The verdict in three sentences
For a New York services company carrying USD 2.1 million in overdue receivables, automated dunning usually pays for itself within a quarter through released cash. A collections SaaS at USD 330 to 990 a month is enough if your customers look alike, while a custom tool at USD 9,000 to 22,000 pays off as soon as your sequences depend on segment, amount and payment history. Either way, plan 4 to 8 weeks and a gain of 10 to 18 days of DSO as a 2026 order of magnitude.
What manual dunning costs today
Many mid-size services firms in New York still chase invoices from a spreadsheet exported from QuickBooks, NetSuite or Sage Intacct. An AR clerk spends 2 to 3 days a month on reminders, treating an enterprise account 5 days late the same way as a small client silent for 60 days. DSO drifts to 65 to 75 days against net-30 or net-45 terms.
| Metric | Manual dunning | Automated dunning |
|---|---|---|
| AR staff time | 2 to 3 days/month | 0.5 day/month |
| Average DSO | 68 days | 50 to 58 days |
| Invoices chased on day 1 | 30 to 40% | 100% |
| Early dispute detection | Low | Reasons captured automatically |
| Cost of carrying receivables (5% rate) | USD 105,000/year | USD 77,000 to 88,000/year |
| Late fees applied per contract | Rarely | Systematic, rule-based |
SaaS or custom tool: the 2026 grid
The choice depends on how complex your sequences are and on your integrations.
| Criterion | Collections SaaS | Custom tool |
|---|---|---|
| Upfront cost | USD 0 to 3,300 setup | USD 9,000 to 22,000 |
| Recurring cost | USD 330 to 990/month | USD 165 to 440/month (hosting, maintenance) |
| Sequences per segment | 3 to 5 standard templates | Unlimited, free business rules |
| Channels | Email, sometimes SMS | Email, SMS, call tasks, certified letters |
| ERP integration | Standard connectors | Dedicated API or sync |
| Time to go live | 2 to 4 weeks | 4 to 8 weeks |
| 3-year total cost | USD 12,000 to 38,500 | USD 15,000 to 38,000 |
Over three years both options converge. Custom wins once you have more than 300 active customers, contract-specific payment terms or reporting needs for your CFO and lender.
Designing sequences by segment
A good tool does more than send emails. It applies logic: enterprise account with a named buyer, courtesy reminder at day -5 then a call from the account manager at day +10; small recurring client, email at day +1, SMS at day +7, demand letter at day +30. It pauses dunning as soon as a dispute is opened and embeds an ACH or card payment link to cut friction. The best projects add a customer portal where buyers download invoices and flag disagreements.
| Segment | Threshold | Typical sequence |
|---|---|---|
| Enterprise accounts | Over USD 55,000 | Day -5 email, day +10 call, day +25 CFO letter |
| Recurring clients | USD 5,500 to 55,000 | Day +1 email, day +7 SMS, day +15 call |
| Small clients | Under USD 5,500 | Day +1, +7, +15 email, day +30 demand letter |
| Disputed accounts | Any amount | Dunning paused, task to sales rep |
| Public sector | Any amount | Portal follow-up, prompt payment interest |
Mini case study
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Sarah, CFO of a services company in New York, runs USD 13 million in revenue with USD 2.1 million overdue. She picks a custom tool at USD 15,500 connected to NetSuite, delivered in 6 weeks. DSO falls from 68 to 54 days. With daily revenue around USD 36,000, 14 fewer days of DSO release about USD 500,000 in cash. At a 5% financing rate, that saves roughly USD 25,000 a year, plus 2 days of AR work recovered every month. Payback comes in 7 to 8 months.
FAQ
How much does a custom dunning tool cost in 2026?
Plan USD 9,000 to 22,000 depending on the number of sequences and ERP integration. Hosting and maintenance then run USD 165 to 440 a month.
What DSO gain can we expect?
As a 2026 order of magnitude, a services company cuts DSO by 10 to 18 days in the first 6 months. The gain depends mostly on dispute discipline.
Do automated reminders hurt customer relationships?
Not if sequences are segmented. An enterprise account gets a preventive reminder at day -5 and a human call, never an automatic demand letter.
Can late fees be applied automatically?
Yes, the tool can compute contractual late fees, often 1 to 1.5% a month, and add them to statements according to your rules.
How long until production?
A SaaS takes 2 to 4 weeks to configure, a custom tool 4 to 8 weeks, including a pilot on 50 customers.
Let's scope your project. We map your segments, channels and ERP integration for an indicative budget delivered in 4 to 8 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
