The Social Content Mix Report 2026

1. Social teams still plan in stills

Every platform roadmap of the last three years has pointed at video. The preparation layer has not followed. Across every asset uploaded into a PlanMyGrid content plan in the study window, video accounted for 2.5% of files.

The storage column shows the second half of the story. Video is 2.5% of the files and 16.7% of the bytes. It is rare, and it is expensive, which is a fair description of how most teams treat it in production too.

2. The aspect ratio nobody plans for

We measured the dimensions of every uploaded file. The dominant group is not one of the formats Instagram documents. It is portrait content at a ratio that matches nothing: camera-roll crops, screenshots, client-supplied files, stock exports.

Read together, 4:5 portrait at 25.3% and 9:16 vertical at 8.2% describe a planning layer that is still feed-first. The vertical-video formats the platforms reward are a minority of what teams bring to the plan.

3. A third of collected assets are never used

Of 22,355 uploaded assets, 14,376 were placed into a content plan. The remaining 7,979, or 35.7%, were uploaded and never positioned.

This is the quiet cost of content operations. Teams gather far more raw material than they publish, and the surplus is invisible in every reporting tool that measures only what shipped. The ratio is worth tracking: it is a direct measure of how much production effort goes into work that never reaches an audience.

4. Plans are smaller than the tools assume

Grid planners are designed around the 3×3 block, because that is what a visitor sees when they open a profile. Most plans never get there. Of 1,838 content plans containing at least one slot, 1,204 had any content placed. Among those, the median plan held 5 posts and the 90th percentile held 14.

Only 33.1% of plans with content reached nine posts, the number needed to fill one full screen of an Instagram profile. Planning happens in short runs, not in months of queued calendar.

5. The weekly rhythm of planning

Upload activity climbs across the working week and peaks on Friday. The weekend carries 17.2% of the week between both days, less than Friday alone.

What this means

The gap between what platforms promote and what teams prepare is wider than the industry conversation suggests. If video is 2.5% of the assets entering the plan, then the production bottleneck for most teams is not distribution strategy. It is the ordinary work of collecting, cropping and sequencing stills.

The second implication is about waste. A third of gathered assets never ship, and most plans stop before they fill one screen. Both numbers point at the same thing: content operations break down at preparation, well before anything reaches an audience.

Methodology

• • Source. Anonymized aggregate counts from the PlanMyGrid production database. No personal data, no account-level data and no client data were used or published.
• • Window. 2 November 2025 to 17 September 2026.
• • Sample. 22,355 media assets uploaded by 1,598 accounts across 2,248 content plans, from a base of 2,450 accounts.
• • Exclusions. Internal, staff and test accounts were removed before every figure on this page was computed.
• • Format classification. By MIME type at upload. Aspect ratio is measured on the uploaded file, before any crop applied inside the planner.
• • Ratio bands. Square, 4:5 and 9:16 use a tolerance of 3 to 4 percentage points. Anything portrait outside those bands is counted as non-standard.

Citation and reuse

Any figure on this page may be quoted with attribution and a link. Suggested citation:

PlanMyGrid, "The Social Content Mix Report 2026", September 2026. https://www.planmygrid.com/research/social-content-mix-2026

We can supply additional cuts of this dataset on request, including format mix over time and plan-size distribution. Ask through the contact page.