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Vacation Rental Operator

How Welcome In Made €135K in Overbilling Structurally Impossible

330 individual vacation homes across Zeeland. External cleaners billing for hours they didn't work. €100K lost before anyone noticed. Here's how we fixed it — permanently.

€135.000+
Annual savings
20 hrs/week
Time saved
450%
Return on investment
How Welcome In Made €135K in Overbilling Structurally Impossible
Systems
PMS, Internal Admin Tooling
Scope
330 individual vacation homes across Zeeland
Timeline
8 months (80% impact in month 1)
Teams
Operations, Finance

The Company

Welcome In operates 330 individual vacation homes across Zeeland, Netherlands. With dozens of external cleaning teams handling turnover between guests, maintaining quality and cost control is mission-critical.

But behind the scenes, a €100,000+ problem was quietly draining profits — and nobody realized until it was too late.

The painful reality

Cleaners were systematically overbilling for hours they didn't work. A 2-hour cleaning job was invoiced as 5 hours — routinely. Finance discovered this only months later, after the money was already paid and gone.

The damage: €100,000+ per year in unrecoverable losses. Meanwhile, Welcome In's finance team spent 20+ hours per week manually verifying invoices. Exhausting, ineffective, and unsustainable.

The real problem (it wasn't the cleaners)

Most companies would blame the cleaners. Welcome In's owner saw deeper:

"The system made fraud easy. Cleaners submitted their own invoices. Hours were self-reported. No verification happened until weeks later. The process invited overbilling. This wasn't a people problem. It was a process design problem."

Instead of adding more controls, Welcome In chose a different path: make overbilling structurally impossible.

The challenge

The €100K problem nobody saw coming

Systematic overbilling: a 2-hour cleaning job invoiced as 5 hours — routinely, across dozens of cleaning teams.

Discovery lag: overbilling found months later, money already paid and gone. €100K+ per year in unrecoverable losses.

Manual verification hell: finance team spending 20+ hours per week checking invoices. Trust eroded into an adversarial relationship.

Our approach

Make overbilling structurally impossible

1

Planning as source of truth

Cleaning tasks pulled directly from the PMS based on booking schedule and property type. No interpretation, no flexibility. The system knows what needs cleaning and when.

2

Fixed rates per property

Instead of variable invoices based on 'hours worked,' fixed rates per property type. Studio = €45, two-bedroom = €75. Period. No matter how long it takes.

3

Automated work orders

Work orders generated automatically from PMS and sent to cleaners. These become the single source of truth. Cleaner arrives, scans QR code, job marked complete.

4

System-generated invoicing

Invoices generated on behalf of cleaners based on completed work orders. Cleaners don't submit invoices anymore. They just do the work. The system handles the rest.

The solution

What changed

Overbilling is structurally impossible. Planning determines work orders. Work orders determine invoices. No gaps, no gray areas, no room for fraud.

Full implementation in 8 months, but 80% of benefits arrived in month 1 when automated work orders went live. Only 2% of Welcome In's team time invested.

Scalable system running 330 properties on autopilot. Can add 100+ properties with zero additional overhead. Finance team freed for strategic work.

Implementation

Quick wins, lasting results

M1

Work order system goes live

Automated work orders deployed for all properties. Cleaners start receiving tasks directly from the system.

80% of overbilling eliminated immediately
M2-4

Invoice automation rollout

System-generated invoicing replaces manual submissions across all cleaning teams.

Finance workload: 20h/wk to 2h/wk
M5-8

Process optimization

Fine-tuning fixed rates based on actual data. Adding exception handling for edge cases.

Zero-maintenance mode achieved

Key insight

Moppi's team invested only 2% of their time on the project. Training was minimal: 1-2 hours per person. The system runs autonomously — no manual intervention needed.

Before & after

The transformation

Before
After
Annual overbilling
€100,000+
€0
Manual work
20+ hrs/week
0 hours
Invoice processing
100% manual
100% automated
Trust in invoices
Low (constant checking)
High (system guarantees)
Cleaner relationship
Adversarial
Partnership
Results

Measurable impact

€135K
Annual cost savings
100%
Fraud prevention
0 hrs
Manual invoicing
330
Properties automated
"Synrfy didn't just help us save €35,000 in administrative costs — they also plugged a €100,000 leak from overbilling. We now have complete confidence in our numbers and can focus on growth."
G

Gijs Meerdink

Owner, Welcome In

Why this matters

What it looks like in practice

The system now runs autonomously. Every two weeks, a new run is generated. Work orders are created, sent to cleaners, and invoices are generated automatically.

Housekeeping Runs overview
Bi-weekly housekeeping runs — fully automated
Run detail with work orders
Work orders per cleaning team — auto-generated invoices
System-generated invoice
System-generated invoice — no manual input needed

The unexpected benefit: cleaners loved it

We expected resistance. Instead, cleaners were relieved. They no longer had to do admin work, estimate hours, worry about disputes, or submit invoices. They just show up, clean, and get paid — automatically.

The system transformed the relationship from adversarial ("we're checking your invoices") to partnership ("we trust you, the system handles the rest").

Result: cleaner satisfaction increased significantly. Turnover dropped. Quality went up. Win-win.

Key takeaways

1

Don't catch fraud — make it impossible. Process design beats surveillance every time.

2

80% of value came in Month 1. Work orders alone eliminated most overbilling.

3

Fixed rates > hourly billing. Removes incentive to inflate hours entirely.

4

System-generated invoices remove both human error and manipulation.

Start here

Still playing invoice police?

If your finance team spends hours checking invoices and discovering errors months too late, there's a structural fix.

Book a Process Audit

15 minutes. No commitment. No sales pitch.

What you get

  • 15-minute Process Audit call
  • One scoped operational process
  • Working Proof of Concept in 1 week
  • Clear next steps within 24 hours