Quick Answer: How Do Installation Businesses Take Payments in 2026?
Two tools, one workflow. Voice Checkout for the deposit on the closing call. Payment links for every stage payment and the final balance. That combination fits solar PV, heat pump, retrofit, HVAC, EV charger, window, door, roofing, and insulation installers.
The workflow looks like this:
- Site survey: surveyor or estimator visits, scopes the job, quotes.
- Closing call: sales rep follows up by phone. Customer agrees. Deposit taken on the call via Voice Checkout: customer enters card on the keypad, rep stays on the line, deal is locked in.
- Pre-installation: payment link for the next stage payment (varies by trade and grant structure). Customer pays from their phone.
- Installation: work happens. Stage payments via link if multi-day.
- Commissioning and final balance: final payment link for the balance, with any grant deduction (SEAI, BUS, ECO4) handled in the calculation.
The rest of this guide explains why this works better than card machines, why the deposit must come on the closing call rather than days later, and how grant-funded installers handle the final balance cleanly.
The Problem: Installation Sales Are Closed on the Phone, but Payment Lives on a Different Calendar
Installation businesses run a sales-led process. A homeowner enquires about solar panels, a heat pump, new windows, a retrofit, an EV charger. The first step is a site survey. The second is a quote. The third is a closing call: your sales rep walks the customer through the proposal, answers objections, and asks for the agreement.
That moment, when the customer says yes, is the most valuable moment in the entire sales cycle. It's also the moment many installation businesses fail to capture financially. The rep says "great, we'll send you the contract and an invoice for the deposit". The contract goes out. The invoice goes out. Then the wait begins.
Three days pass. The customer hasn't paid the deposit yet. They're not having second thoughts. They're just busy. Your office sends a reminder. A week passes. Now the customer has had time to look at competitor quotes, talk to a neighbour, find a cheaper option. The deposit eventually lands. Or it doesn't, and the lead is dead.
Multiply that across every quote your sales team closes. The gap between "yes" on the phone and the deposit hitting the bank is where pipeline leaks. The longer the gap, the higher the leak rate.
The fix is simple in principle: take the deposit during the closing call itself. Card details, customer agreement, deposit confirmed, all in the same conversation. The catch is that PCI compliance makes this harder than it sounds. If your rep types the customer's card number into a CRM during the call, you've created a compliance liability. If they write it down, worse. The traditional answer was "send them a payment link to fill in later", which puts the wait back into the workflow.
Voice Checkout solves the gap. It's the same conversation, the same call, but the customer enters their card on the phone keypad, and the digits never reach your rep, the call recording, or your CRM. The deposit is confirmed and the deal locked in before the call ends. Voice Checkout works with Twilio today, and any carrier coming soon.
How the Two-Tool Stack Works for Each Stage
The Deposit: Voice Checkout on the Closing Call
The closing call is a high-conversion moment in the installer sales cycle. Your sales rep has built rapport during the survey and the proposal walk-through, the customer is committed to the decision, and the friction to act is at its lowest. Asking for the deposit during the same call captures that commitment immediately.
Voice Checkout handles the mechanics. When the customer says yes, the rep transfers them (or steps them) into a secure payment flow. The customer enters their card number, expiry, and CVV on the phone keypad. The digits never reach the rep, the recording, or your CRM. The payment is processed by the PSP, the rep sees the result, and the call continues: booking the install date, confirming the address, walking through what happens next.
For installation businesses with grant-funded products (SEAI One Stop Shops, BUS-registered heat pump installers, ECO4 retrofit operators), a signed contract plus a paid deposit is far stronger evidence of intent than a contract alone.
Pre-Installation and Stage Payments: Payment Links
For installations that span multiple days or require staged payments, payment links handle the middle of the workflow. A heat pump installation might break into a deposit, a pre-installation balance (when parts are ordered), a payment on first fix, and a final balance on commissioning. A solar PV installation is typically simpler (deposit, then balance), but commercial solar can run to several stages.
Each stage is its own payment link with its own description. The customer receives the link by SMS or email, opens a branded checkout page, enters their card, pays. Your office sees the payment confirmed in real time, with a clear timestamp and a description that ties to the customer file.
For multi-day jobs, sending the link as soon as a stage is complete catches the customer at maximum satisfaction. They've just seen the work, the team is still on site or just left, and paying feels like the natural close. Sending the link days later, after the team has left and other priorities have taken over, is where late payments come from.
The Final Balance: Payment Links with Grant Deductions Handled
The final balance is where grant-funded installations get specific. The customer's "balance due" is not the headline contract value. It's the contract value minus the grant deduction. For SEAI One Stop Shops in Ireland, that's the SEAI grant amount netted off. For BUS-registered installers in the UK, it's the £7,500 boiler-upgrade-scheme grant netted off the heat pump value. For ECO4 retrofit, it's the funding contribution netted off the works value.
The mechanics are the same as any other payment link, but the description should be unambiguous: "Final balance after SEAI grant deduction: solar PV installation, [address]" or "Final balance after BUS grant: air source heat pump, [address]". This protects you if the customer queries the figure later, and it gives the homeowner a clean record for their own files.
Why This Workflow Beats Card Machines and Bank Transfer for Installers
Card machines are common in trades where the technician is the one collecting payment: plumbing callouts, electrical fault-finding, appliance repair. Installation is different. The person closing the deal (the sales rep on the phone) is not the same person doing the work (the engineer on site). And the deposit moment, when the customer says yes, happens before any technician shows up.
That mismatch makes card machines the wrong tool for installation. You can't take a deposit on a card machine during a phone call. You'd have to wait until the engineer was on site weeks later, by which point the deposit has either been transferred (slowly) or the lead has gone cold.
Bank transfer suffers the same problem in a different shape. It works fine in theory: send the bank details by email, customer transfers the deposit. In practice, every step is friction. The customer has to log into their banking app, set you up as a new payee, type in the sort code and account number correctly, choose a reference, confirm the payment. For a £2,500 deposit on a heat pump, the customer's bank may flag the new payee for a 24-hour security check before releasing the funds. By the time the deposit lands, the customer has had 48 hours to second-guess the decision.
Voice Checkout plus payment links removes both delays. The deposit is paid during the call. The stage payments can be paid the moment they're sent. There's less room for second thoughts, competitor quotes, or admin slippage.
Which Installation Businesses This Workflow Fits
The deposit-on-call + balance-by-link pattern fits any installation business that closes on the phone. That covers a wide range of home installation businesses:
- Solar PV installers: domestic and commercial. Deposit on the closing call, balance on commissioning. Grant-deduction handling for any local incentives.
- Heat pump installers: air source and ground source. Deposit, pre-installation, final balance with BUS or SEAI grant netting.
- Retrofit and energy upgrade one-stop shops: SEAI One Stop Shops in Ireland, ECO4-registered installers in the UK. Multiple stage payments depending on works mix (insulation, ventilation, heat pump, solar PV, EV charger).
- HVAC installers: heating and ventilation. Deposit on agreement, balance on completion.
- Window and door installers: high-ticket residential. Deposit when the survey is signed off, balance on installation day.
- EV charger installers: domestic and commercial. Deposit on the closing call, balance after commissioning.
- Roofing contractors: full re-roofs and major repairs. Deposit, materials payment, final balance.
- Insulation installers: cavity wall, loft, external wall. Often grant-funded, with the same workflow and grant netting on the final balance.
The common thread: a sales-led process, a phone-based closing call, and a job big enough that the deposit matters. If those three apply to your business, the deposit-on-call + balance-by-link pattern is a better fit than card machines and bank transfers.
What to Look For in a Payment Provider for Installation Businesses
Not every payment provider supports the full workflow. Here's what matters when you're evaluating options.
- Voice Checkout (secure keypad capture) for phone-based deposits. The provider must support keypad-entered card capture during a live call, where the digits never reach your team. That is what keeps your PCI scope limited. If the provider only offers payment links, you're back to the gap problem.
- Payment links with custom descriptions and amounts. Every stage payment needs a clear description. A provider that only offers fixed-amount or generic links won't fit installation work.
- High transaction limits. Installation values commonly run from £3,000 to £25,000+. Make sure individual transaction limits are well above your typical job value.
- Real-time payment dashboard. Your office needs to see the status of every deposit, stage payment, and final balance across all live jobs. Daily reconciliation against the customer file should take minutes, not hours.
- Grant-friendly description fields. "Final balance after SEAI grant deduction" needs to fit cleanly in the payment description. Some providers truncate descriptions, so verify yours doesn't.
- API or CRM integration. If your sales team works in a CRM or your ops team uses a job management tool (ServiceM8, Jobber, simPRO, ServiceTitan), payment links and voice checkout sessions should integrate so payments are logged against the customer record automatically.
For most installation businesses, the right combination is a provider that supports both Voice Checkout and payment links from a single account, with one dashboard across both. That keeps the deposit, stage payments, and final balance all in one place.