Quick Answer
AI invoice processing cuts invoice handling time by up to 93 percent, based on customer results published by ABBYY, SS&C Blue Prism and Basware. Certas Energy, the largest independent fuel distributor in the UK, went from up to 30 minutes per invoice to about 1 minute using ABBYY OCR plus a Blue Prism digital worker. Companies without automation average $12.88 and 17.4 days per invoice, according to Ardent Partners State of ePayables 2024.
- Sonic Drive-In reached about 97 percent electronic invoice handling with Basware. SONIC processes roughly 450,000 invoices a year across more than 3,500 company-owned and franchise locations, saved $160,000 a year in off-site paper storage, and reduced AP headcount from 19 to 13.
- PAPCO cut manual AP labor by roughly 50 percent with ABBYY FlexiCapture. The energy solutions supplier handles more than 600,000 invoices a year from over 1,000 vendors, cut daily processing time by up to 6 hours, and moved invoice approval from an hour a day to a couple of minutes.
- Structured e-invoicing removes OCR, not the approval work. Italy routes every domestic B2B and B2G invoice through the Sistema di Interscambio (SDI) as structured XML, but matching an incoming e-invoice against a purchase order or delivery note and routing exceptions to the right approver stay manual at most companies.
The Invoice Processing Bottleneck
Companies without automated accounts payable processes spend an average of $12.88 to process a single invoice and take 17.4 days to get it approved, according to Ardent Partners' State of ePayables research. Best-in-class AP teams save more than $10 per invoice and cut roughly two weeks off that timeline. That gap between average and best-in-class is most of the business case for intelligent document processing (IDP), and it's why the category has moved from a back-office experiment to a board-level line item.
Invoice Automation, By the Numbers
Three named, published customer results are below. None of them are hypothetical, and none of them come from us. They're what ABBYY, Blue Prism, and Basware have put their own names behind.
The Hidden Costs Behind the Sticker Price
The $12.88-per-invoice average above only counts direct processing labor. Duplicate payments, missed early-payment discounts, and staff hours spent chasing down exceptions by hand all sit on top of it. Those costs show up in the AP team's time, not on an invoice.
AI Document Processing: How It Works
Modern IDP systems combine multiple AI technologies for end-to-end automation:
OCR + Computer Vision
Extracts text from any format - scans, PDFs, photos, emails
NLP Understanding
Interprets context, not just characters - understands "total due"
Machine Learning
Learns from corrections, improves accuracy over time
Validation Rules
Cross-checks against POs, contracts, and master data
Case Study #1: Certas Energy — 93% Faster With OCR and RPA
Certas Energy, the UK's largest independent fuel distributor, has around a thousand suppliers and an accounts payable team that used to key in data from hundreds of thousands of invoices a year by hand. Fuel volumes shift slightly in transit, so even the matching logic had to tolerate small variances between the goods-received note and the invoice. That's not the kind of judgment call you automate carelessly.
Certas paired ABBYY's OCR with an SS&C Blue Prism digital worker (internally nicknamed "Sir Lancelot") that logs into the ERP, matches invoiced items against the goods-received note, tolerates the expected in-transit variance, and completes the reconciliation.
Certas Energy Results
| Invoice Processing Speed | 93% faster |
| Per-Invoice Time | Up to 30 min → 1 min |
| Turnaround | Same day received |
| Annual Volume | Hundreds of thousands of invoices |
The AP staff who used to spend their days keying in data now spend it on the invoices the digital worker flags as genuinely ambiguous. For a business handling variable fuel quantities, that's exactly where a person should be spending judgment.
Case Study #2: Sonic Drive-In — 97% Touchless With Basware
SONIC, America's Drive-In, runs its accounts payable across more than 3,500 company-owned and franchise locations and processes roughly 450,000 invoices a year. Before automating with Basware, the chain kept seven years of paper invoices in off-site storage — a cost that disappeared along with the paper.
Sonic Drive-In Results
| Invoices Processed Electronically | ~97% |
| Paper Storage Savings | $160,000/year |
| AP Headcount | 19 → 13 (25%+ reduction) |
| Annual Volume | 450,000 invoices |
AP headcount fell from 19 to 13, a reduction Basware attributes to the automated capture of invoices that used to require someone to key them in.
Case Study #3: PAPCO — From an Hour a Day to a Couple of Minutes
PAPCO, an energy solutions supplier in the eastern United States, processes more than 600,000 invoices a year from over 1,000 vendors. Its AP staff were, in ABBYY's own description, working overtime and weekends just to keep up.
PAPCO Results
| Daily Processing Time | Cut by up to 6 hours/day |
| Labor Reduction | ~50% |
| Invoice Approval Time | 1 hour/day → a couple of minutes |
| Annual Savings | $30,000 |
| Annual Volume | 600,000+ invoices, 1,000+ vendors |
PAPCO scans incoming paper through network copiers, and ABBYY FlexiCapture extracts, classifies, and routes the data to the right AP staff for verification. The team went from working weekends to closing out invoices inside a normal week, and PAPCO has since extended the same approach to freight and fuel invoices.
Italian SME Context: Fatturazione Elettronica
Italy's mandatory electronic invoicing system routes every domestic B2B and B2G invoice through the Sistema di Interscambio (SDI) in structured XML format. That structure is exactly the kind of input intelligent document processing handles well, since the data is already machine-readable before OCR even enters the picture.
Where AI still adds value for Italian SMEs is on the two sides SDI doesn't automate by itself: matching an incoming e-invoice against a purchase order or delivery note, and routing exceptions to the right approver. Those steps stay manual at most companies regardless of the mandate, because SDI standardizes the invoice format, not the approval workflow built around it.
Platform Comparison: Document Processing AI
| Platform | Best For | Starting Price | Key Strength |
|---|---|---|---|
| ABBYY Vantage | Complex documents | €0.10/page | Best OCR accuracy, 200+ languages |
| Basware | Enterprise AP | €50K+/year | End-to-end AP, supplier network |
| Kofax | High volume | Custom pricing | RPA integration, workflow automation |
| Custom AI Solution | Unique formats | €20,000-80,000 | Tailored to specific document types |
ROI Calculator: Invoice Processing Automation
Sample ROI Calculation (50,000 Invoices/Year)
| Current cost per invoice | €15 |
| Total annual processing cost | €750,000 |
| AI processing cost per invoice | €3 |
| New annual processing cost | €150,000 |
| Annual savings | €600,000 |
| Implementation cost | €75,000 |
| Early payment discounts captured | +€50,000 |
| First Year ROI | 767% |
Where Invoice Automation Fits in a Broader Finance Stack
Invoice processing is rarely the only finance workflow worth automating. If you're evaluating this alongside other back-office work, our finance and accounting automation guide covers the wider toolset, and the workflow automation guide for small businesses is a good next stop if invoice processing is your first automation project rather than your fifth.
Before signing anything, run the numbers with our AI ROI calculator against your own invoice volume and current cost per invoice. The Ardent Partners averages above are a starting point, not your number.
Implementation Best Practices
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Request Free Assessment →Key Takeaways
- ✅ 93% faster processing at Certas Energy, verified via SS&C Blue Prism
- ✅ 97% of invoices handled electronically at Sonic Drive-In, verified via Basware
- ✅ Roughly 50% less manual labor at PAPCO, verified via ABBYY
- ✅ Industry average without automation: $12.88 and 17.4 days per invoice (Ardent Partners)
- ✅ Structured e-invoicing like Italy's SDI removes the OCR step but not the matching and approval work
Sources: SS&C Blue Prism: Certas Processes Invoices 93% Faster, Basware: Sonic Drive-In Case Study, ABBYY: Automated Invoice Processing Case Study (PAPCO), Bottomline, citing Ardent Partners' State of ePayables 2024
Key statistics (2025)
Further reading
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AI Solutions6 min2025-12-03
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