a $2M loan. For a borrower near the DTI limit, that can be the difference between approval and denial. (Business-purpose investment loans, such as DSCR loans, follow different rules — some lenders qualify the property on the interest-only payment.)
The Trade-Off: Total Interest
Lower payments cost more over time. On a $560,000 loan at 7.5%, a 30-year fixed runs about $3,916 a month and roughly $850,000 in total interest; a 40-year fixed lowers the payment to about $3,685 (about $231 less) but pushes total interest to roughly $1.21 million. During an IO period you pay down no principal at all, and after year 10 the payment rises. Most borrowers who choose a 40-year or IO loan plan to sell, refinance, or pay extra principal long before the final payment — you can usually pay principal voluntarily at any time.
Who Uses 40-Year and Interest-Only Loans?
- High-net-worth buyers who would rather keep capital invested than pay down a mortgage.
- Self-employed borrowers using bank statement, P&L, or 1099 income, where a lower qualifying payment keeps DTI in range.
- Retirees and asset-rich borrowers qualifying through asset depletion.
- Real estate investors pairing a 40-year IO with a DSCR loan to improve cash flow and the property’s coverage ratio.
- Move-up buyers temporarily carrying two properties.
- Buyers in high-cost markets — Marin, San Francisco, the Peninsula, coastal Los Angeles and Orange County — where jumbo loan amounts make every dollar of qualifying payment matter.
Typical Requirements
Non-QM guidelines vary by lender, but expect:
- Stronger credit than conventional — many IO programs look for scores in the high 600s to 700s.
- More equity — often 20% or more down, with less leverage allowed on investment properties.
- Meaningful cash reserves, often several months to a year or more of payments.
- Income documented by full doc, bank statements, P&L, 1099, asset depletion, or DSCR, depending on the program.
- Possible prepayment penalties on investment-property loans — confirm before you lock.
Rates on 40-year and IO loans are generally higher than a conforming 30-year fixed, because they’re non-QM. With access to 40+ wholesale lenders, I can price the same scenario across several non-QM investors, including 40-year IO options paired with bank statement income.
Is It Risky?
It depends on how it’s used. For a buyer with strong assets who understands the structure and has a plan for year 11, a 40-year IO can be a smart cash-flow tool. For a buyer stretching to afford the interest-only payment with no plan for the reset, it’s a risk. I always show the post-IO payment, the total interest, and the comparison to a standard 30-year before recommending one.
Frequently Asked Questions
Can I get a 40-year mortgage in California?
Yes, through non-QM and portfolio lenders. Because qualified mortgages can’t exceed 30 years or have interest-only payments, 40-year loans aren’t available through Fannie Mae, Freddie Mac, or new FHA loans. FHA allows 40-year terms only for loan modifications.
Why is a 40-year interest-only loan easier to qualify for than a 30-year interest-only loan?
For a home you’ll live in, the lender must qualify you on the fully amortizing payment after the interest-only period ends. A 30-year loan with 10 years of interest-only must be repaid over the remaining 20 years; a 40-year loan has 30 years left. On $1.2 million at 7.25%, that’s a qualifying payment of about $8,186 instead of about $9,485.
Do I qualify on the interest-only payment?
Not on an owner-occupied loan — federal ability-to-repay rules require the payment after the interest-only period. Some business-purpose investment loans, such as DSCR loans, may qualify the property on the interest-only payment, depending on the lender.
Is a 40-year interest-only loan risky?
It can be if you’re stretching. You pay no principal during the interest-only years, the payment rises after year 10, and you pay more total interest than on a 30-year loan. It works best for borrowers with strong assets and a clear plan to sell, refinance, or pay extra principal.
Can I combine a 40-year interest-only loan with bank statement income?
Yes. Several non-QM lenders offer 40-year interest-only terms with bank statement, P&L, 1099, asset depletion, or DSCR documentation, which is especially useful for self-employed borrowers buying higher-priced homes.
Can I pay a 40-year mortgage off early?
Usually yes. Owner-occupied non-QM loans generally allow extra principal payments, while some investment-property loans carry prepayment penalties for the first few years. Confirm the terms before you lock.
Related Resources
- Non-QM Mortgages in California
- Jumbo Loans in California
- Bank Statement Loans
- DSCR Loans for Investors
- 15- vs. 30-Year Mortgage
- ARM vs. Fixed-Rate Mortgage
- High-DTI Mortgages
Official Sources & References
Talk to Michael Directly
DiVita Home Finance | Tiburon, CA | In lending since 2000, founded DiVita Home Finance in 2007. Michael DiVita DRE #01372066 | NMLS #241655. Company DRE #01818285 | NMLS #323700.
💬 Text: (310) 849-9124
