Working Across Time Zones: A Freelancer's Billing Guide

Quick answer

Agree on a recurring overlap window, name one reference time zone in writing, and put an exact invoice date and due date on every invoice. That heads off most of the confusion that turns a time zone gap into a billing dispute. Here's how to do each step, with the sources behind them.

Agree on overlap hours before the first invoice

Freelance timezone overlap scheduling is mostly about replacing open-ended availability with a clear window. One travel-freelancer guide suggests politely turning down meetings outside your working hours and stating your hours instead, in the form "your available hours for meetings are X, Y and Z."

Offer windows, not "whenever"

A freelancer writing for Due suggests asking clients to hold calls at 4 or 5 p.m. their time, which lands at 8 or 9 a.m. for the author, early enough to be alert. The same author also says a client who will not compromise on regular meeting times may not be worth keeping. Wise suggests going further: block calendar time for each client based on their time zone and hold regular check-ins so nothing depends on ad hoc calls.

A short window you both keep beats a long one nobody respects. Wise cites research finding that a one-hour increase in time zone difference was linked to an 11% reduction in synchronous communication, so expect fewer live conversations as the gap grows. Plan for written updates in between.

Name one reference time zone

Pick one zone for the whole engagement and use it everywhere. The halfhalftravel guide recommends using 24-hour time with international clients and including the time zone in written proposals. It also suggests adding a secondary time zone in Google Calendar so a client's hours show next to yours.

Watch daylight saving

Countries change clocks on different dates, so the gap between you and a client can shift by an hour for part of the year. If a recurring call or a deadline is written as a clock time, recheck it when either side's clocks change.

Put the time zone and currency on the invoice

Dates that cannot be misread

Stripe's freelancer invoicing guide says to include both the invoice date and the payment due date, and to write an exact date rather than vague wording. When your client's Friday ends hours after yours, "due Friday" is not an exact date. Write the date. Then state the reference time zone in the contract, so "end of day" has one meaning.

Stripe also suggests starting new clients on shorter terms such as net 14, then adjusting once they have paid reliably. Give every invoice a unique number so both sides can point to the same document.

Currency and transfer fees

If your client is abroad, state the currency you are invoicing in and agree in advance who covers any transfer or conversion fees. For wire payments, include your IBAN and your BIC or SWIFT code. We cover the currency side in more depth in multi-currency invoicing.

Milestones when hours are hard to pin down

If your overlap is thin and most work happens while the client sleeps, consider tying payment to deliverables. Stripe describes milestone billing as payment tied to specific project stages, and suggests defining milestones by deliverables and outcomes rather than only by deadlines. A milestone is either delivered or it isn't, whichever side of the date line you sit on.

Log hours so the date is never in dispute

If you bill by the hour, a late session can fall on different calendar days for you and your client. Decide which zone defines the day, log against it, and keep start and stop times for every entry.

• Record time as you work, not from memory at the end of the week. Automatic time tracking can help, but check how accurate it is before you bill on it.
• Keep the raw entries. If a client questions a date or an hour, an evidence-first response starts from the log, not from an argument.
• Note the reference zone on the invoice next to the billing period, for example "1-31 October, UTC+1."

Protect your focus time outside the overlap

The overlap window is for calls. Everything else can be async. If clients are ahead of you, the Due author recommends finishing work at least a day before the due date, so it is waiting for them when they start their day. Use the hours outside the window for a deep work block instead of checking messages from the other side of the world.

Doing this with Pomlo

Pomlo is a time tracker for iOS, Android, and the web, and three features fit this problem. Projects and clients keep each client's hours separate, so a client in another zone has its own log. One-tap start and stop makes it easy to record time as you work rather than reconstruct it later. Built-in invoicing turns tracked hours into an invoice in one tap, and reports show where your week went. Your data isn't sold or used to train models.

Download Pomlo on the App Store or get it on Google Play.

Frequently Asked Questions

How many overlap hours do I need with a client?

There is no sourced magic number. Agree on a recurring window both sides can keep and move everything else to written updates. The research Wise cites links a larger time zone gap to less live conversation, so a short, reliable window beats a long, ad hoc one.

Which time zone should an invoice use?

Pick one reference time zone for the engagement, write it in the contract, and state the exact due date next to it. Stripe advises showing both the invoice date and an exact due date rather than vague wording.

Do daylight saving changes affect my billing?

They can shift the gap between you and a client by an hour for part of the year, because countries change clocks on different dates. Recheck recurring call times and any deadline written as a clock time.