The verdict in three sentences
A trade business waiting an average of 12 days for a 30% deposit ties up significant cash and delays material orders. Building e-signature and online payment (card or instant bank transfer) directly into the quote cuts that delay to 1 to 3 days for most customers. With fees of 0.8 to 1.8% per transaction, the cash flow gain and fewer chasers more than cover the cost in year one.
Why deposits arrive so late
The owner of a 15-person energy retrofit contractor (insulation, heat pumps, windows) signs about 600 quotes a year, averaging 14,000 EUR including tax. The 30% deposit is therefore 4,200 EUR per job. The current flow is slow: quote sent as a PDF by email, printed, signed by hand, scanned or photographed, emailed back, then a deposit invoice is issued and the business waits for the bank transfer.
| Step | Current average delay | With quote signed and paid online |
|---|---|---|
| Quote sent to customer | D0 | D0 |
| Customer signature | D+5 (print, scan) | D+1 to D+2 (e-signature) |
| Deposit invoice issued | D+6 | Automatic at signature |
| Payment received | D+12 | D+1 to D+3 (card or instant transfer) |
| Phone chasers per job | 1.5 | 0.3 |
| Signed quotes never paid | 6% | 2% |
These are 2026 estimates observed in small trade businesses. The main gain comes from removing paper steps and taking payment at the moment the customer is most committed, right after signing.
Payment methods and fees in 2026
| Payment method | Typical fees | Settlement time | Best use |
|---|---|---|---|
| Card (payment provider) | 1.2 to 1.8% + 0.25 EUR | D+2 to D+3 | Deposits up to 3,000 EUR |
| Instant bank payment via open banking | 0.8 to 1.2% or flat fee | Seconds | Larger deposits, 3,000 to 15,000 EUR |
| Standard transfer with QR code or bank details | 0 EUR | D+1 to D+3 after issue | Customers wary of online payment |
| Direct debit | 0.5 to 1% | About D+5 | Payment schedules |
| Cheque | 0 EUR but handling cost | D+7 to D+10 | Discourage |
On an average 4,200 EUR deposit, card payment costs about 60 EUR and an open banking instant payment around 40 EUR. Many businesses offer both, putting the instant transfer first. In the UK, Faster Payments and open banking providers work the same way; in the US, ACH and card payments play these roles with comparable fee levels. Some public retrofit grant schemes set rules on deposits, so check each scheme before fixing your rate.
Building payment into your quoting tool
There are three options. If your trade quoting software already offers e-signature and payment, activation usually adds 20 to 80 EUR a month. If it does not, integrating a payment provider and an e-signature service typically costs 2,000 to 6,000 EUR through an integrator. Finally, if you want a real customer portal (job tracking, photos, payment schedule, final invoice), a custom application is the way. Kolonell grid: simple app 2,500,000 to 4,000,000 FCFA (3,810 to 6,100 EUR), medium app 4,000,000 to 7,000,000 FCFA (6,100 to 10,670 EUR), with maintenance at 35,000 or 75,000 FCFA a month (53 or 114 EUR).
Technical points not to overlook: e-signature compliant with eIDAS in Europe or the ESIGN Act in the US, timestamping of the signed quote, automatic deposit invoice with sequential numbering, automatic bank reconciliation and a notification to the team to trigger the materials order.
Mini case study
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Tom, owner of a 15-person energy retrofit contractor, collects 600 deposits of 4,200 EUR a year, 2,520,000 EUR in total. Cutting the average delay from 12 to 3 days gains 9 days of cash: 2,520,000 x 9 / 365 = about 62,100 EUR less working capital needed, permanently. Fees: 60% of customers pay by instant transfer (360 x 40 EUR = 14,400 EUR) and 40% by card (240 x 60 EUR = 14,400 EUR), 28,800 EUR a year. On the other side, reducing signed-but-unpaid quotes from 6% to 2% saves 24 jobs, 24 x 14,000 EUR = 336,000 EUR of revenue, and chasers drop from 900 to 180 calls a year. Tom can also offer a fee-free standard transfer to limit costs.
FAQ
Can a customer pay a 5,000 EUR deposit by card?
Yes, but customer card limits often cap payments at 3,000 to 5,000 EUR over 7 days. An open banking instant payment avoids this and often costs under 1%.
Is an e-signature as valid as a handwritten one?
For a quote, a simple e-signature compliant with eIDAS or the ESIGN Act is enough in the vast majority of cases. It costs 0.50 to 2 EUR per signature depending on the provider.
Who pays the transaction fees?
The business, as a rule. At 0.8 to 1.8%, they amount to 40 to 75 EUR on a 4,200 EUR deposit, often less than an hour of admin chasing.
How long does setup take?
Activating a module in existing software takes a few days. A custom integration with a customer portal takes 6 to 12 weeks.
What if a customer disputes a card payment?
The signed, timestamped quote serves as evidence with the payment provider. Disputes remain rare, under 0.2% of transactions in the trades.
Let's scope your project. We define with you how e-signature and deposit payment fit into your quoting flow, with go-live in 6 to 12 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.
