Reducing DSO (Days Sales Outstanding) remains a top priority for finance departments and credit managers. However, traditional levers (manual dunning, Excel spreadsheets, artisanal tracking) are no longer sufficient.
In 2026, performance depends on a global approach to the customer cycle: Order to Cash (O2C). In other words, from order-taking to payment, each stage must be reliable, connected and data-driven.
In this article, here are 7 concrete levers to reduce your DSO sustainably, with examples from the field and a focus on the platform Aston AI platform.
In short: DSO is the average time it takes for your customers to pay. To reduce it, you need to take action throughout the entire process, from order placement to payment collection:
- ensure the reliability of the order from the very beginning;
- bill quickly and accurately;
- resolve disputes quickly;
- prioritize follow-ups based on scoring;
- track cash and commitments in real time;
- involve front-line staff;
- data-driven decision-making.
1. Making orders reliable from the outset
It all starts with a clear, complete and compliant order. An error at this stage can quickly generate a dispute, delay invoicing or block payment.
Best practices :
References validated by the customer
Terms and conditions signed in advance
Unified customer data (reliable basis, well-defined roles)
Why is this strategic?
One incorrectly entered order, one incorrectly referenced customer, and the whole O2C cycle is thrown into disarray. That’s why the most advanced companies are digitizing purchase orders, adding real-time controls and relying on a single customer repository.
Discover Aston Cash Collection, the automated debt collection software that
Turn your customer base into a growth driver created by Aston AI.
2. Accelerate error-free invoicing
The speed and quality of invoicing are crucial. A missing or poorly worded invoice can easily cost you 15 days’ cash.
Key levers :
Automatic invoice generation
Triggered on delivery or validation
Systematic check of mandatory information
Trend 2026
More and more companies are switching to compliant electronic invoicing (Factur-X, e-invoicing). In this way, invoices are better integrated with ERP systems and more easily transmitted via customer portals.
3. Centralize disputes and process them quickly
An unprocessed dispute means an unpaid invoice. As a result, successful companies equip themselves with a dispute management module connected to the customer workstation.
Useful tools :
Litigation file by customer with history
Automatic categorization (quality, delivery, price…)
Real-time follow-up with operational staff
Zoom in
Some industrial groups have reduced blocking disputes by 30% simply by automating their detection (price discrepancies, quantity errors) and triggering alerts for sales or logistics.
4. Prioritize reminders according to scoring
Not all reminders are created equal. The aim is to target the right customers at the right time, using the right channel.
Winning practices :
Up-to-date customer scoring (payment behavior, risk)
Automated profile-based scenarios
Centralized stock history
Note
The most advanced companies combine predictive scoring (AI) and behavioral analysis. In this way, they adapt the tone and timing according to the type of customer (slow but reliable, or recurrent bad payer).
5. Track cash and promises in real time
The objective is simple: to know in a single click who has paid, who has committed to pay, and who is drifting. To achieve this, you need a platform connected to bank flows and ERP.
Direct gains :
Real-time view of cash
Cash flow forecasts based on promises
Abnormal delay alerts
Example
A service company reduced its forecast variances by 40% by integrating customer promises and cross-referencing payments, commitments and outstandings in a single cockpit.
Read user reviews from those who have chosen to trust Aston AI with their debt collection follow-ups.
6. Involve operational staff in customer follow-up
Reducing DSO doesn’t just rely on finance. On the contrary, the most efficient companies also involve sales staff, sales reps and managers in monitoring customer receivables.
Collaborative levers :
Task allocation by portfolio
Customized alerts
Simple, actionable reporting
What we see
Sales people intervene more easily when they have the right tools at their disposal (clear dashboards, CRM reminders, visible scoring). Result: blockages are resolved more quickly.
7. Drive by data, not intuition
DSO is the result of a system. Therefore, data becomes the key driver of continuous improvement.
Indicateurs à suivre :
Overall DSO and DSO by segment
Recurring litigation rate
Average processing time
Amounts raised vs. cashed
Bonnes pratiques
Les meilleurs CFOs suivent ces KPIs dans un cockpit consolidé, avec des alertes en cas de dérive. En parallèle, des rapports réguliers sont partagés aux équipes terrain.
How much would a reduction in your DSO save you? Use our ROI simulator to find out.
Causes of a High DSO
A high DSO is most often due to five causes:
- delays in customer payments;
- billing errors or delays;
- missing or unclear reminders;
- payment promises that were not properly followed up on;
- Managing the process in Excel: no automation, no real-time monitoring, and difficulties in setting priorities.
The Projected DSO: Anticipating Rather Than Reacting
DSO doesn’t just measure the past. With Aston AI’s predictive modules, it can be used to forecast cash flow 30, 60, or 90 days in advance. You can spot a deviation before it happens, simulate customer payment delays, and adjust your short-term financing accordingly.
Why DSO Matters for a Company's Value
A well-managed DSO improves working capital: less short-term debt and less need for financing. This sends a strong signal to investors during a fundraising round, a sale, or an audit. Yet it is often overlooked in small and medium-sized businesses.
To calculate your DSO step by step, read our guide: How to Calculate DSO.
Customer cases (anonymized)
Food industry: DSO reduced from 72 to 58 days in 6 months thanks to automated reminders, dynamic scoring and faster processing of disputes. Result: +350 K€ in cash.
B2B services: redesign of reminder process, to-do list by manager, monitoring of customer promises → collection +12% over one quarter, without additional sales pressure.
Multi-subsidiary group: harmonized invoicing, shared dashboards, automatic alerts → DSO -9 days and improved finance/commerce coordination.
Aston AI: a predictive and connected platform for your O2C
Aston AI supports finance departments with a platform designed to manage the end-to-end Order to Cash cycle:
Dunning, disputes, scoring, collections
ERP and banking connections
Cash flow forecasting and promise tracking
Collaborative tasks by portfolio
Intelligent notifications and unified reporting
Thanks to Aston AI, each user (manager, credit manager, CFO) can monitor his or her KPIs, dunning effectively, anticipating risks and sharing key information with the right contacts.
On average, users see a -10 to -15 day reduction in DSO within the first 6 months, with an automation rate of over 70%.
Frequently Asked Questions About Reducing DSO
What is DSO?
DSO (Days Sales Outstanding) is the average time it takes for your customers to pay.
What are the strategies for reducing DSO?
Improve order reliability, speed up billing, resolve disputes quickly, prioritize follow-ups based on scoring, track cash flow and commitments in real time, involve operational staff, and drive decision-making with data.
What metrics should you track to manage your DSO?
The overall DSO and DSO by segment, the recurring dispute rate, the average processing time, and the amounts subject to collection efforts compared to the amounts collected.
What results can we expect from Aston AI?
On average, users see a reduction of 10 to 15 days in DSO within the first 6 months, with more than 70% of actions automated.
