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Mini Perm Loan Calculator
Mini-perm loans bridge construction and long-term permanent financing. Short maturity (3-7 years), often with 1-2 years IO followed by amortization, and a balloon at maturity. This calculator computes the IO payment, the amortizing payment, and the balloon you'll need to refinance.
Amortizing monthly payment
$73,899
IO monthly payment
$62,500
Balloon at maturity
$9,541,398
Principal paid down over term
$458,602
First-year total payment
$750,000
How the math works
Mini-perm loans are 3-7 year CRE loans that bridge a construction loan and permanent financing. Often IO for 1-2 years followed by amortizing payment. At maturity, borrower refinances to long-term perm or extends. Popular when construction is stabilizing but not yet ready for agency or CMBS.
Balloon at maturity is what refinances. On lease-up deals, the balloon is sized assuming stabilized NOI drives the refinance — if lease-up stalls, the balloon can exceed refinanceable amount.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Mini Perm Loan Calculator is built to give a quick, browser-based estimate for mini perm loan. Mini-perm loans bridge construction and long-term permanent financing. Short maturity (3-7 years), often with 1-2 years IO followed by amortization, and a balloon at maturity. This calculator computes the IO payment, the amortizing payment, and the balloon you'll need to refinance. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the mini perm loan result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this mini perm loan estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter loan amount and rate.
- Enter IO period in months and amortization years.
- Enter maturity in years.
- Read monthly payment and balloon at maturity.
Frequently Asked Questions
When to use mini-perm?
Stabilizing asset not yet ready for 10-year CMBS. Sponsor wants short-term hold before sale. Bridge-to-agency transitions. Credit-tenant shopping centers waiting for anchor to open.
Rate premium?
Mini-perm is usually 50-150 bps above agency/CMBS — shorter term, fewer exit options for lender. Balloon risk means lender prices for early refinance or default.
Balloon refinance risk?
Big. If rates rise or NOI under-performs, the refinance loan sizes smaller than the balloon — borrower must write a check or default. Mini-perm only makes sense with a clear stabilization path and conservative pro forma.
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