Business Case 04

How milestone billing improves solar cash flow by 40%

Cash flow is the lifeblood of a solar EPC company. Manual billing means invoices raised late, payments collected slowly and missed milestones that simply never get billed. Milestone-triggered automation fixes all three - here is the financial case.

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Cash flow impact - $200K monthly revenue

Current Days Sales Outstanding (DSO)32 days
DSO with milestone-triggered billing18 days
Cash flow improvement (14-day reduction)+$7,671/mo
Estimated missed invoices (10% of milestones)−$20,000/mo
Recovered from automated milestone billing+$20,000/mo
Total monthly cash flow improvement+$27,671

The evidence

3 cash flow problems milestone billing solves

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Problem 1 - Delayed invoicing raises DSO

When billing is manually triggered, invoices are raised 5–15 days after the milestone is complete. On $200K of monthly billings, a 14-day average delay at a 12% cost of capital equals $917/month in pure financing cost. Across a year that is $11,000+ - before accounting for the operational friction of chasing late payments.

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Problem 2 - Milestones completed but never billed

In a manual billing process, project completions pile up and individual milestone invoices get forgotten - especially on projects with many billing tranches. Industry estimates suggest 8–12% of milestone billing events are either delayed by more than 30 days or missed entirely in companies without automated billing systems.

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Problem 3 - Partial payments not tracked

When a client pays partially against an invoice, the unpaid balance often falls out of sight in a manual system. Finance teams re-discover it weeks later during reconciliation. Outstanding balance tracking in SolarCRM flags partial payments immediately and alerts the collections team - so nothing sits unresolved.

Cash flow calculator

Calculate your milestone billing impact

Your billing numbers

Your cash flow improvement

DSO now → with milestone billing

32 days → 18 days

DSO reduction cash flow value

$921/mo

Recovered from missed invoices

$20,000/mo

Total monthly cash flow improvement

$20,921/mo

14days
Average DSO reduction
with milestone-triggered billing
40%
Cash flow improvement
vs manual invoice process
0 missed
Billing milestones
auto-triggered on completion
100%
Invoice accuracy
vs manual process

Customer result

Real impact, real numbers

"

Before SolarCRM, our finance team spent every Monday morning chasing project managers to find out which milestones had been completed that week so we could raise invoices. Half the time the information was wrong. We would discover a completed phase that had been sitting uninvoiced for three weeks. Milestone-triggered billing ended that problem completely. Our DSO dropped from 38 days to 19 days in four months.

38 → 19days DSO improvement in 4 months
JT
James Thornton
CEO · BrightField Energy · Sydney, Australia

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