Invoicing ·
How to Invoice as a Sole Trader in the UK (2026 Guide)
How to invoice as a UK sole trader: what to include with or without VAT, numbering, payment terms, late payment interest, records and a worked GBP example.
11 min read
Who it's for / Interpreters
Interpreters usually bill by the hour with a minimum per assignment, often two hours, or a half-day or full-day rate for conferences and depositions, with travel time, mileage or parking on top and a fee when an assignment is cancelled late. Remote work by video or phone can be billed by the minute. Agencies and hospitals often want one invoice a month listing every assignment with its date and job number, while direct clients are invoiced job by job. Tell Clodou what you did and at what rate: it writes the invoice and keeps track of who has paid.
Log each assignment on the agency's project with its job number, at your hourly rate. At month end, invoicing the unbilled time writes one draft invoice with one line per assignment and its date, and marks them billed.
"Log 2 hours for job 48213 today, my 2-hour minimum" bills the hours you give, and a late cancellation is a line at the amount your terms state. Clodou never applies a minimum or a fee by itself.
Give travel time, mileage and parking as their own lines at the rates you agreed, such as 46 miles at $0.70. Log parking and transit receipts as expenses from a photo you confirm.
Community, medical and business interpreting is often billed by the hour with a minimum per assignment, often two hours, then in steps such as half hours; conferences and depositions are often billed by the half day or the full day. Give Clodou the hours you bill or the day rate, such as full day, $650; it does not round time or apply your minimum by itself. Courts and some agencies set their own rates: use their rate and put their reference number in the line.
Travel time, mileage and parking are usually billed on top for on-site work, and late cancellations, often within 24 or 48 hours, are charged under your terms, sometimes for the full minimum. Evening, weekend or same-day assignments may carry a higher rate. Give each its own line at the amount you agreed, and write your cancellation terms in the note.
Agencies, hospitals and schools often want one invoice a month with each assignment, its date, its job number and the hours. Create a project for the client with your rate and log each assignment as you go, with the job number in the description; invoicing the unbilled time turns them into one draft invoice, one line per assignment with its date.
Step 1
Create a project, Bayview Language Services, for Bayview at $70 an hour. Log 2 hours for job 48213 at St. Mary's on October 6, my 2-hour minimum, and 3.5 hours for job 48390 at Lakeside Clinic on October 21.
Finds Bayview Language Services, creates the project at $70 an hour and logs two billable entries: job 48213, St. Mary's, 2 hours on October 6; job 48390, Lakeside Clinic, 3.5 hours on October 21.
Step 2
It's November 1: invoice Bayview for October's unbilled time.
Creates draft invoice INV-0088 with one line per entry and its date: job 48213, St. Mary's, 2 h at $70, $140.00; job 48390, Lakeside Clinic, 3.5 h at $70, $245.00. No tax is set on this workspace, so the total is $385.00, and the hours are marked billed.
Step 3
Invoice Grant & Lowe LLP for the deposition on November 4: full day at $650, 46 miles at $0.70 and $18 parking.
Finds Grant & Lowe LLP and creates draft invoice INV-0089 with three lines: interpreting, deposition, November 4, full day, $650.00; mileage, 46 miles at $0.70, $32.20; parking, $18.00. Total: $700.20.
Step 4
Lakeside cancelled tomorrow's job 48455 this morning. Under my terms that's the 2-hour minimum: invoice Bayview $140 for it.
Creates draft invoice INV-0090 for Bayview Language Services with one line: late cancellation, job 48455, 2-hour minimum, 2 hours at $70, $140.00.
Log 2 hours on the Bayview Language Services project today for job 48213 at St. Mary's, my 2-hour minimum
Invoice Bayview Language Services for October's unbilled time
Invoice Grant & Lowe LLP for the deposition on November 4: full day at $650, 46 miles at $0.70 and $18 parking
Invoicing ·
How to invoice as a UK sole trader: what to include with or without VAT, numbering, payment terms, late payment interest, records and a worked GBP example.
11 min read
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