Blended-Rate Second Mortgage Test
Compare total borrowing cost before replacing a low-rate first mortgage
- Difficulty
- Easy
- Time to result
- ~days to results
- Steps
- 5
- Confidence
- 98%
This test compares two complete financing structures rather than reacting to the private second mortgage's higher headline rate. First, capture the outstanding balance and rate of the existing low-rate first mortgage. Then price the extra capital as a second mortgage and calculate the weighted, or blended, rate across both balances. Compare that result with the cost of paying off the existing loan and replacing the whole balance with a new first mortgage at current rates. Boulter's example combines a $1 million first at 2.5% with a $200,000 second at 12%, producing an estimated blended rate around 3.5% to 4%. Because these private loans are short term and may have no prepayment penalty after six months, the borrower can revisit refinancing when rates improve.
Origin
Extracted from Coffeez for Closers, where Chris L. Boulter explained Val-Chris Investments' marketing case for private second mortgages.
Core principles
- 01Preserve valuable low-rate debt when replacing it raises total cost
- 02Evaluate the weighted cost of all borrowing rather than one headline rate
- 03Use short-term second-position capital as a bridge when the blended rate wins
- 04Reassess the structure when market rates improve
How to run it
- 1
Value the existing first
Record the first mortgage's balance and interest rate. A below-market first mortgage is the financing asset the borrower may want to preserve.
Watch out Do not compare only the new loan rates while ignoring the balance being refinanced.
- 2
Price both structures
Obtain terms for replacing the first mortgage and for retaining it while adding a private second. Include the amount of additional capital needed in both cases.
- 3
Calculate the blended rate
Weight each retained loan's rate by its balance to evaluate the combined borrowing cost. This reveals whether the low-rate first offsets the higher-rate second.
Pro tip Present the blended figure alongside the second mortgage's headline rate.
- 4
Compare the alternatives
Compare the blended retained-first structure with the new first mortgage available in the current market. Choose the second-mortgage route only when its overall economics are materially better and underwriting permits it.
Watch out A lower blended rate does not override the lender's equity requirement.
- 5
Plan the exit
Review the second mortgage's prepayment terms and treat it as short-term financing. Refinance or repay it when improved market rates make a better product available.
Pro tip Set a review point after any prepayment-penalty period ends.
Watch out Do not assume rates will fall on a precise schedule.
In the wild
Boulter gives an example of a borrower retaining a $1 million first mortgage at 2.5% and adding a $200,000 second at 12%. He estimates the resulting blended rate at roughly 3.5% to 4%, below the rates discussed for a new first mortgage.
→ The borrower accesses additional capital while retaining the larger low-rate loan.
Common mistakes
Rejecting the second on headline rate
Looking only at the second mortgage's 12% rate misses the effect of retaining a much larger first mortgage at a very low rate.
Replacing cheap debt without comparison
Paying off a low-rate first mortgage can raise the cost of the entire balance, not merely the new capital.
Ignoring the exit terms
The bridge logic depends partly on whether the second can be repaid or refinanced without a long penalty period.
Is it for you?
Best for
It is best for borrowers with a large low-rate first mortgage who need a smaller amount of short-term additional capital.
Not ideal for
It is not ideal when the combined loan-to-value fails underwriting or when the blended structure costs more than replacing the first mortgage.
From the transcript
“while our rate is higher let's look at the Blended rate”
“if you go a million at 2 and A2 and 200 at 12 your Blended rate is probably 3 and a half maybe 4%”
“most of our loans either have no prepayment penalty or there's no prepayment penalty after 6 months”
From the episode
What is Private Money Lending? ft. Chris L. Boulter
Chris L. Boulter