WORKFLOW • Framework updated · Jul 2026
AI Video Cost for Social Media: Budgeting Short Vertical Clips on a Fixed Plan
On a fixed monthly plan, the price you pay is not the number that matters most; what matters is how many finished vertical clips that plan actually delivers. This guide turns a credit allowance into a deliverable count, then layers in a revision budget, quality ceiling, and approval gates so a batch of short social clips ships on schedule without draining the pool.
Start from the finished clip, not the sticker price
Every fixed-plan budget should begin with one unit: a finished vertical clip of L seconds. Your monthly output is the credit pool divided by the cost of one clip, where one clip costs the per-second rate times L times the number of attempts you expect. Anchor the formula with a verified rate. On Runway, Gen-4.5 costs 60 credits per 5 seconds of video, so a Standard plan's 625 monthly credits buys roughly 52 seconds, or about ten 5-second clips per month. Treat that figure as a first-attempt ceiling, not a delivery guarantee. The same arithmetic works for any provider once you know two inputs, the monthly credit pool and the per-second generation rate, so gather both before you compare plans on headline price alone.
Build a revision budget into the count
A first-attempt count assumes every clip is approved on take one, which rarely survives contact with a client. Add an attempts multiplier: if you expect to generate each keeper twice on average, your deliverable count halves, so a pool that buys ten 5-second clips on paper delivers about five approved clips once a two-attempt cycle is priced in. Retry economics vary by provider and change the real cost per usable clip. On Luma, credits spent on failed generations are automatically returned to your account, which softens the penalty for rejected takes, while providers that charge for every attempt make each rejected clip a sunk cost. Decide your approval model up front: how many rounds a clip may go through before it ships, and whether a rejected take refunds credits or burns them.
Check the length and resolution ceiling
Deliverable quality is plan-gated, so confirm the ceiling before committing a batch. On Pika, the Basic plan is limited to Pika 2.5 at 480p only, while Standard and above unlock all resolutions, with clip durations of 5 and 10 seconds on the core text-to-video and image-to-video tools. Luma prices video by duration in explicit tiers: at 720p SDR, Ray3 costs 320 credits for 5 seconds and 640 credits for 10 seconds, with higher resolutions carrying higher rates. The lesson for batch planning is that length scales cost close to linearly, so doubling clip length roughly doubles the credits a batch consumes. Maximum durations and top resolutions vary by plan and change often, so verify the current ceilings on the official pricing pages before you commit. Pick the shortest length that carries your message before multiplying it across a batch.
Confirm watermark and commercial-use gates
Watermark-free output and commercial rights are plan gates, not per-clip add-ons, and a trial batch generated on the wrong tier is often undeliverable for a client feed. Runway includes watermark-free output starting at the Standard tier, listed at $12 per month on annual billing. On Pika, all paid plans allow downloading videos with no watermark and include commercial use, while the free Basic plan does not list commercial use among its features. Luma's plan grid shows watermarks on the Free and Lite tiers and no watermarks from Plus upward. Free tiers are useful for testing prompts and pacing, but before you batch on one, confirm the output you generate can legally and visually ship where it needs to. If it cannot, the entry paid tier, not the free tier, is your true starting plan.
Match cadence to rollover and expiry rules
Batch timing should match how credits reset, because most subscription credits do not roll over. On Runway, Standard-plan monthly credits do not roll over and reset within 24 hours of the billing date, the Max plan lets up to one month of unused credits roll over, and separately purchased credits never expire. Luma works similarly: monthly subscription credits expire at the end of each billing cycle with no carryover, while purchased top-up credits stay good for a year from the purchase date. For a fixed-plan buyer this means you should produce and approve within the cycle you are paying for, rather than banking credits for a later burst. If your production is lumpy, paid top-up credits are the only reliable way to carry budget across months, so plan the cadence and the top-ups together.
Put the model together for one batch
To size a real batch, work in this order. First, set the deliverable: a target count of N vertical clips at L seconds each. Second, compute first-attempt credits as N times L times the per-second rate for your chosen model. Third, multiply by your attempts factor from the approval model, so a two-round cycle doubles the estimate unless failed takes are refunded. Fourth, compare that total against the monthly pool for the tier that also clears your watermark, commercial-use, and resolution needs. If the number exceeds the pool, the levers are fewer clips, shorter length, fewer approval rounds, or a higher tier, in that order of least disruption. Documenting these four inputs turns a vague plan question into a defensible budget, and it lets you re-verify only the volatile numbers on the official pricing pages before you pay.
Editorial note: This framework is general information, not a vendor endorsement. Check the current pricing, terms, and data-handling details directly with the provider before buying.