The verdict in three sentences
For a 70-unit shopping centre, in Rennes or Toronto, money leaks in three places: missed rent indexations, percentage rent calculated on late tenant sales reports, and a service charge reconciliation (CAM reconciliation in North America) that drags on for 3 months and fuels disputes. Off-the-shelf property software at 15,000-40,000 EUR a year covers standard lease administration but handles percentage rent and tenant relations poorly. Custom software at 50,000-120,000 EUR (about 54,000-130,000 USD) pays off once it cuts reconciliation to 3 weeks and secures 1 to 2% of billed rent.
Where a shopping centre loses money
The manager of a suburban centre or downtown gallery runs 9-year commercial leases (often 5 to 10 years in Canada), indexation clauses, hybrid rents (guaranteed minimum plus a share of sales), a service charge budget split by floor area shares, and legal charge disclosure obligations. All of it usually lives between accounting software, spreadsheets and email reminders.
| Item (70 units, 4.2M EUR annual rent) | Frequent situation | Estimated 2026 annual impact |
|---|---|---|
| Rent indexations applied late | 6 of 70 leases with a 4-month lag | 9,500 EUR lost |
| Percentage rent on sales not reported on time | 15% of tenants late | 28,000 EUR of delayed cash |
| Service charge reconciliation in 3 months | disputes on 12% of units | 35,000 EUR of blocked adjustments |
| Non-recoverable charges misallocated | wrong allocation keys | 18,000 EUR |
| Admin time (2 property managers) | 40% on re-keying and chasing | 52,000 EUR of payroll |
| Total, order of magnitude | about 142,500 EUR |
These amounts represent about 3.4% of rent. Recovering only half funds custom software in under two years.
Off-the-shelf or custom: 2026 comparison
Property management platforms (Yardi, MRI, Altaix, Septeo and similar) are solid for owner accounting and rent invoicing. Gaps appear around percentage rent, tenant sales collection and the tenant portal.
| Criterion | Off-the-shelf property software | Custom build by Kolonell |
|---|---|---|
| Entry cost | 5,000 to 20,000 EUR setup | 50,000 to 120,000 EUR |
| Annual cost | 15,000 to 40,000 EUR in licences | maintenance 35,000 to 120,000 FCFA per month, about 640 to 2,200 EUR a year |
| Automatic rent indexation | yes | yes, with alerts and history per lease |
| Percentage rent on sales | often via Excel import | entered by tenant, checked and calculated automatically |
| Service charge reconciliation | standard module | per-unit statements, supporting documents attached |
| Tenant portal | rare or paid add-on | included: invoices, sales reports, maintenance requests |
| Time to go live | 2 to 4 months | 12 to 20 weeks |
A hybrid set-up is common: the existing platform keeps accounting, the custom layer handles percentage rent, reconciliation and the portal, with a daily sync.
Priority modules
| Module | Function | Indicator |
|---|---|---|
| Lease register | dates, steps, rent-free periods, indexation clauses | expiry alerts at D-90 |
| Indexation | quarterly index calculation and amendments | zero missed indexation |
| Tenant sales | monthly online reporting, automatic reminders | 95% of reports by D+10 |
| Percentage rent | calculation of the variable share above the guaranteed minimum | billing variance under 0.1% |
| Service charge reconciliation | budget, actuals, allocation by share, supporting documents | reconciliation in 3 weeks |
| Tenant portal | documents, maintenance tickets, messages | disputes divided by 3 |
Tenant sales data is also a steering tool: comparing occupancy cost ratios (rent plus charges over sales) per tenant helps anticipate departures before they leave a unit empty for 8 to 14 months.
Mini case study
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Isabelle manages a 70-unit shopping centre north of Rennes collecting 4.2M EUR in annual rent. Her reconciliation takes 3 months and 12% of units dispute it. She invests 85,000 EUR in custom software linked to her accounting platform. Estimated results: 9,500 EUR of recovered indexations, 18,000 EUR of better recovered charges, 0.8 FTE freed for leasing, i.e. 26,000 EUR. Annual gain: 53,500 EUR, payback in 19 months, before the 28,000 EUR cash effect on percentage rent. A Toronto centre of the same size would see similar ratios on CAD amounts.
FAQ
How much does shopping centre management software cost in 2026?
Off-the-shelf software costs 15,000 to 40,000 EUR a year in licences plus setup. Custom software ranges from 50,000 to 120,000 EUR depending on units and modules.
Does the software calculate percentage rent on sales?
Yes, tenants report sales online every month, the software applies the contractual rate and bills the variable share above the guaranteed minimum. Reminders go out automatically at D+5 and D+10.
Is the service charge reconciliation compliant?
Yes, charge categories, allocation and the annual statement are produced per unit with supporting documents, matching French Pinel rules or Ontario lease clauses. Statutory deadlines are tracked by alert.
Can we keep our current accounting system?
Yes, the hybrid set-up links the custom layer to your platform via API or a daily file. This avoids a heavy accounting migration.
How long until we are ready for the next reconciliation?
Allow 12 to 20 weeks. Starting early in the year lets you run the next reconciliation in the new tool.
Let's scope your project. Send us your number of units, current tools and priorities (indexation, percentage rent, reconciliation, portal) and we will price a precise scope with a schedule. 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.
