The problem: "best time to post" is two different questions
You Googled "best time to post on Instagram" and got a chart that said Wednesday at 11 AM. You posted Wednesday at 11 AM. Engagement was flat. The chart isn't wrong; it answered the wrong question. "Best time to post" means two things: the time the average account gets the most engagement, and the time YOUR account gets the most engagement. Those are different numbers, and only one of them matters for your schedule. The first is a free chart. The second is in your analytics.
Fastest path
Open the Best Time to Post Analyzer, pick your platform, pick your audience (B2C or B2B), and read the heatmap.
Instagram, B2C — top slots:
Monday 11 AM
Tuesday 1 PM
Thursday 7 PM
Those are the three highest-scoring cells in a 7-day × 24-hour engagement grid. The darker the green, the higher the score. The three red cells at the bottom are the slots to avoid. That's the whole tool — pick platform, pick audience, read the grid. The rest of this guide is what the grid can and can't tell you.
The substance: what the heatmap is, and what it isn't
The grid is a 7×24 matrix of engagement scores from 0 to 10, hardcoded per platform and audience. The numbers come from aggregated industry studies — the kind Sprout, Hootsuite, and Later publish annually — normalized to a 0–10 scale. Peak hours score 9–10; dead hours score 1–2. It is not a live feed of your account. It's the average, and the average is a starting point.
The B2B / B2C toggle is the biggest lever
Switch LinkedIn from B2C to B2B and the heatmap almost flips. B2B LinkedIn peaks at 8–9 AM weekdays (people scrolling before work) and is dead on weekends — score 1, the lowest in the grid. B2C LinkedIn shifts later, to noon and 5–6 PM, and has a small weekend bump. Same platform, different animal. If you're a B2B SaaS posting to LinkedIn at 6 PM Saturday because "the chart said LinkedIn is good at 5 PM," you used the wrong audience toggle.
The split matters less on Instagram and TikTok (mostly B2C anyway), but on LinkedIn and Facebook it moves the peak by hours. Pick the audience that matches who you're trying to reach, not who you are.
Each platform has a shape, and the shape tells you something
- Instagram (B2C): two humps — late morning (11 AM–1 PM) and evening (7–8 PM) on weekdays. Weekend mornings work (10 AM–12 PM). Late night (2–5 AM) is dead everywhere.
- Twitter/X (B2C): weekday working hours, peaking at 9 AM, 12 PM, 3 PM, and 5 PM. It's a commuting-and-lunch platform.
- Facebook (B2C): afternoon-dominant, 1–4 PM weekdays. Weekends have a smaller noon–2 PM bump.
- LinkedIn (B2B): mornings, 8–9 AM, plus a noon spike. Tuesday, Wednesday, and Thursday are the strong days. Don't post on weekends — the grid scores them 1 out of 10.
- TikTok (B2C): the only platform with 10/10 cells, and they're specific — Tuesday 9 AM and 9 PM, Thursday 12 PM and 9 PM. The pattern is irregular because TikTok's algorithm weighs recency and trending sounds more than clock time.
- Pinterest (B2C): the inverse of LinkedIn. Weekend evenings, 8–10 PM Saturday and Sunday, are the 10/10 slots. Weekday mornings are flat. Pinterest is a planning platform, not a scrolling platform.
What the grid cannot tell you
Three things, and pretending otherwise is how you post at the "best" time and get crickets.
Your audience's timezone, not yours. The grid shows times in your browser's local timezone. If you're in Berlin and your audience is in New York, "11 AM" in the grid is 5 PM in Berlin — and you should post at 5 PM Berlin time, not 11 AM. The tool doesn't shift for this. You have to.
Your industry's specific peak. The aggregated chart mixes fitness brands, SaaS companies, food bloggers, and local plumbers. Their peaks differ. A local restaurant's Instagram peaks Friday at noon (people planning weekend dinners); a B2B SaaS account peaks Tuesday at 9 AM. The chart averages those away.
Your history. The only "best time" that counts is the one your own Insights show. Instagram Insights, TikTok Analytics, and LinkedIn Analytics all have a "followers' active hours" chart. That chart is your audience's actual behavior. The generic chart is what you use when you don't have enough followers yet to fill out an Insights chart of your own.
The method that actually works
- Start with the tool's heatmap for your platform and audience. Pick the top 3 slots.
- Schedule one post per slot for two weeks. Same content quality, different times.
- Pull your platform's native analytics after two weeks. Compare reach and engagement per post.
- Keep the slot that won. Drop the two that didn't. Pick two new slots from the grid and repeat.
- After a month you have your own heatmap. Use that. The generic chart is training wheels; your analytics is the bike.
Gotchas
- The heatmap is hardcoded, not live. The numbers are from industry studies, not your account. They drift as platforms change algorithms; treat the scores as a rough guide, not a promise.
- Times display in your browser's local timezone. If your audience is elsewhere, convert mentally before you schedule. The tool doesn't do it for you.
- TikTok's peaks are volatile. Tuesday 9 AM scores 10 in the grid, but a trending sound at 11 PM on a Sunday can outperform it. For TikTok, recency and sound matter more than the clock.
- LinkedIn weekends are dead for B2B. Score 1 out of 10. Save the weekend draft for Monday morning.
- Pinterest is the opposite of LinkedIn. Weekend evenings are the peak. Posting Pinterest at 9 AM Tuesday is wasting a pin.
- Consistency beats timing. Posting 4× a week at "good" times beats 1× a week at the "perfect" time, every time. The algorithm rewards volume and recency; the clock is a 10% optimization on top of that.
- The B2B / B2C toggle changes everything on LinkedIn and Facebook. Don't skip it. The default is B2C; if you're B2B and forget to toggle, you'll post at the wrong hours.
Summary
- "Best time to post" is two questions: the average's best time (a free chart) and your account's best time (your analytics). Only the second matters for your schedule.
- The tool's heatmap is a 7×24 grid of aggregated engagement scores per platform and audience. Pick platform, pick B2B or B2C, read the dark-green cells. The B2B/B2C toggle moves the peak by hours on LinkedIn and Facebook — don't skip it.
- Each platform has a shape: Instagram has a midday and evening hump; LinkedIn is weekday mornings; Pinterest is weekend evenings; TikTok has irregular 10/10 spikes tied to trends more than the clock.
- Use the generic chart to pick your first three slots. Then measure your own engagement, keep what wins, and build your own heatmap. The chart is training wheels; your analytics is the bike.
- Find your starting slots at the Best Time to Post Analyzer; pair with Hashtag Generator for reach, Instagram Caption Writer for the post itself, and Social Media Bio Generator for the profile that has to convert the clicks you earn.