How much timezone overlap do you actually need?

Timezone is the first thing people specify and the thing they most often get wrong — almost always by asking for more than the role needs.

Full overlap costs more, narrows the candidate pool, and asks someone to invert their life indefinitely. Sometimes that is exactly right. Frequently it is not.

Three arrangements

Arrangement	What it means	Genuinely needed for
Full overlap	Your assistant works your business day	Phone, live chat, anything reactive or constantly interrupted
Partial overlap	Two to four shared hours, rest asynchronous	Most administrative work, bookkeeping, e-commerce ops, content
Opposite shift	Work arrives finished when you wake up	Production work with a clear brief

The test that settles it

For each task in the role, ask one question: does someone have to respond to this while it is happening?

Yes — a customer waiting on chat, a phone ringing, a prospect who called back. These need overlap.

No — an invoice, a listing update, a reconciliation, a report, a document. These need a clear brief and a deadline. Overlap adds nothing.

Now count. If most of the role is in the second category, you do not need full coverage. You need a daily handover window and clear instructions.

What partial overlap actually looks like

From the UK: a Philippine working day ending around 5pm local lands at about 9 or 10am in London. You start your day with two to four shared hours and yesterday’s work already finished. For most UK support roles this is not a compromise — it is better than a same-hours arrangement, because a full day of work happens before you arrive.

From Australia and New Zealand: effectively the same working day. There is no overlap question here at all, which is why so much Australian outsourcing goes to the Philippines. See our Australia page.

From the US: this is where it gets real. Live coverage of a US working day means your assistant works through their night. Done widely, sustainable when it is chosen and properly paid — and a retention problem when a provider quietly puts a day-shift person on a night-shift account to win on price.

A common US compromise: your assistant starts at 6am Philippine time, which is 6pm US Eastern the previous day — giving an evening handover window without anyone working the small hours.

What over-specifying costs

Money. Night shift attracts a premium, and it should.

Candidate quality. Insisting on hours that suit you narrows the pool, and the strongest people have the most choice about which shift they accept.

Retention. Someone working nights for a role that did not need it will eventually take a day-shift job. Then you are hiring again, and the replacement cost dwarfs whatever the overlap was worth.

When you genuinely do need full coverage

Not an argument against it — just be sure:

• Inbound phone or live chat during your business hours
• Sales roles where speed to lead decides conversion
• Support with a response-time commitment
• Anything where a two-hour delay costs a customer

If your role is on this list, staff it properly and pay the premium. Half-staffing a real-time role is worse than not staffing it.

A practical way to decide

1. List the tasks. Not the job title — the actual tasks.
2. Mark each one live or asynchronous using the test above.
3. Add up the live hours. That is your overlap requirement.
4. Ask whether those live hours cluster in a particular part of your day. Usually they do, and you need coverage for that window rather than the whole day.
5. Specify the window, not the shift.

Most people who run this honestly find they need two to four hours, not nine.

Frequently asked questions

Can my assistant change shift later?

Sometimes, but treat it as a significant change rather than an adjustment. Someone who took a day-shift role may not want a night one, and asking can cost you the person.

Is a night shift bad for the person?

It is a real thing to ask of someone and should be chosen and paid for, not assumed. The Philippines has a mature night-shift sector where people opt into it deliberately — the problem is not night work, it is unacknowledged night work.

What about a split shift?

Possible and usually a bad idea. Broken days are harder to sustain than a straight shift in either direction.

Would Latin America suit US hours better?

For genuinely all-day real-time roles, often yes, and we say so in our regional comparison. For most support work the Philippines is stronger on English, cost and sector depth.

How do I handle handovers across a gap?

A short written summary at the end of their day: what got done, what is blocked, what needs a decision. Ten minutes, and it removes most of the friction people attribute to timezone.