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Mbanc NMLS #38232 | Equal Housing Opportunity Lender
What Is an Interest-Only Bank Statement Loan?
An interest-only mortgage allows borrowers to pay only the interest portion of the loan for an initial period — typically 5 to 10 years — before payments convert to fully amortizing principal-plus-interest payments for the remainder of the loan term.
Combined with bank statement income documentation, interest-only loans give self-employed borrowers the flexibility of a lower initial monthly payment while qualifying on actual cash flow rather than tax return income.
Interest-Only Requirements on Mbanc’s Bank Statement Programs
Prime Ascent program (standard):
– Minimum credit score: 660
– Maximum LTV: 90% on eligible programs (Mbanc’s overall max is 85%, so 85% applies as the practical ceiling)
– Loan terms: 30-year and 40-year total
– Qualification: Based on the amortized payment after the interest-only period expires — not on the interest-only payment itself
Prime Ascent Plus program (more conservative):
– Minimum credit score: 700
– Maximum LTV: 80%
– Qualification: Same as above — amortized payment after IO period
How Interest-Only Qualification Works
The critical detail: you qualify based on the fully amortized payment that will apply after the interest-only period ends — not on the lower interest-only payment.
Example:
– Loan: $1,500,000 at 8.5%, 30-year term with 5-year interest-only period
– Interest-only payment: $10,625/month
– Amortized payment after year 5 (25-year remaining term): $12,008/month
You must qualify at $12,008/month — the payment that will apply for the majority of the loan term — not the lower $10,625/month IO payment.
This means the interest-only feature reduces your initial payments but doesn’t give you extra qualifying headroom. The DTI is calculated on the higher future payment.
The 40-Year Interest-Only Option
The 40-year loan term with interest-only feature is available on the Prime Ascent program. This extends the total loan term to 40 years, which reduces the amortized qualifying payment compared to a 30-year structure.
40-year IO example:
– Loan: $1,500,000 at 8.5%, 40-year term, 10-year interest-only period
– Qualification payment (amortized over remaining 30 years after IO): $11,386/month — lower than the 30-year post-IO qualifying payment
The 40-year option specifically for interest-only loans can improve DTI calculation when large loan amounts are involved.
Note: ARM products with 40-year terms must be combined with the interest-only feature.
When Does Interest-Only Make Sense for a Bank Statement Borrower?
Interest-only bank statement loans are particularly useful for:
Cash-flow management during business growth phase: A self-employed borrower who expects income to increase significantly in the next 3–5 years benefits from lower initial payments while qualifying on current income.
Investment property management: Lower initial payments on investment properties improve near-term cash flow even if the qualifying DTI is based on the future amortized payment.
High-value purchases with strong equity: At 80% LTV or below on a large loan, interest-only provides payment flexibility without significant risk from the deferred principal.
Frequently Asked Questions
What credit score do I need for an interest-only bank statement loan?
660 minimum on the Prime Ascent program. 700 minimum on Prime Ascent Plus.
Does interest-only change how income is calculated?
No. Bank statement income calculation is the same regardless of whether the loan has an interest-only feature. The difference is in which payment figure is used for DTI — always the fully amortized post-IO payment.
How long is the interest-only period?
Interest-only periods are part of the loan terms available on Mbanc’s programs — typically 5 or 10 years. Confirm available IO periods with your loan officer.
Can I do a 40-year interest-only bank statement loan?
Yes. The 40-year total term with interest-only is available on the Prime Ascent program. ARM products at 40 years must be combined with the IO feature. Minimum 660 credit score.
Is interest-only available for investment property bank statement loans?
Yes, on eligible programs with minimum credit score requirements. Investment property interest-only at Mbanc requires minimum 680 credit score.
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About the Author
Mayer Dallal is the Managing Director of Mbanc (Mortgage Bank of California, NMLS #38232), a consumer-direct Non-QM lender specializing in bank statement loans, DSCR loans, and asset utilization programs for self-employed borrowers and real estate investors. Mbanc is licensed in 24 states for primary residence lending and 46 states for investment property financing.
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Mbanc NMLS #38232 | Equal Housing Opportunity Lender
| Mortgage Bank of California
