What Is Band of Investment?
The band-of-investment method builds an overall capitalization rate by weighting the required returns on each piece of a property's capital stack — typically the mortgage constant on the debt portion and the required equity yield on the equity portion — by their share of total financing.
Band of Investment in plain English
The band-of-investment method builds a cap rate from how a purchase is financed. Lenders need a payment on their share of the money, and equity investors need a cash return on theirs; weighting the two gives the overall rate the property must earn.
Appraisers use it to cross-check cap rates taken from sales, especially when there are few comparable sales or interest rates have moved.
Formula
Overall Rate = (Loan-to-Value % × Mortgage Constant) + (Equity % × Required Equity Yield)- Loan-to-Value %
- The share of the price financed with debt.
- Mortgage Constant
- Annual principal and interest per dollar borrowed, which depends on the rate and amortization.
- Equity %
- The share paid with equity (100% minus loan-to-value).
- Required Equity Yield
- The first-year cash return equity investors require, also called the equity dividend rate.
The equity component is a cash-on-cash rate; it does not capture appreciation or loan paydown.
Worked example
Building a cap rate from the cost of debt and equity
Illustrative example - round numbers, not current market data. Calculated with Reaixo's calculator engines.
Assumptions
- Loan-to-value
- 70%
- Loan terms
- 7.0% interest, 25-year amortization, monthly payments
- Equity dividend rate investors require
- 9.0%
| Step | Calculation | Result |
|---|---|---|
| 1. Mortgage constant (annual payment per $1 borrowed) | 12 × monthly payment on $1 at 7.0%, 25 years | 8.48% |
| 2. Debt component | 70% × 8.48% | 5.94% |
| 3. Equity component | 30% × 9.0% | 2.70% |
| 4. Overall cap rate | 5.94% + 2.70% | 8.64% |
Overall capitalization rate: 8.64%. A buyer who can borrow on these terms and needs a 9% cash return on equity can pay a price that capitalizes NOI at about 8.64%. If market sales show much lower cap rates, buyers are accepting lower current returns - usually expecting growth.
What this calculation leaves out
- The equity dividend rate is a first-year cash return, not a total return; it ignores appreciation and loan paydown.
- Use the loan terms actually available for this property type today; the result moves with interest rates.
Why it matters
It's a useful cross-check on a market-derived cap rate, since it grounds the rate in the actual cost of the debt and equity available for that specific deal.
When loan rates rise, the mortgage constant rises with them, and the band-of-investment rate climbs unless investors accept a lower equity return - one reason property values fall when rates jump.
When Band of Investment is used
- Appraisers supporting a cap rate when comparable sales are thin.
- Investors checking whether today's loan terms still support a market cap rate after rates rise.
- Explaining why cap rates tend to move with interest rates.
Common mistakes
- Using the interest rate instead of the mortgage constant for the debt portion.
- Using loan terms that are not actually available for the property type.
- Treating the equity dividend rate as a total return target.
Compare and common questions
Band of Investment: frequently asked questions
What is the band-of-investment method?
It is a way to build a cap rate by weighting the mortgage constant and the equity dividend rate by the shares of debt and equity in the purchase.
Why use a mortgage constant rather than the interest rate?
Because the lender is paid principal and interest. The mortgage constant captures both, so it reflects the actual cash the property must produce for the debt.
Is the band of investment a market cap rate?
No. It is a supported estimate based on financing; appraisers compare it with cap rates taken from actual sales.
More Commercial & Appraisal Terms
Recommended next step
Compare the band-of-investment rate with the cap rate a specific property actually offers.
Cap rate calculator →Apply it to a specific property: Cap Rate Analysis.
Sources and review
No regulator defines this term; the page follows common industry practice.
Where this applies: Not regulated. Investment and valuation ratios are industry and appraisal conventions; lenders, appraisers and analysts may define inputs differently, so check how a figure was calculated.
Last reviewed: · Updated:
Examples use illustrative figures; rules of thumb are labelled as such. Rates, limits and program rules change - confirm current figures with your lender or a qualified professional.
This definition is provided for general educational purposes and is not financial, legal, tax, or real estate advice. Verify important decisions with appropriately qualified professionals.
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