How to Underwrite Refinance Risk in Non-Core Markets
Refinance risk is the gap between what your loan will demand at maturity and what the property will support. How to size that gap before you close, not after.
Most commercial underwriting models treat the refinance as an assumption: at maturity, the loan is replaced at some rate, at some proceeds level, and the model continues. That single line is where a large share of the 2023–2025 losses actually lived.
Refinance risk is the gap between what your existing loan will demand at maturity and what the property will support at that moment, on the terms then available. In a non-core market it is larger and harder to close than the model implies, because there are fewer lenders and fewer comparable sales to argue value from.
The three constraints that decide refinance proceeds
A lender will size a new loan to the most binding of three tests. In a low-rate environment, LTV usually binds. Since 2022, it has almost always been one of the other two — which is why sponsors who only modelled LTV were surprised.
Loan to value. Proceeds capped at a percentage of appraised value. In a thin market the appraisal is the problem: with few comparable trades, appraisers lean on capitalised income and on whatever sales exist, which may be stale or distressed.
Debt service coverage. Proceeds capped so that NOI divided by the new debt service clears a minimum, typically 1.20x–1.30x depending on asset and lender. Because the new coupon is in the denominator, a higher rate mechanically shrinks proceeds even if NOI is unchanged.
Debt yield. NOI divided by loan amount, with a floor — commonly 8–10%, and higher in markets lenders consider thin. Debt yield ignores both the rate and the appraisal, which is exactly why lenders adopted it. It is the hardest constraint to argue with, and in secondary markets it frequently binds first. See what debt yield floor works in tertiary markets.
Building the test
Do this at acquisition, not at maturity.
Step 1: State the maturity balance
Your loan balance on the maturity date, after any scheduled amortisation. If the loan is interest-only, this is the full original principal — which is the point people miss about interest-only debt in a rising-rate environment.
Step 2: Project NOI at maturity, conservatively
Use the NOI your business plan produces, then reduce it. In non-core markets three things routinely underperform the model:
- Lease-up takes longer because the tenant pool is smaller.
- Expense growth outruns rent growth, particularly insurance and payroll.
- Concessions persist longer than underwritten when new supply delivers.
If your plan produces $1.0m of NOI at maturity, test the refinance at $0.85m as well. That is not pessimism; it is the observed dispersion.
Step 3: Size the new loan under all three constraints
For a range of exit rates — not one — compute proceeds under each test and take the lowest:
- Debt yield test: proceeds = NOI ÷ debt yield floor.
- DSCR test: proceeds = the largest loan whose payment at the new rate and amortisation clears the DSCR minimum.
- LTV test: proceeds = value × LTV, where value = NOI ÷ exit cap.
Do this at several rate and cap-rate combinations. The DSCR calculator and refinance break-even calculator handle the mechanics.
Step 4: Compare to the maturity balance
The difference is your refinance gap. If proceeds fall short, someone must fund the difference at maturity — you, your investors, or a new equity partner on terms set by your urgency.
Step 5: Ask what closes the gap
There are only five answers, and it is worth writing down which one you are relying on:
- Fresh equity — sized, and from whom.
- A sale — into a market you have already established may be thin.
- An extension — if you can meet its conditions.
- Additional amortisation between now and maturity — which reduces cash flow today.
- NOI growth beyond your base case — which is hope, not a plan.
Why non-core markets are structurally harder
Fewer lenders. In a primary market a refinance is a competitive process. In a tertiary metro you may have three realistic lenders, and if one exits the asset class your options narrow to two. Concentration among local banks in particular has proven fragile.
Appraisal risk is higher. Thin comparable sales mean a wider range of defensible values and more weight on the income approach — so a soft NOI year hits your value twice, once through income and once through the cap rate applied to it.
Debt yield floors are higher. Lenders price perceived exit risk into the floor, so the market that most needs generous proceeds gets the least generous test.
Insurance can move the whole picture. A premium that doubles reduces NOI, which reduces proceeds under all three tests simultaneously.
The mitigations that actually work
- Amortise. Interest-only maximises current cash flow and maximises maturity balance. In a market where refinance proceeds are uncertain, paying down principal is buying optionality.
- Match term to plan, with real margin. If lease-up is 24 months, a 36-month loan is tight and a 60-month loan is comfortable.
- Reserve for the gap at closing, not from future cash flow.
- Start the refinance twelve months out. In a thin lender market, the process takes longer and you want time to fail with one lender and start with another.
- Keep the rent roll refinanceable. Lease expirations clustered near maturity, or a single tenant above a concentration threshold, will cost you proceeds precisely when you need them.
- Build a lender relationship before you need one. See local bank debt vs agency debt in emerging markets.
A note on what this test is for
The purpose is not to produce a number that makes the deal work. It is to identify, before you commit, the condition under which the deal does not work — and then to decide whether you can fund that condition.
A sponsor who has modelled the gap and reserved for it has a plan. A sponsor whose model assumes a refinance at today's terms in five years has a forecast, and the last cycle was an expensive reminder that those are different things.
What to do next
- Test the structure itself with floating vs fixed rate structures for thin-liquidity CRE.
- Pressure the exit assumption with the cap rate, debt yield and exit cap stress test.
- Decide between paths with the refinance vs sale decision tree in secondary cities.
- Score preparedness using the refinance readiness framework for non-core assets.
Sources
Related Resources
1031 Exchange vs Capital Recycling for Portfolio Reallocation
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Best Rebalancing Models for Multi-Market CRE Portfolios
Real estate cannot be rebalanced like a stock portfolio — you cannot sell 8% of a building. Three models that work within that constraint, and when each applies.
Exit and Rebalancing Strategy for Emerging Market Portfolios
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