DSO tells you how fast you're collecting. Response rate tells you if it's about to get worse.
DSO is a lagging metric — it confirms a problem that's already 30 days old. Response rate is the early warning. When customers stop replying, cash stops flowing. Every time.
Watch them together: ↳ High response + low DSO = you're winning, don't change a thing ↳ Low response + high DSO = stop sending emails, pick up the phone ↳ Low response + low DSO = autopay accounts, leave them alone ↳ High response + high DSO = process friction, fix it internally
Most teams obsess over DSO and ignore response rate entirely.
That's why the same conversations keep happening every quarter.