A CRE refinance is worth running when the rate, NOI , prepay penalty , and sponsor capital needs combine to net a positive cash-on-cash improvement after closing costs and break fees. The decision math is a four-line spreadsheet: new debt service vs. old, less prepay cost amortized over hold, less new closing costs, less recapture of any cash-out.
When to refinance, the four trigger categories
Rate trigger: current market rates are materially below the loan's coupon, and the prepay penalty plus closing costs will be earned back within the remaining hold horizon.
NOI trigger: NOI has grown since origination such that proceeds at the same leverage cover existing debt plus a meaningful equity recapture.
Prepay trigger: the loan is approaching the open prepay window (last 90 days on most fixed-rate perm; defined dates on CMBS lockout). Refis that land in the open window save the prepay penalty entirely.
Sponsor capital trigger: the sponsor needs liquidity (partner buyout, recapitalization, alternative investment opportunity) and refinancing is a more efficient capital source than a sale or a new equity raise.
The prepay break-even calculation
Step 1, calculate the prepayment cost. Step-down (5-4-3-2-1 or similar): a fixed percentage of outstanding balance based on years remaining. Yield maintenance: present value of the gap between the loan's remaining payments at the loan rate vs. an equivalent Treasury yield. Defeasance: cost to purchase a Treasury portfolio that replicates the loan's scheduled cash flows.
Step 2, calculate the annual debt-service savings. New annual debt service at the proposed new rate, sizing, and amortization minus old annual debt service.
Step 3, calculate closing costs on the new loan: origination fee, lender legal, third-party reports, title, insurance, recording.
Step 4, break-even = (prepay cost + new closing costs) / annual debt-service savings. Result is the number of years the new loan must be held to recover the prepay cost. Compare to the planned hold horizon.
Worked example: $20M loan at 6.50% with 4 years remaining, refi to 5.50%. Annual savings ~$200K. Yield maintenance cost at current Treasuries ~$650K. Closing costs ~$200K. Break-even = ($650K + $200K) / $200K = 4.25 years. If planned hold is 5+ years, refi makes sense; if planned hold is 3 years, hold the existing loan.
Defeasance break-even at different Treasury levels
Defeasance cost is most sensitive to the gap between current Treasury yields and the loan rate. When current Treasuries are below the loan rate, defeasance is expensive (the replacement portfolio costs more than the loan balance because Treasuries pay a lower yield). When current Treasuries are at or above the loan rate, defeasance is cheap or even negative (the replacement portfolio costs less than the loan balance).
Practical consequence: in declining-rate environments (when the borrower most wants to refi to a lower rate), defeasance is most expensive and the break-even longest. In rising-rate environments, defeasance is cheap but the rate the borrower would refi into is also higher, eliminating the savings.
The optimal defeasance refi window is when current Treasuries have risen materially since origination but current loan spreads have tightened, so the new loan rate (Treasury + tighter spread) is below the existing loan rate while the defeasance cost is moderate. This window is rare and typically narrow.
Yield maintenance: how it works
Yield maintenance is the present value of the lender's lost interest if the loan is paid early. The standard formula: for each remaining payment, calculate the gap between the loan's payment at the loan rate and what the lender could earn investing the same principal in a Treasury of matching maturity. Discount each gap back to present value at the same Treasury rate. Sum.
When current Treasuries are well below the loan rate, the gap is large and the YM cost is large. When current Treasuries are at the loan rate, the gap is zero and YM is at the floor (typically 1% of outstanding balance).
Many YM formulas have a floor minimum (1% to 3% of outstanding balance). In high-Treasury environments where the formula calculation is below the floor, the floor governs.
Supplemental loans vs. full refinance: multifamily agency math
Supplemental loan: a second-lien loan from the same agency lender, typically available 12 months after the original closing on Fannie DUS and Freddie Optigo. Sized to bring total leverage up to current eligibility (typically 75% to 80% LTV on the combined first plus supplemental). Pays a slightly wider spread than the first.
Full refinance: pay off the existing first plus any prepay penalty, replace with new first lien at current pricing.
When supplemental wins: the existing first has tight prepay (yield maintenance with current Treasuries below the loan rate, or material lockout remaining), the rate on the existing first is competitive with current market, and the cash-out objective can be met with the second-lien proceeds alone. Total cost (new supplemental coupon plus existing first coupon) is often less than the full-refi cost (new combined coupon plus YM payoff).
When full refi wins: the existing first is meaningfully above current market rates, the existing first is approaching the open prepay window, or the cash-out objective requires more proceeds than a supplemental will allow.
Partner buyout refis: the worked example
Setup: 50/50 partnership owns a $30M property with a $15M existing loan at 7.0% with 4 years remaining and yield-maintenance prepay. Partner A wants to buy out Partner B at agreed valuation of $30M. Partner B's equity is $7.5M ($15M total equity / 2).
Option 1, full refi: new loan at 75% LTV = $22.5M. Pay off existing $15M plus YM (~$650K), pay Partner B $7.5M, leaving Partner A with the property and a new $22.5M loan. Net cash needed by Partner A at closing: ($15M + $0.65M + $7.5M) - $22.5M = $0.65M. Effectively Partner A funded $0.65M out of pocket plus took on $22.5M of new debt to acquire Partner B's $7.5M of equity.
Option 2, supplemental on existing first (if available): keep $15M first at 7.0%. Add $7.5M supplemental at 7.5% (illustrative). Total debt $22.5M. Pay Partner B $7.5M from supplemental proceeds. No YM, no full-refi closing cost. Net cash needed by Partner A: $0. Annual debt service higher than option 1 if current market rates are below 7.0%, but no prepay penalty.
Comparison driven by the prepay cost vs. the rate gap. Both structures get Partner A to the same outcome (sole ownership, $22.5M debt); the math determines which one costs less over the hold.
Rate-and-term vs. cash-out refi
Rate-and-term refi: replace existing debt with new debt of approximately the same balance and a new rate/term/amortization. Lower lender scrutiny than cash-out; faster closing.
Cash-out refi: the new loan exceeds the existing loan balance plus prepay and closing costs; the surplus goes to the borrower as recovered equity. Lender scrutiny of the cash-out is higher: documented use of proceeds, sometimes a holding-period requirement (for agency, typically 12-month seasoning), sometimes additional reserve requirements.
The headline math compares total proceeds to total all-in cost (new debt service plus the impact on operating cash flow of any reserves or covenants). Cash-out refis have a hidden cost: the recovered cash typically has a long redeployment lag; the leverage is incurred immediately.
Blend-and-extend in non-distress contexts
Blend-and-extend: the lender resets the loan rate to a blended rate between the existing rate and current market and extends the loan term, typically without triggering prepayment penalty. Common on bank perm and some life-co perm; uncommon on agency, CMBS, and HUD.
When it works: the borrower wants rate certainty without paying a prepay penalty, the lender wants to retain the relationship and extend duration on the loan. The blended rate is typically 25 to 75 bps inside what a full refi would cost the borrower (because the lender saves the cost of a full re-underwriting and the borrower saves the prepay).
When it doesn't work: agency lenders are constrained by program rules; CMBS loans are in trusts and cannot be modified outside special servicing.
Mid-loan modifications, rate reset, extension, amendment fee norms
Modifications are typically initiated by the borrower in non-distress contexts to extend a maturity, add IO, release a partial parcel, or substitute collateral. The lender charges an amendment fee (typically 0.10% to 0.25% of outstanding balance) and may re-underwrite the loan to current standards.
Modifications on agency loans require agency consent and are constrained by program rules. CMBS modifications outside the open window typically require special servicing involvement and are rarely available in routine non-distress contexts.
IO-period extension as a refi alternative
On loans with partial IO (e.g., 5 years IO followed by amortization), some lenders will negotiate an extension of the IO period in exchange for a small rate adjustment or amendment fee. This preserves cash-on-cash returns without triggering the full cost of a refinance.
Best candidates: agency multifamily loans with strong sponsor relationships, life-co loans where the property has performed in line with underwriting, bank perm loans where the deposit relationship is strong.
Compare the cash-flow benefit of interest-only payments with any rate adjustment or fee and the higher principal balance remaining at repayment. The answer depends on the loan and ownership plan.
Refi-vs-hold decision tree across rate scenarios
A lower available rate can justify reviewing a refinance, but it does not establish the result. Include prepayment, closing costs, amortization, proceeds, reserves and the planned holding period.
Scenario 2, current market rate is 50 to 100 bps below the loan rate, prepay penalty is moderate, planned hold is 3 to 5 years. Refi is a model exercise; the break-even is typically 2 to 4 years and the decision depends on hold-horizon certainty.
Scenario 3, current market rate is at or above the loan rate. Refi rarely makes sense unless there is a structural driver (cash-out, partner buyout, maturity extension) that cannot be achieved without a refi.
Scenario 4, loan is in or near the open prepay window. Refi math is much simpler because the prepay cost is small or zero. Even modest rate improvements (25 to 50 bps) often justify refi during the open window.
Scenario 5, loan has a prepay-penalty floor (1% to 3% of outstanding balance). In high-Treasury environments where the formula calculation is below the floor, the floor governs and refi math improves materially relative to a pure formula calculation.
Cash-out structure tradeoffs, equity recapture vs. coverage
A cash-out refi recovers equity that has accrued through NOI growth, debt amortization, and value appreciation. The recovered equity can be redeployed into other investments, used to fund partner distributions, or held as liquidity. The cost is incremental debt service on the cashed-out portion.
Reserve tradeoff: cash-out refis often trigger additional reserve requirements (tax/insurance/replacement) that did not exist on the prior loan. The cashed-out cash should be netted against the new reserve funding to compute the effective cash-out delivered to the borrower.
Tax tradeoff: cash-out refi proceeds are non-taxable to the borrower as long as the proceeds remain debt (not deemed equity). Sponsors with sophisticated tax structures often prefer cash-out refi over property sale because the sale would trigger capital gains while the refi defers them.
Limits: institutional lenders typically cap cash-out at 65% to 70% LTV on stabilized perm; agency programs allow up to 75% to 80% LTV on cash-out for seasoned multifamily (typically 12 months post-acquisition).
Maturity-wall planning, backing into the refi calendar
The maturity wall is the rolling stack of CRE loans coming due over the next 24 to 36 months. The MBA Mortgage Maturities Schedule and Mortgage Banker Q-Survey publish aggregate maturity-wall data; sponsors with sophisticated portfolio analytics maintain property-by-property maturity calendars.
Refi calendar back-solve: from the loan maturity date, subtract 90 to 120 days for the bake-off, third-party reports, and closing. From that date, subtract additional time for any pre-bake-off work (financial statement prep, sponsor entity work, tax-and-insurance binder lead time). The result is the trigger date for starting the refi process.
Open prepay window planning: most fixed-rate perm loans have a 90-day open prepay window at the back end of the term. Refis that close during the open window save the prepay penalty entirely. Sponsors should target closing within the open window unless there is a specific reason to refi early (rate improvement large enough to overcome prepay).
Multi-loan stacking: portfolio sponsors with multiple loans maturing in the same quarter face capacity constraints, placement firm capacity, lender appetite, third-party report capacity. Stagger refi closings across the quarter to avoid execution friction.
Refinancing into fixed from a floating bridge: when and why
Bridge loans are typically floating-rate (SOFR plus a spread) with rate caps. Conversion to fixed-rate perm typically happens at stabilization, when the property's NOI supports the perm coverage tests and the business plan execution is documented.
Timing decision: convert when the property is genuinely stabilized (12+ months of trailing operating data showing the underwritten performance) rather than at the earliest possible moment. Premature conversion exposes the sponsor to perm covenants the property may not yet support; delayed conversion preserves bridge optionality but accumulates higher floating-rate carrying cost.
Rate-environment decision: in rising-rate environments, earlier conversion to fixed locks in a lower rate before further rate increases. In falling-rate environments, delayed conversion allows the perm to be locked at a lower rate.
Rate-cap residual value: floating bridge loans require rate caps that are typically purchased upfront for the loan term. At conversion to fixed-rate perm, the cap can sometimes be sold to recover residual value (typically 10% to 30% of the original cap cost depending on market rates and remaining term).
Conversion mechanics: convert through a refi (full payoff of bridge plus origination of new perm) or through a take-out-from-the-same-lender perm program (some bridge lenders offer streamlined perm conversion with reduced documentation and waived exit fee). The take-out-from-same-lender path is typically faster and cheaper but produces less competitive perm pricing because the bake-off is foregone.
Fee-and-cost line items in a refinance: practical breakdown
Origination fee: typically 0.50% to 1.00% of loan amount on perm; 1.00% to 2.00% on bridge. Negotiable on competitive bake-offs; relationship lenders sometimes waive on repeat business.
Lender legal cap: typically $25K to $75K on perm; $40K to $125K on bridge. The cap is an out-of-pocket cost to the borrower paid at closing. Negotiate the cap explicitly at term sheet; lender legal that exceeds the cap is typically billed back to the lender.
Third-party reports: appraisal ($8K to $25K depending on property type and complexity), Phase I environmental ($3K to $8K, more if Phase II is triggered), PCA ($5K to $15K), zoning report ($1.5K to $5K), seismic where required ($5K to $15K). Total typically $20K to $60K on a stabilized perm.
Title and survey: title premium typically $0.50 to $2.00 per $1,000 of loan amount (rate-regulated in some states), endorsements add $1K to $10K depending on count. Survey $4K to $15K for new; $1.5K to $5K for re-certification of recent survey.
Borrower legal: $25K to $75K depending on complexity. Insurance binder cost (one-time setup): $1K to $5K. Recording fees and transfer taxes vary materially by jurisdiction.
Sponsor coordination across multi-property refi waves
Sponsors with multi-property portfolios often face refi waves, five to ten properties maturing within the same 12-month window. Coordination across these refis requires more than just running each individually.
Sequencing: refi the smallest, simplest deals first to validate the lender options's pricing before committing the larger deals. Refi the deals with the tightest open-prepay-window timing first. Refi the deals where rate-environment risk is highest (deals with the largest projected savings if rates fall further) earliest in the wave.
Lender allocation: sponsors that do five refis with the same lender in the same quarter typically get tighter pricing on the fifth than the first because the lender is competing harder to retain the relationship. Spreading across two or three lenders preserves the relationship leverage for future deals.
Operational capacity: borrower counsel, sponsor accounting team, property management reporting all face capacity constraints during a refi wave. Build the wave's calendar around the binding capacity constraint, not the loan-by-loan optimal timing.
Cross-collateralization risk: avoid refis that cross-collateralize previously stand-alone properties unless the cross-collateralization produces explicit pricing benefit. Cross-collateralization gives the lender broader recourse and reduces the borrower's flexibility on subsequent property sales.
When to walk away from a refi mid-process
The decision to abandon a refi after the bake-off is rarely emotionally easy but sometimes financially correct. Triggers for abandonment: market rates moved adversely between bake-off and rate lock such that the refi math no longer works, the lender retraded a key term and the runner-up LOI is no longer hot, or the property's diligence revealed an issue that materially changes the underwriting (low appraisal, environmental finding, structural issue).
Sunk costs: third-party reports and lender legal already incurred are not recoverable. The deposit may or may not be refundable depending on LOI language. The decision to walk vs. close should be made on go-forward economics, not on recovery of sunk costs.
Re-engagement strategy: walking away from a refi today does not preclude re-running the bake-off in 60 to 90 days when conditions change. Most lenders are willing to re-engage on a deal that walked for legitimate reasons; the placement firm's reputation matters here for keeping the bench warm.
The do-nothing alternative: holding the existing loan and managing through to the open prepay window or to maturity is sometimes the best outcome. The math of holding (continued debt service at the existing rate, no closing costs, no execution risk) sometimes beats the math of refinancing (new rate plus closing costs plus execution risk plus prepay penalty).
Senior-mezz intercreditor: governs cure rights, standstill, and enforcement. Borrower-friendly intercreditor terms preserve mezz cure optionality and constrain senior unilateral enforcement; lender-friendly terms favor the senior at the expense of the mezz and the borrower. The intercreditor terms are negotiated at the senior LOI stage and are very hard to change later.
Decision framework: total cost of senior plus mezz vs. cost of senior alone at lower leverage plus required incremental common equity. The mezzanine debt choice typically wins when the sponsor wants to preserve common-equity ownership percentage and the cost of mezzanine debt is below the sponsor's required return on common equity.
Frequently asked questions
Can I refinance a CMBS loan before the open prepay window?
Yes, by defeasing, substituting a Treasury portfolio for the property collateral. The cost depends on the gap between current Treasury yields and the loan rate; can be very expensive in declining-rate environments. The defeasance break-even should be modeled before signing the new loan.
How long is the seasoning requirement for an agency cash-out refi?
Typically 12 months from acquisition for both Fannie DUS and Freddie Optigo cash-out programs. Some lenders waive seasoning for sponsors with strong track records and properties acquired below market.
Should I refinance to lock in a fixed rate when current rates are higher than my floating-rate bridge?
Depends on the rate path expectation and the property's stabilization status. If the property is stabilized and the sponsor's plan is a long-term hold, locking into a higher fixed rate now to hedge against further increases can be the right call. If the property is mid-stabilization or the sponsor's plan is a sale within 18 months, holding the floating rate (with rate-cap protection) is typically the better choice.
What's the typical timeline from refi decision to funding?
On a clean stabilized refi: 60 to 90 days. Bridge to perm: 75 to 120 days. Agency: 90 to 120 days. CMBS: 75 to 105 days. HUD: 6 to 9 months. Sponsors with refis approaching the open window should start the bake-off 90 to 120 days before the open date to allow time for execution and closing.
Sources
- Quarterly Survey of Commercial/Multifamily Mortgage Bankers Originations · Mortgage Bankers Association · 2026-Q1
- Commercial/Multifamily Mortgage Maturities Outlook · Mortgage Bankers Association · 2026-02
- Treasury Constant Maturity Series (DGS5, DGS10) · Federal Reserve Bank of St. Louis (FRED) · weekly
- Multifamily Market Commentary · Fannie Mae Economic & Strategic Research · 2026-Q1