--- title: "Sebastian Bardach (@bardachtech) | Hashnode" description: "Founder, Bardach Technologies · Notion templates, LUTs & free calculators. Read the latest articles by Sebastian Bardach on Hashnode." url: "https://hashnode.com/@bardachtech" --- @bardachtech # Sebastian Bardach @bardachtech · Joined November 2026 Founder, Bardach Technologies · Notion templates, LUTs & free calculators ### [Effective hourly rate on a retainer, explained: the formula that shows when a client stops paying](https://bardachtech.hashnode.dev/effective-hourly-rate-on-a-retainer-explained-the-formula-that-shows-when-a-client-stops-paying?utm_source=hashnode&utm_medium=feed) A monthly retainer has a contracted rate (fee ÷ hours included) and an effective rate (fee ÷ hours actually used). The contract shows the first. Your margin depends on the second. The formula effectiv 3 min read · [bardachtech.hashnode.dev](https://bardachtech.hashnode.dev/effective-hourly-rate-on-a-retainer-explained-the-formula-that-shows-when-a-client-stops-paying?utm_source=hashnode&utm_medium=feed) [3h ago](https://hashnode.com/posts/effective-hourly-rate-on-a-retainer-explained-the-formula-that-shows-when-a-client-stops-paying/6af8bed5194a477ff86a12b0) ### [The freelance hourly rate formula, explained: one division and the input that moves it most](https://bardachtech.hashnode.dev/the-freelance-hourly-rate-formula-explained-one-division-and-the-input-that-moves-it-most?utm_source=hashnode&utm_medium=feed) A freelance hourly rate is one division: the revenue you need over a year, divided by the hours a client will actually pay for. Both halves have a trap, and the second one is where most rates go wrong 3 min read · [bardachtech.hashnode.dev](https://bardachtech.hashnode.dev/the-freelance-hourly-rate-formula-explained-one-division-and-the-input-that-moves-it-most?utm_source=hashnode&utm_medium=feed) [21h ago](https://hashnode.com/posts/the-freelance-hourly-rate-formula-explained-one-division-and-the-input-that-moves-it-most/6af7c2d8ecb2109c710096b0) ### [2,512 product ideas, most of them killed: designing a kill-reason dataset (free 100-row sample)](https://bardachtech.hashnode.dev/2-512-product-ideas-most-of-them-killed-designing-a-kill-reason-dataset-free-100-row-sample?utm_source=hashnode&utm_medium=feed) For a month I screened ideas for small software and digital products: SaaS, web templates, books, downloads, content channels, e-commerce. 2,512 ideas went in. Most of them failed, and that turned out 5 min read · [bardachtech.hashnode.dev](https://bardachtech.hashnode.dev/2-512-product-ideas-most-of-them-killed-designing-a-kill-reason-dataset-free-100-row-sample?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/2-512-product-ideas-most-of-them-killed-designing-a-kill-reason-dataset-free-100-row-sample/6af79e2a9da2dc4637b79b92) [1d ago](https://hashnode.com/posts/2-512-product-ideas-most-of-them-killed-designing-a-kill-reason-dataset-free-100-row-sample/6af79e2a9da2dc4637b79b92) ### [Your day rate is a utilisation problem: a worked example](https://bardachtech.hashnode.dev/your-day-rate-is-a-utilisation-problem-a-worked-example?utm_source=hashnode&utm_medium=feed) Take two freelancers who want the same 60,000 a year after tax. One bills 60 % of their working hours, the other 45 %. The first can charge 77.90 an hour; the second needs 103.86 for the same life: a 2 min read · [bardachtech.hashnode.dev](https://bardachtech.hashnode.dev/your-day-rate-is-a-utilisation-problem-a-worked-example?utm_source=hashnode&utm_medium=feed) [2d ago](https://hashnode.com/posts/your-day-rate-is-a-utilisation-problem-a-worked-example/6af5a9b65d60c7ee867d364e) ### [What does one plate cost? Building a menu costing sheet from scratch](https://bardachtech.hashnode.dev/what-does-one-plate-cost-building-a-menu-costing-sheet-from-scratch?utm_source=hashnode&utm_medium=feed) Picture a bestseller that "makes good money". Costed properly it runs at 41 % food cost, because nobody re-costed it after the cream price went up. This post builds the sheet that catches that, step b 3 min read · [bardachtech.hashnode.dev](https://bardachtech.hashnode.dev/what-does-one-plate-cost-building-a-menu-costing-sheet-from-scratch?utm_source=hashnode&utm_medium=feed) [2d ago](https://hashnode.com/posts/what-does-one-plate-cost-building-a-menu-costing-sheet-from-scratch/6af5a94c8b5134d8a252388c)