Choose ad-running hours around your customers

Your opening hours are a useful starting point for an ad schedule, but they are not automatically your customers’ best buying hours. A person booking an appointment may act during lunch. Someone researching business software may do it after work. An online shop can take an order while its owner is asleep.

The useful question is what happens after the click. If a customer needs a person to respond, advertising while nobody is available can create enquiries you handle too late. If checkout or booking works independently, an evening visit may still be valuable.

Map the action you want a customer to take

Write down the next step your campaign asks for and who needs to be available to complete it. For a call-focused service, that could be a staffed phone line. For a sales enquiry, it could be a team able to reply promptly. For a self-service purchase, it may be the website alone.

Then compare three sets of hours: when customers are likely to act, when your team can respond, and when your service is actually available. The overlap gives you a practical first schedule. It also reveals operational problems that changing an ad schedule cannot solve, such as a booking form that sends enquiries to an unmonitored inbox.

Start with a clear hypothesis

A useful hypothesis names the problem and the result you expect. For example: “Weeknight enquiries wait until morning, and fewer become appointments. We will test running this campaign only while reception is staffed.”

That is specific enough to evaluate. “Night traffic is wasted” assumes an answer before looking at the data. Some customers may leave a form at night and convert later, so count those outcomes before excluding them.

For business customers, begin with their working week and timezone, not your own. Keep a separate hypothesis for different markets when their buying habits or response coverage differ.

Pick a schedule you can explain

A small service team might begin with Monday through Friday, 09:00 to 17:00. A business with late opening on Thursday might use a second run window that day. These are examples of matching a schedule to operations, not universal recommendations for performance.

Keep the first test simple enough that another team member can understand it. Record the campaigns, timezone, days, and hours, plus the reason for the change. In Campaign Hours, check the weekly preview and the upcoming actions before enabling the schedule.

If you need the setup steps, use our guide to scheduling ChatGPT ads by the hour.

Measure customer outcomes alongside spend

Choose the primary result before you start: qualified enquiries, booked appointments, purchases, or another outcome relevant to the campaign. Track spend and the cost per result, but also record total result volume. Lower spend is not an improvement if it removes more profitable business than it saves.

Where your reporting supports it, compare the time an enquiry arrived with the eventual outcome and response time. Your own booking system or customer records may provide context that an advertising report does not. Keep definitions consistent, particularly what counts as a qualified lead.

Compare periods with similar weekdays and enough completed outcomes to be useful. Avoid changing creative, targeting, budget, and hours together if you want to understand the scheduling change. If a promotion or staffing change overlaps the test, record it rather than attributing the entire difference to timing.

Fewer eligible hours do not equal a savings percentage

A weekday schedule from 09:00 to 17:00 includes 40 hours of a 168-hour week. That calculation describes the schedule. It does not prove a corresponding percentage reduction in spend, because delivery is not necessarily evenly distributed across hours.

OpenAI’s campaign documentation describes daily budgets as an average over a seven-day period and notes that delivery can vary. Do not assume that a shorter run window creates a proportional reduction in your bill. OpenAI campaign budget guidance.

Keep budget controls aligned with what you are willing to spend. Treat the schedule as control over requested campaign activity, then use actual spend and business results to assess its effect.

Review and adjust deliberately

If useful enquiries disappear, investigate which hours you removed and whether follow-up coverage could be improved instead. If the same quality of business arrives with less spend, keep testing that result across another comparable period.

Scheduling also has an operational benefit: a shared weekly rule is easier to inspect than relying on somebody to remember two manual actions each day. Review verified actions in Activity, and revisit the schedule when opening hours, staff coverage, or customer markets change.

Create a schedule using the hours you can support, with a clear plan for measuring what happens next.