Days Sales Outstanding (DSO) is one of the most actionable components of the Cash Conversion Cycle. Every day you reduce DSO frees up working capital.
At $5M ARR with 30-day DSO: $5M ÷ 365 × 30 = $411k tied up in AR. Reduce DSO to 15 days: AR drops to $205k — $206k freed up immediately.
Tactic 1: Require upfront annual payment with a discount
The most powerful DSO lever in SaaS: offer 15–20% annual discount for prepayment. Annual payers have DSO = 0 the moment they pay. Monthly payers on invoices have DSO = 30–60.
Moving 30% of customers from monthly to annual can cut DSO in half.
Tactic 2: Switch from invoice to automatic card billing
Monthly invoices create DSO. Automatic card charges have DSO ≈ 0 (aside from settlement processing, which is 1–2 days).
For self-serve and SMB customers: require automatic billing. For enterprise: keep invoicing but tighten terms.
Tactic 3: Automate collections sequences
Set up automatic reminder emails: - 3 days before due: "Invoice due soon" - Day 0 (due date): "Invoice due today" - Day 7: "Invoice overdue" - Day 14: "Second notice — payment required to avoid service interruption"
Automated sequences reduce DSO by 30–50% vs. manual follow-up.
Tactic 4: Shorten standard payment terms
Net 60 → Net 30 → Net 15 → Due on receipt. Each reduction directly cuts maximum DSO. Large customers may push back. Hold firm on standard terms for smaller accounts.
Tactic 5: Require ACH/wire for enterprise
Credit card chargeback risk incentivizes some enterprises to delay. ACH payments are faster and have no chargeback risk. Offer ACH as the default for enterprise invoices.
Use the Cash Conversion Cycle Calculator to see how DSO improvements affect your total CCC.