This year’s refinancing cliff is the real rub, says Scott Rechler, CEO of RXR, a closely-held Manhattan development firm. Loans that come due will have to be financed at higher interest rates, which will mean higher payments even as vacancy rates rise or remain high. Higher vacancies mean some buildings are worth less, so banks are less willing to touch them without tougher terms. That’s especially true for older, so-called Class B buildings that are losing out to newer buildings as tenants renew leases, he said. And the shortage of recent sales makes it hard for banks to decide how much more cash collateral to demand.