The verdict in three sentences
For a services SME in Dublin, adding payment links and SEPA Direct Debit to invoices costs EUR 3,000 to 10,000 excluding VAT to integrate, plus EUR 0.35 to 0.80 per debit. The realistic goal is to move from 62 to 38 days sales outstanding, which frees about EUR 180,000 of cash on EUR 2.7 million of revenue. The choice between link, direct debit and bank transfer depends on how recurring your invoices are, not on fashion.
The three levers and their real cost in 2026
A B2B invoice paid by manual transfer waits for the customer to key it into their system, get it approved and then release payment. Each step adds days. Three levers remove them.
- Invoice payment link: a "Pay" button in the PDF and the email, opening a page for card, instant transfer or one-off debit.
- SEPA Direct Debit Core or B2B: the customer signs a mandate once and you collect on each due date. Ideal for recurring contracts (maintenance, subscriptions, monthly retainers).
- Automated reminders: D-3, D+1, D+8, D+15, with the payment link each time and escalation to the account manager.
| Payment method | Fee per transaction 2026 | Time to cash | Return or dispute risk |
|---|---|---|---|
| Manual bank transfer | EUR 0 | 30 to 60 days after due date | Frequent delays |
| SEPA Instant transfer (link) | EUR 0.20 to 0.50 | Immediate | Very low |
| SEPA Direct Debit Core | EUR 0.35 to 0.80 | D+2 business days | Refund possible for 8 weeks |
| SEPA Direct Debit B2B | EUR 0.50 to 1.20 | D+2 business days | No refund after debit |
| Card (link) | 1.2 to 2.5 % | D+1 to D+3 | Chargebacks possible |
| Open banking (payment initiation) | 0.30 to 1 % | Immediate to D+1 | Very low |
On an average invoice of EUR 4,500, a card can cost up to EUR 112, a SEPA debit under EUR 1. The payment link should therefore offer instant transfer or debit first and card last.
Integration budget by invoicing tool
| Setup | Integration excl. VAT | Monthly fee | Lead time |
|---|---|---|---|
| SaaS invoicing with native module (Xero, Sage Accounting) | EUR 3,000 | EUR 50 to 150 | 2 to 3 weeks |
| Existing ERP + PSP (GoCardless, Stripe, Mollie) | EUR 5,000 to 7,000 | EUR 0 to 100 + fees | 4 to 6 weeks |
| Custom customer portal (invoices, mandates, history) | EUR 8,000 to 10,000 | EUR 100 to 250 hosting | 6 to 8 weeks |
| Multichannel reminders option (email, SMS) | +EUR 1,500 | EUR 30 to 80 | +1 week |
| Automatic bank reconciliation option | +EUR 2,000 | included | +1 week |
Keep e-invoicing in mind: the EU ViDA package is pushing structured electronic invoices, and Ireland is phasing in mandatory B2B e-invoicing over the coming years. Choose a payment solution that can report the "paid" status back to your e-invoicing provider to avoid a second integration later.
Mini case study
Aoife, finance director of an IT services firm in Dublin (EUR 2.7 million revenue, 140 customers, 60 % recurring contracts), runs at 62 days sales outstanding. She invests EUR 7,500 in a portal with SEPA B2B debit for recurring contracts and payment links for one-off work.
- Target DSO: 38 days, 24 days gained. Cash freed: 2,700,000 × 24 / 365, about EUR 177,000.
- Financing saved: at 5 % on a short-term credit line, about EUR 8,900 a year.
- Chasing time: 2 days a month of the accounts assistant recovered, about EUR 6,000 a year.
- Debit fees: 85 contracts × 12 × EUR 0.90, about EUR 920 a year.
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Estimated net annual gain: around EUR 14,000, on top of the safety of EUR 177,000 of available cash. Payback in about 7 months.
FAQ
How much does SEPA Direct Debit cost to set up for an SME?
Between EUR 3,000 and 7,000 of integration depending on your invoicing tool, then EUR 0.35 to 0.80 per Core debit or up to EUR 1.20 for B2B. Mandate collection can be fully electronic.
SEPA Core or B2B: which one?
B2B rules out refunds after debit, which secures your cash, but the customer must register the mandate with their bank. Core is easier to get signed but can be refunded for 8 weeks.
Do customers actually pay through links?
As a rough estimate, 35 to 50 % of one-off invoices are paid via the link within 10 days of sending. The rate rises when the link offers instant transfer at no cost to the payer.
What late payment rules apply in Ireland?
The Late Payment in Commercial Transactions Regulations set a default of 30 days and a maximum of 60 days unless agreed otherwise. Beyond that, statutory interest and fixed compensation of EUR 40 to 100 can be claimed, and your reminders can say so.
Is it compatible with upcoming e-invoicing rules?
Yes, provided your e-invoicing provider receives the "paid" status. Most PSPs expose it by API, which takes 1 to 2 days of development.
Let's scope your project. Tell us your invoice volume, invoicing tool and current DSO and we will price an integration between EUR 3,000 and 10,000, live in 2 to 8 weeks. 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.
