# Length and credits > What a length band sets, what each line of the receipt charges for, the two things that stop a render before it spends, and what happens to the credits after it starts. Source: https://docs.kutly.io/settings/length-and-credits/ A render is priced by the minute, against a length fixed before it starts. In **Idea** that length is a band you pick; in **Voiceover** the file you uploaded has already set it. ## The four bands **Length** sits in the settings row under the box and opens a list of four bands, each printed as its two ends: **8 – 10 min**, **14 – 16 min**, **20 – 22 min** and **29 – 32 min**. Kutly aims at one target inside the band you pick — 9, 15, 21 or 30 minutes. The bottom of the range is the shortest that band is expected to produce; the top is the figure credits are held against. Neither end is a runtime the render is held to. In **Voiceover** the setting is on the row and cannot be changed. Your recording is the length. ## The receipt **Generate**, the arrow button at the end of the settings row, spends nothing. Beside it sits one figure — this render's cost, qualified **up to** in **Idea** and bare in **Voiceover** — and pressing it opens a receipt, headed **Generate video**. The **Generate video** button on the receipt is what reserves the credits. **Screenshot to add:** The receipt headed Generate video, carrying all three lines it can hold at once: a video line with its length and its rate per minute, a style pack line with its per-minute surcharge, and a thumbnails line priced once. Under them a total labelled Held now, and the sentence promising the difference back if the video runs shorter. Every line on it is a charge the reservation will actually make. There are three possible lines and no others. - **Video** — the length, then the rate per minute. **Idea** prints the top of your band, so the **14 – 16 min** band reads **Video, up to 16:00**. **Voiceover** prints the length it bills. - The style-pack line, labelled with the pack's own name, appears only when the pack you picked charges a surcharge. It is charged per minute, and the packs that carry it are the ones in the picker's **Premium motion design** column. - **Thumbnails** — rated **once**, and on the receipt only while the extra is on. With one line the receipt prints no credits beside it, because the line's credits and the total's are the same figure. ## Held now and Charged now The total is labelled by the mode, and the word is the promise. **Idea** reads **Held now** over a figure prefixed **up to**. **Voiceover** reads **Charged now**. One sentence under it says what happens next. In **Idea**: "If the video comes out shorter, we return the difference to your balance." In **Voiceover**: "Your narration sets the length, so this figure is final — there is nothing to return." A completed **Idea** render is priced a second time, and that second pricing only ever moves down. What was held is the most the render can cost, whether or not any of it comes back. > **Caution — Credits leave your balance on Generate video** > > Only one of the two spends. The arrow at the end of the settings row opens this > receipt; **Generate video**, at the foot of it, takes the credits and starts the > render. On a finished render, the **Output** card's **Cost** row is the net of everything that moved for that render, so it is where a return shows up. The return can land a moment after the page does, and the row updates on its own. ## How the figure is worked out Length is rounded up to a whole 15-second block, priced at the per-minute rate, and rounded up again to a whole credit. A style-pack surcharge goes into the rate before any of that, because it is charged by the minute. The **Thumbnails** extra is added afterwards, flat. The rounding is visible in one figure only: the **Voiceover** receipt's video line, which prints the length being billed rather than the length of your recording. It cannot move an **Idea** figure at all — every band's top is already a whole number of blocks. Kutly prices the render on its own side, in the step that creates it. The rate, the surcharge and the thumbnail extra are read live each time the screen draws them, and can be repriced without a release. That is why the figures are on the screen and not on this page. ## Two ways the click does not spend Everything that could stop a render is answered before the receipt opens. Two of those answers replace it with a sheet. **Not enough credits.** A short balance does not disable **Generate**: pressing it opens a sheet headed **Not enough credits**, carrying this render's cost, your balance and what you are short, with **Not now** and **See plans** at the foot. In **Idea** it also says the full amount is held up front and the unused part comes back. Before you press, the only sign is the figure beside **Generate**, which changes colour when it is more than your balance and is read out as such by a screen reader. **Too many renders already running.** Each plan runs a fixed number at a time: one on Starter, two on Creator, five on Studio, and one on an account with no plan. Pressing **Generate** at that number opens a sheet headed **Your renders are still going**, which counts what you have in flight and puts the three plans side by side. In flight means queued or rendering. Neither sheet charges anything, and closing one retries nothing — press again when you are ready. If a render finished while you were away, pressing again is all it takes; nothing needs reloading. ## After the reservation **Generate video** is the last decision on a render. Nothing in Kutly stops one after that: the screen it runs on carries no button, and a project card grows its **Download** and **Delete** menu only once the render is over. A render still running cannot be deleted, because it is still holding your credits. A render always reaches an end. One that fails returns the whole reservation, whatever stage it failed at, and one that goes silent is ended for you rather than left running, so it returns the reservation too. Deleting a finished render returns nothing. It is already paid for, and deleting it removes the video and its files rather than the charge. ## Where credits come from Credits are one balance, held by your workspace and spent by every render in it. The foot of the sidebar prints it: the word **Credits**, the figure, and **Upgrade**, the whole row a link to the plans. A plan is what puts credits there, and each one carries a number of credits a month. That screen is also where rollover, upgrades, cancellation and the charging rule are written out.