The verdict in three sentences
For a supplier of office and hygiene consumables serving 1,100 companies, a custom B2B subscription platform costs 30,000 to 70,000 EUR excl. VAT and ships in 3 to 5 months. It turns one-off orders placed by email into adjustable recurring deliveries, with a consolidated monthly invoice that accounting teams love. The expected effect, as a 2026 order of magnitude, is a 25 to 35% increase in recurring revenue and a clear drop in churn.
The features that matter in B2B
A consumer subscription boils down to one product, one frequency and one bank card. In B2B, you must handle several sites, several requesters, an approval workflow and payment by bank transfer or SEPA direct debit at 30 days. That explains the price gap with a simple Shopify subscription app.
| Feature | What it delivers | Indicative 2026 budget (EUR excl. VAT) |
|---|---|---|
| Adjustable recurring cart | Quantities editable until D-3, skip or postpone a delivery | 6,000 to 12,000 |
| Multiple frequencies | Weekly, fortnightly, monthly, per site | 3,000 to 6,000 |
| Multi-site accounts | One contract, several addresses, budgets per site | 5,000 to 10,000 |
| Purchasing approval | Thresholds per requester, one-click approval, history | 4,000 to 9,000 |
| Consolidated monthly invoicing | One invoice per entity, detail per site, accounting export | 5,000 to 11,000 |
| SEPA direct debit and credit limits | Mandates, automatic reminders, block above credit limit | 3,000 to 8,000 |
| ERP and stock integration | Stock reservation, delivery route preparation | 4,000 to 14,000 |
The essential tier, around 30,000 EUR excl. VAT, covers the recurring cart, two frequencies, the monthly invoice and an accounting export. The full tier, towards 70,000 EUR excl. VAT, adds multi-site, purchasing approval, SEPA and real-time ERP integration.
Custom, SaaS module or billing tool: what the options cost
| Option | Upfront cost | Annual cost | B2B limits |
|---|---|---|---|
| Subscription app on an existing store | 5,000 to 12,000 EUR | 3,000 to 6,000 EUR | No multi-site or purchasing approval |
| Recurring billing tool (Chargebee, Stripe Billing) | 10,000 to 20,000 EUR integration | 6,000 to 15,000 EUR | Handles invoicing, not logistics or adjustable carts |
| Custom B2B platform, essential | 30,000 EUR | 4,500 EUR maintenance and hosting | Multi-site as an option |
| Custom B2B platform, full | 70,000 EUR | 9,000 EUR maintenance and hosting | No notable functional limit |
| Time to launch | 1 to 2 months for an app | Not applicable | 3 to 5 months for custom |
The relevant calculation is not the cost of the tool but the secured recurring margin. A subscribed customer stays on average 2 to 3 times longer than an on-demand customer, because switching supplier takes effort.
How to manage the rollout
Start with the 200 most regular customers, those already ordering monthly by email. Offer to convert their last order into a subscription, with a 3% discount and free delivery from 150 EUR. Track three indicators every month: subscription conversion rate, share of modified deliveries, and 90-day cancellation rate. A cancellation rate above 8% usually signals poorly calibrated starting quantities.
Mini case study
Julien, founder of an office and hygiene consumables supplier in Lille, serves 1,100 companies. His de facto recurring revenue, from customers who reorder every month, reaches 150,000 EUR per month at a 28% gross margin.
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He invests 52,000 EUR excl. VAT in a platform with multi-site, purchasing approval and consolidated invoicing, plus 700 EUR a month for maintenance and hosting. After 9 months, recurring revenue grows 30%, meaning 45,000 EUR of extra monthly sales and 12,600 EUR more gross margin. Net of the 700 EUR monthly cost, the gain is 11,900 EUR a month. Factoring in the gradual ramp-up over the first 9 months, the investment pays back in about 11 months.
FAQ
Is a Shopify or WooCommerce subscription app enough?
For single-site customers paying by card, yes, for 5,000 to 12,000 EUR excl. VAT. As soon as customers have several sites, a purchasing department or pay by transfer at 30 days, the app hits its limits.
How do we handle customers who want to change their order?
The platform allows changes until D-3 before delivery, with an email reminder at D-5. Among equipped suppliers, 40 to 60% of deliveries are adjusted at least once per quarter.
Is the consolidated monthly invoice compliant with e-invoicing?
Yes, provided it is issued in a structured format (Factur-X) through an approved platform. In France, the obligation to receive e-invoices applies to all companies since September 2026, and issuing becomes mandatory for SMEs in September 2027.
What timeline for 1,100 customers?
Allow 3 to 5 months of development, then 2 to 3 months of gradual customer migration in waves of 200.
Should we offer a subscription discount?
A 2 to 5% discount is usually enough, combined with free delivery above a threshold. Beyond 5%, the margin impact often outweighs the loyalty gain.
Let's scope your project. Tell us your number of customers, delivery frequencies and ERP: we will price a B2B subscription platform between 30,000 and 70,000 EUR excl. VAT, delivered in 3 to 5 months. 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.
