What is days sales outstanding?
Days sales outstanding is the average number of days between billing a client and receiving their money.
Also called DSO.
Days sales outstanding in plain words
It measures the gap on the receivable side alone. On a project, the meaningful version starts at the point work was completed rather than at the point the invoice was finally raised, because the delay before billing is delay all the same.
How is days sales outstanding calculated?
DSO = (receivables ÷ revenue for the period) × days in the period
Calculate it per client as well as overall. The average hides the one client who is funding themselves with your cash.
Days sales outstanding: a worked example
One quarter on a project, measured both ways.
- Receivables at period end
- ₹31.0 Cr
- Revenue in the quarter
- ₹30.0 Cr
- Days in the period
- 91
- Calculation
- 31.0 ÷ 30.0 × 91
- DSO from the invoice date
- 94 days
Measured from the day work was completed instead, the same quarter gives 117 days. The 23-day difference is certification — delay that the standard formula cannot see.
Why does days sales outstanding matter?
It is the single clearest measure of whether your clients' payment behaviour is getting better or worse, and it is the number a lender looks at first.
What is a good DSO?
| Compare against | What it tells you |
|---|---|
| Your contract's payment terms | Whether the client is late, or the terms are simply long |
| The same client last quarter | Whether their behaviour is changing |
| Your own certification time | How much of the wait is yours rather than theirs |
| An industry average | Very little — scope, terms and billing cycles differ too much |
There is no universal good DSO. The only comparisons that carry information are against your own terms and your own history.
Where does days sales outstanding mislead?
A DSO measured from the invoice date rewards you for billing late. If certification takes three weeks before an invoice can even be raised, a healthy DSO can sit on top of a badly delayed cycle.
What do people get wrong about days sales outstanding?
- Measuring from the invoice date only
- It rewards you for billing late. If certification takes three weeks before an invoice can be raised, a healthy DSO can sit on top of a badly delayed cycle.
- Reporting the average across clients
- The average hides the one client funding themselves with your cash. Per-client DSO is the version that leads to an action.
- Ignoring retention inside it
- Retention has no due date in most systems, so it ages quietly inside receivables and inflates DSO without anyone owning it.
How does Crestline measure days sales outstanding?
Crestline reports DSO per client and per project, measured from work completion as well as from the invoice date, so the share of the wait that is yours is separated from the share that is theirs before anyone picks up the phone.
The client lens