An affordable housing deal that runs on tax-exempt bonds or a construction-to-permanent loan can carry interest rate risk for a long stretch, from the day you size the financing to the day the permanent rate is set, often 18 to 36 months out. How much risk you actually carry depends on the structure. Hedging is how you close the gap when the rate is left open.
The risk lives between commitment and conversion
How much rate risk you carry depends on the structure. Some deals lock the permanent rate at the front end, so it is fixed at or near initial closing and the conversion-rate risk is off the table. Others leave the construction loan floating with the permanent rate not set until conversion. Where the rate is left open, a rise before conversion shrinks the permanent loan, and a financing that penciled at underwriting no longer works. The construction loan itself usually floats either way. The lender almost always requires you to address the exposure, but the right tool, and whether you need one at all, depends on which structure you are in.
Two instruments, often both
A rate cap protects the floating construction rate. It sets a ceiling, so if rates spike during construction your cost cannot exceed the strike, while you keep the benefit if rates stay low. Where the permanent rate is not already locked, a forward-starting swap or rate lock can fix it today for a loan that funds later, removing the uncertainty about where it lands at conversion. Not every deal offers that option, and where a lender does provide a forward lock, it is not free: the cost is embedded in the rate, and the real question is whether the lender's price beats hedging the exposure yourself. Many deals pair a cap over construction with a fixed permanent rate, locked by the lender or by a forward swap. Which combination fits depends on the construction timeline, the conversion date, your prepayment and exit plans, and how much certainty the capital stack needs.
Sizing and timing are where deals go wrong
The hedge has to match the loan it protects. A swap sized to the wrong notional, or struck to the wrong start date, leaves you over- or under-hedged, and either one costs money. The forward start has to line up with the expected conversion, the notional has to track the permanent loan and its amortization, and the term has to reflect how long you actually intend to hold the rate. Getting these right is a modeling exercise against the asset plan, not a form to fill out.
What it costs, and who prices it
Every cap and every swap is priced by a bank that sits on the other side of the trade, and each one is documented in an ISDA that is anything but standard. The all-in number blends a fair mid-market rate with a credit charge and the bank's margin, and without an independent benchmark you cannot see how much of the quote is which. On a multiyear financing, a few basis points of unnecessary cost is real money pulled out of the deal.
Where an independent advisor fits
We work only for the developer. We model the cap and the swap against your asset plan and recommend the structure that fits, including whether a lender's forward rate lock, where one is offered, is priced competitively against hedging the exposure yourself, run a competitive or negotiated procurement, benchmark the bank's pricing against an independent mid, negotiate the credit charge, and protect your non-recourse structure in the ISDA. We do not take a position in the trade and we are not paid by the bank.
If you have a tax-exempt bond or construction-to-permanent deal coming together, the rate is one of the few terms you can lock before it moves against you. Get an independent read before you sign.