Best time to post on Instagram: what it means, what the public studies found and figures

Buffer's analysis of 9.6 million Instagram posts, published September 23, 2026, put the best times to post on Instagram at Thursday at 9 a.m., Wednesday at 12 p.m. and Wednesday at 6 p.m., read as local time.¹ That is only a starting point. The best hour for any single account is when its own followers are online and engaging, and the public studies disagree with each other.

Data sources

Key points

• Buffer studied 9.6 million Instagram posts published from January 2024 to December 2025. It found Wednesday to be the best day, Friday and Saturday the worst, and 1 a.m. to 5 a.m. the weakest hours on any day.
• Hootsuite and Critical Truth analyzed over 1 million social posts across 118 countries and named Monday, Tuesday and Thursday as the days with the most reach.
• Sprout Social, working from nearly 2 billion engagements, recommends Tuesday 1–7 p.m. and Wednesday 12–9 p.m., and ranks Sunday as the weakest day on every major network.
• Metricool gives 10:00 and Friday but does not publish a sample size.
• The studies disagree on the best day. The follower activity data in Instagram Insights, available on professional accounts, is the only one that describes your audience.

What "best time to post" actually measures

Each company defines "best" with its own yardstick. Buffer uses median engagement rate: likes, comments, shares and saves, divided by followers, times 100.¹

That formula belongs to Buffer. Instagram did not set it.

Hootsuite frames its best days in terms of reach, while Sprout Social works from engagement counts. So a "best hour" in one table and a "best hour" in another are not always the same thing. None of the sources cited here is Instagram documentation.

Buffer also did not split its numbers by format. All post types were analyzed together, so its table says nothing specific about any single format.¹

What the public studies found

Four public studies show up again and again in searches for posting times. Their samples differ a lot in size, and one publishes no sample at all.

Instagram made up only part of Buffer's full dataset: about 18.5% at most, since Buffer describes the total as more than 52 million posts. Sprout's base covers several networks, and the Instagram share is not broken out in the figures used here.⁴

Buffer's table, day by day

Buffer lists a top hour plus two runners-up for every day of the week.¹

In Buffer's data, evening hours (6 p.m. to 11 p.m.) beat mornings on every day except Thursday, the only weekday where the 7 a.m. to 9 a.m. window wins. No cause for that pattern appears in the figures used here.

Where the studies disagree

Friday is the clearest split (and nobody reconciles it). Buffer lists Friday among the two worst days, while Metricool calls it the day that usually performs best.^{1, 5} Hootsuite simply puts Friday's best slot around 4 p.m.

Late night is another split. Buffer's top Friday hour is 10 p.m., right at the line Hootsuite draws for late nights (after 10 p.m.), which it counts among the least effective times.³ Wednesday comes close to agreement: Buffer and Sprout Social both rank it high, but it is missing from Hootsuite's three best days for reach.

So which table should a small business use? None of them, on its own. The studies differ in sample, period and metric, and none of them was built from a single account's followers.

Hootsuite says as much: the best time depends on industry, audience habits and time zone.³

How to check your own account in Instagram Insights

Follower activity by day and hour appears in Instagram Insights, and only on professional accounts, set up as either Creator or Business.^{1, 5} A personal account does not show it.

1. Switch the account to professional (Creator or Business) if it is not already.
2. Open Insights and look at when your followers are most active, by day and by hour.
3. Compare those peaks with the study tables above, keeping in mind that Buffer, Hootsuite and Sprout Social report local time.
4. Post in both kinds of slot for a while and compare results with one consistent metric, such as Buffer's median engagement rate formula.

Example: a coffee shop in Austin sees its followers peak in the evening, while Buffer's table points to Thursday morning. Posting at both slots and measuring engagement rate the same way settles the question for that account, and no study can settle it for them.

Buffer adds a caveat. The activity chart shows when followers are using Instagram, which is not necessarily when they engage with your content.¹

Buffer also attributes to Adam Mosseri, head of Instagram, the advice to post 30 to 60 minutes before your audience comes online. That is Buffer's attribution, and it was not verified here against Instagram's documentation.

Frequency matters too. A separate 2025 Buffer study found 3 to 5 Instagram posts per week to be the sweet spot for reach. Buffer also cites Statista to say that more than a third of Instagram users are 25 to 34 years old, a useful check when your own audience skews older or younger than that.¹

Common mistakes

• Reading the hours as Eastern Time. Buffer, Hootsuite and Sprout Social all express their slots in local time. An account in Los Angeles whose followers live mostly in New York needs the followers' clock, not its own.
• Applying the tables to one format. Buffer analyzed all post types together, so its hours are not a Reels schedule.
• Treating activity as engagement. Peak usage hours in Insights and peak engagement hours can differ.
• Mixing metrics. Hootsuite's best days refer to reach; Buffer's refer to engagement rate.
• Expecting the clock to carry weak posts. Buffer's Spanish-language guide states that no universal best hour guarantees success and that content quality is the most important factor.²

For more on how platforms weigh content, see what drives reach on LinkedIn and where B2B attention sits across social networks. And before trusting any vendor study, this guide to reading industry reports covers how to check sample and method.

Metricool does not state its sample size or time zone, so its 10:00 and Friday result cannot be weighed against the other three.

Frequently asked questions

What is the best time to post on Instagram on a weekday?

It depends on the study. Buffer's top three slots are Thursday at 9 a.m., Wednesday at 12 p.m. and Wednesday at 6 p.m. Sprout Social points to Tuesday 1–7 p.m. and Wednesday 12–9 p.m., in local time. Hootsuite names Monday, Tuesday and Thursday as the best days for reach.

What is the worst time to post on Instagram?

Buffer found that 1 a.m. to 5 a.m. performs worst on any day, and that Friday and Saturday are the weakest days. Hootsuite flags early mornings before 8 a.m. and late nights after 10 p.m. Sprout Social ranks Sunday as the lowest-performing day on every major network it measured.

Is the best time different for Reels or carousels?

Buffer's study cannot answer that. It analyzed all post types together, including Reels, carousels and photo posts, instead of splitting the numbers by format. To see format-level timing for your own account, compare results by format in Instagram Insights, which requires a professional Creator or Business account.

How often should a small business post on Instagram?

A 2025 Buffer study, cited in its Instagram timing guide, found that 3 to 5 posts per week, whether Reels, carousels or photo posts, was the sweet spot for reach. Buffer's Spanish-language guide adds that no posting hour guarantees results and that content quality matters most.

Sources

1. Buffer, "Best Time to Post on Instagram: Data from 9.6M Posts" (published Sep 23, 2026). Sample, period, engagement metric, best and worst days and hours, day-by-day table, format note, posting frequency, Statista age figure, Mosseri attribution and Insights requirements. buffer.com. Accessed Nov 10, 2026.
2. Buffer, Spanish-language guide "Mejor hora para publicar en Instagram" (published Jan 21, 2026). Statement that no universal best hour guarantees success and that content quality matters most. buffer.com. Accessed Nov 10, 2026.
3. Hootsuite, "The best time to post on Instagram [2026 data]" (July 14, 2026). Sample, countries, best hours by day, best days for reach, least effective times and dependence on audience. blog.hootsuite.com. Accessed Nov 10, 2026.
4. Sprout Social, "Best Times to Post on Social Media 2026" (March 31, 2026). Dataset, period, best Instagram times in local time and weakest day. sproutsocial.com. Accessed Nov 10, 2026.
5. Metricool, "Mejores Horas Para Publicar en Instagram en 2026" (March 24, 2026). Best general hour, best day and where to find follower activity in Instagram Insights. metricool.com. Accessed Nov 10, 2026.

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