How quickly should a field service business invoice?

Same day, ideally before the engineer leaves the driveway. Invoices raised on site are paid roughly twice as fast as ones sent at the end of the week, because the work is still fresh in the customer's mind.

Can Tryoup take card payment on site?

Yes. The invoice carries a payment link the customer can pay on their own phone, and payment is reconciled back against the job automatically.

Does this work with Xero and QuickBooks?

Yes. Invoices, credit notes and payments sync across, so your bookkeeper works from the same numbers without re-keying anything.

ROI & Savings28 May 2026

Stop Chasing Money: What Late Invoicing Is Costing Your Business

Invoicing and payments for a field service business

The day the job is finished is the day the customer most wants to pay. Wait a week and you're now competing for attention with their other bills. Wait two and you're chasing.

The hidden cost today

Office time typing up job sheets into invoices.
Cash sat in unbilled work for a week before it leaves the office.
Hours per week chasing 30, 60, 90-day debtors.
Bank facility or overdraft costs to cover the gap.

What Tryoup changes

Engineers complete the job on the mobile app, the customer signs, and the invoice and payment link go out automatically — same day, often before the van has left the drive. Card, bank transfer or saved payment method, all reconciled back to the job.

A worked example

£40,000/month billing.
Days Sales Outstanding drops from 35 days to 12 days.
Working capital freed: ~£30,000 permanently back in the bank.
2 hours/week of admin saved on chasing × £20/hr × 48 weeks = £1,920/year.

A simple formula

Cash freed ≈ monthly billing ÷ 30 × DSO reduction (days)

Where the delay actually comes from

Very few businesses set out to invoice late. The delay creeps in between the engineer finishing the job and the office having enough information to bill it: a paper job sheet in a van, parts that were not recorded, a price that needs checking with the owner. Every one of those handovers adds a day, and the days compound across every job in the week.

Invoice at the door instead

The engineer closes the job in the app with photos, parts used and time on site.
Tryoup prices it from your rate card, so nobody has to remember the labour rate.
The customer signs on the phone and the invoice is emailed before the van pulls away.
A payment link sits at the top of the invoice, so card payment takes seconds.

What it does to your cash position

Cutting the invoice lag from nine days to same-day does not just speed up payment — it pulls roughly a week and a half of revenue permanently forward in your bank account. For a business turning over GBP 500,000 a year, that is around GBP 19,000 of working capital you stop lending to your customers for free, plus fewer overdraft days and less time on the phone chasing.

Automated reminders at 7, 14 and 21 days handle the chasing that remains, and they go out whether or not anyone in the office has time that week.

Frequently asked questions

How quickly should a field service business invoice?: Same day, ideally before the engineer leaves the driveway. Invoices raised on site are paid roughly twice as fast as ones sent at the end of the week, because the work is still fresh in the customer's mind.
Can Tryoup take card payment on site?: Yes. The invoice carries a payment link the customer can pay on their own phone, and payment is reconciled back against the job automatically.
Does this work with Xero and QuickBooks?: Yes. Invoices, credit notes and payments sync across, so your bookkeeper works from the same numbers without re-keying anything.