Using disaggregated panel data, we examine how firms change trade credit in response to a monetary tightening. We find that both accounts payable and accounts receivable increase with tighter monetary policy, implying that trade credit helps firms absorb the effect of a credit contraction. Further, both S&P 500 firms and a comparison group of smaller firms increase net trade credit (accounts receivable minus payable), making up for the reduced liquidity associated with tighter policy. However, we find no evidence that large firms play this role more actively than smaller firms.