Why "24/7 coverage" is the wrong thing to ask for
Every outsourcing vendor will tell you their team works around the clock. That's true and also not the point — a tester who's awake at 3am your time is only useful if there's a live window for a question to get asked and answered the same day. Time-zone-management guidance converges on a smaller, more useful number: a 2–4 hour live overlap, protected for standups and real-time problem-solving, with everything outside it handled through written updates, recorded handoffs, and clear response-time expectations rather than left informal.
The reverse framing is where the value actually sits: a time-zone gap, handled deliberately, becomes a follow-the-sun handoff rather than a dead zone — QA runs while your team sleeps, and you come back online to triaged, already-tested work instead of a queue. That only works, though, once you know your actual offset.
See QASource's guide to managing offshore QA teams and Brainhub's analysis of coping with time-zone differences in offshoring for the overlap-window guidance referenced above.
The actual math: India Standard Time against UK, Australian, and APAC hours
India Standard Time (IST) doesn't observe daylight saving, so it's a fixed point — UTC+5:30, every day of the year. The buyer-side time zones move with the seasons, which is exactly where "we offer time-zone overlap" marketing copy tends to get vague. Here's the actual arithmetic:
| Market | Local zone | Offset vs. IST | What that means day to day |
|---|---|---|---|
| UK | GMT / BST | 4.5–5.5 hrs behind | Standard IST hours already cover a full UK working day — no shift needed |
| Singapore / Malaysia / Philippines | UTC+8 | 2.5 hrs ahead | Smallest adjustment of any market here — near-complete natural overlap |
| Japan / South Korea | UTC+9 | 3.5 hrs ahead | Most of the IST day still overlaps; a slightly earlier IST start closes the gap |
| Australia (Sydney/Melbourne) | AEST / AEDT | 4.5–5.5 hrs ahead | Needs a deliberately shifted IST block to land live overlap with local business hours |
Australia runs AEDT (UTC+11) during daylight saving, roughly October–April, and AEST (UTC+10) the rest of the year — see Second Talent's Asia–Europe overlap-hours guide for how these offsets are typically scheduled against for remote teams. UK/Europe figures match the offset already published on our UK & Europe region page.
Two scheduling models, not one default
The table above splits into two genuinely different scheduling problems, and a vendor that treats them identically is the first warning sign:
- Natural-overlap markets (UK, Singapore, Malaysia, Philippines, and most of APAC). The offset is small enough that a standard India working day already lines up with a standard local working day, end to end. Nothing needs to be negotiated around a large gap — this is the model we run for UK & Europe engagements.
- Shifted-block markets (Australia, and the same pattern used for US engagements). The offset is large enough that a default 9-to-6 IST day mostly misses the local business day. The fix is a deliberately earlier (or later) IST working block, agreed at kickoff as part of the SOW — not a fixed default that happens to suit one market and gets improvised for the next.
What to ask before you sign
Three questions cut through most of the vagueness in a QA-outsourcing pitch:
- What's the exact scheduled overlap window, in your time zone, in writing? "We cover your hours" isn't an answer; a start and end time is.
- What happens to a defect found outside that window? A good answer names a specific async path — written handoff, recorded walkthrough, a defined response-time SLA — not "we'll get to it."
- Is the overlap a fixed default, or set per engagement? A vendor running the same block for a UK client and an Australian client either hasn't noticed the offset is different, or hasn't bothered to adjust for it.
QAInfinity schedules the working block — natural-overlap or shifted — as part of kickoff for every engagement, matched to the actual market, not a fixed default that happens to work for one coast or one country.