Hardware Startup Budget Planning: From Idea to MVP

When founders talk to me about their first hardware product, the question about tooling is almost always the second one. The first is: How much budget do I need in total before I am holding a sellable product? My honest answer after more than a decade in product development: for a typical IoT device up to the first production run, you should expect €80,000 – 150,000 depending on complexity. But that lump sum will not help you pitch investors. What matters is how the budget splits across individual blocks, which money flows in which phase, and where startups most often burn cash. That is exactly what this article is about.

The 6 Budget Blocks Up to the MVP

I break every hardware budget into six blocks. The ranges apply to a mid-complexity device — at the bottom, simple products without radio or battery; at the top, devices with displays, battery packs, and wireless connectivity:

Two notes on using this table: the blocks are interconnected. Radio connectivity drives not just development but certification as well (notified body, RED testing). A display enlarges the tool and makes the mold more complex — tolerances around the screen cutout cost tooling precision. And a battery pulls transport regulations and extra test points along with it. So whenever you revise one block upward, immediately check its neighbors. If you only change one number, you are budgeting the wrong one.

Two things consistently surprise my clients. First, development is notthe biggest block — tooling and certification together often swallow more. Second, software is the most commonly forgotten item: many teams plan the enclosure and electronics down to the euro, but assume the firmware "will be handled by a co-founder". If you want a detailed breakdown of the development block, I have covered it separately in my article on CAD design costs.

The Phase Model: Budget per Phase

The same blocks spread across four phases. The advantage of this view: every phase ends with a go/no-go decision, so you never burn your entire runway before you know the product actually works:

1. Concept & feasibility (3–6 months): €5,000 – 20,000 — Requirements spec, first CAD studies, block diagram, mockup prototypes from 3D printing, cost research. The goal is to answer the right question, not to nail the final design.
2. EVT/DVT (2–4 iterations): €15,000 – 60,000 — Engineering and Design Validation Builds: CAD revisions, PCB respins, functional samples, test setup. Every iteration costs money — teams that document cleanly spend less on the next one.
3. DFM & tooling (8–12 weeks): €15,000 – 60,000 — DFM review of the enclosure, tool design and tool making, T1 samples, correction loops. The 8–12 weeks are realistic for a simple tool; multi-part enclosures take longer.
4. Pilot series: €10,000 – 40,000 — 500–1,000 injection-molded parts, electronics procurement, assembly, quality control, packaging. This is where you find out whether your product can be built reproducibly.

Note that certification runs in parallel with DVT and the pilot series, and software stretches across all phases. So do not add the phase budgets linearly — treat them as a timeline. That way you also know in which month which money is needed.

This model maps directly onto your funding rounds: a pre-seed budget typically covers concept and the first EVT iteration — enough to prove feasibility. The seed round then funds tooling, certification, and the pilot series. Exactly this coupling of milestone and cash requirement is what investors want to see. Saying "we need €300,000 for development" loses the room; saying "€136,000 to a sellable pilot series, of which €27,000 is contingency" is a plan.

The 5 Biggest Budget Killers

In retainer projects I keep seeing the same mistakes. The following five have individually emptied startup bank accounts:

1. Tooling changes after sign-off — Every change to an approved tool costs €2,000 – 15,000: welding up and re-machining steel, a new core pull, or in the worst case a second tool. Steel tools make it more expensive, and tool life suffers. The most common cause: geometry that was never moldable in the first place — knowing the typical DFM mistakes in injection molding avoids most of it up front.
2. Certification planned too late — EMC and radio requirements influence PCB layout and enclosure shielding as early as EVT. Teams that first think about the lab after tooling is built risk a redesign plus a second lab round — easily €5,000 – 10,000 extra and three months of delay.
3. Prototyping without a DFM check — A 3D-printed sample almost always works. The real question is whether the same geometry can come out of an injection mold. Without a DFM review, teams build parts that look good and then have to be redesigned from scratch. What prototypes cost per process and where the traps are, I cover in my comparison of prototyping costs.
4. Vendor lock-in on the tool — If your molder builds the tool and keeps ownership, you are tied to them for every subsequent order: uncompetitive unit prices, no supplier switch. Clarify tool ownership and the right to have the tool released before a single euro flows — the details are in my article on tooling mistakes.
5. No contingency reserve — The most common and easiest mistake to make. Production ramps almost always hold surprises: a material that will not fill, a supply chain that breaks, a standard that tightens. Without a 20–30% reserve, your budget is spent at roughly 80% of plan.

Saving Strategies That Actually Work

Saving does not mean cutting line items. It means moving money to where it reduces downstream costs. Four levers have proven themselves in my projects:

• DFM audit before tooling: An external DFM review costs in the low four figures and finds the changes that would later cost €2,000 – 15,000 each. That is the best return in the entire development budget. Details and typical savings: DFM audit: what it costs and what it saves.
• Standard components: Catalog connectors instead of custom, standard battery cells, off-the-shelf bearings and power supplies. Custom only pays off where it genuinely differentiates your product — otherwise you pay twice when something changes.
• Modular design: Decouple electronics, battery, and enclosure into exchangeable modules. A change then hits one module instead of the whole system — and you can upgrade later without redesigning everything.
• Rapid tooling for the pre-series: Aluminum tools cost 30–50% less than steel and last 500–5,000 parts. Ideal for testing market and assembly before committing to steel. How this works in practice: rapid tooling with aluminum.

Worked Example: IoT Device, 1,000-Unit First Series

Finally, a concrete cumulative example from practice: a mid-complexity IoT device — two-part plastic enclosure, LiPo battery, Wi-Fi and Bluetooth, firmware plus a simple companion app, CE certification incl. the radio equipment directive for the EU market. How such an engagement is structured is described on my prototyping service page:

Why 1,000 units for the first series? The quantity is not an end in itself: derive it from your sales forecast for the first twelve months, plus a buffer for samples, trade shows, and spare parts. Ordering too few means reordering with the tool sitting idle at the molder; ordering too much ties up capital in parts sitting in a warehouse that may still change.

Total: roughly €136,000 up to the first production run. A simple device without battery and radio lands closer to €80,000 – 90,000; a complex device with a display and a multi-part enclosure quickly reaches €150,000 and beyond. In this example I placed the reserve once at the end — realistically it is spread across all phases, because everything in EVT costs more than expected too.

My closing advice: plan in blocks and phases, not lump sums. Set an upper and lower bound for every block, re-decide after each phase, and get the DFM check done before the tool is ordered. If you want a second pair of eyes on your numbers: I am happy to review budget plans and design status in an initial consultation.

Anton Steenken

B.Eng. · Hardware R&D Engineer · Founder of engineer your idea