Pre-Seed vs Seed: How Much to Raise and What Cash Trajectory in 2026

"How much should we raise?" is the wrong question. The right one is: "What does each euro raised buy, and how much do we need to hit the next round's milestones?" Too many founders raise too little at pre-seed (12-month runway, panic at month 8) or too much at seed (premature dilution, Series A blocked). The pre-seed vs seed arbitrage is less about amount than about trajectory.

In 2026, the market more clearly distinguishes than before two configurations: a compact pre-seed (EUR 300 k – 1 m) to validate PMF, and a substantial seed (EUR 1.5 – 4 m) to execute growth before Series A. Skipping pre-seed is possible — sometimes desirable — when the team can convince a seed fund directly with solid initial traction.

This operational guide proposes a decision framework: typical tickets, required milestones, cumulative dilution, minimum runway, choice between BSA Air, SAFE and equity. It complements our foundational article Pre-seed: founder's fundraising guide (focused on the operational mechanics of a pre-seed) by concentrating here on the strategic arbitrage between the two stages.

• 2026 pre-seed: ticket EUR 300 k – 1 m; dilution 10-18 %; runway 12-18 months; main goal = PMF proof.
• 2026 seed: ticket EUR 1.5 – 4 m; dilution 18-25 %; runway 18-24 months; main goal = scalability proven and ready for Series A.
• Cumulative dilution pre-seed + seed + Series A must remain below 45-50 % to preserve founder control. Beyond, motivation and negotiation position deteriorate.
• In 2026, two trajectories dominate: (a) BSA Air pre-seed → equity seed → Series A in 12-18 months; (b) direct seed without pre-seed when prior traction is convincing.
• The 18-month runway is the 2026 market standard for seed. Below, the next round is prepared in emergency mode and valuation deteriorates.

Boundaries have sharpened in 2024-2026 under the effect of European venture capital tightening.

Pre-seed (2026): short round, led by business angels and 1 to 2 specialised funds, financing PMF validation over 12 to 18 months. No revenue or below EUR 100 k ARR. Team of 2 to 6 people. Dominant instruments: BSA Air, SAFE.

Seed (2026): structured round led by 1 lead fund + 1 to 2 co-investors, financing post-PMF execution over 18 to 24 months. ARR usually between EUR 100 k and 800 k, growth ≥ 15 % MoM. Team of 8 to 18 people. Dominant instrument: preference shares (equity).

Pre-Series A (2025-2026 concept): intercalary round of EUR 2 to 5 m for companies that have reached seed but are not ready for standard Series A (EUR 4 to 12 m). Massively appeared in 2024 due to delayed maturity of some post-seed startups. To be considered as a variant of an extended seed.

Deeptech and fintech tickets are structurally higher due to capex (deeptech) or regulatory requirements (fintech).

2026 observed variations:

• pre-seed tickets recover slightly after the 2023-2024 trough, with a French median of EUR 600 k;
• seed tickets remain below the 2021 peak (median EUR 2 m vs EUR 2.8 m in 2021);
• pre-money valuations stabilise at EUR 4-7 m pre-seed and EUR 8-15 m seed depending on traction.

For a seed to close on favourable terms, the pre-seed must have produced five proofs:

• Product proof: functional MVP used by 30 to 100 paying users or signed pilots.
• Market proof: initial ARR EUR 50-200 k or qualified pipeline with observable conversion rate.
• Team proof: complete C-level (CEO + CTO minimum), 1-2 key hires made.
• Unit economics proof: observable LTV/CAC above 2, payback < 18 months.
• Scalable model proof: clear roadmap for the next 18 months with quantified hypotheses.

Without these five proofs, the seed turns into an extended pre-seed bridge at unattractive valuation. The scenario to avoid. Pre-seed planning must explicitly target these five milestones.

Three instruments coexist in France for pre-seed and seed.

BSA Air (Air Stock Warrants). Convertible into equity at the next round with discount (typically 15-25 %) and cap (maximum conversion valuation). Advantage: speed (2-4 weeks) and low immediate dilution. Limit: if the next round is delayed, conversion is postponed and investor risk increases. 2026 standard for French pre-seed.

SAFE (Simple Agreement for Future Equity). US-origin variant, legally adapted in France. Mechanics similar to BSA Air but without interest and with harmonised drafting (Y Combinator template). Appreciated by Anglo-Saxon funds, less common with French funds.

Direct equity (ordinary or preference shares). Longer closing (8-12 weeks) with shareholders' agreement and bylaws. Appropriate for substantial seeds (≥ EUR 1.5 m). 2026 standard for seed.

2026 typical case:

• pre-seed EUR 600 k → BSA Air with 20 % discount, EUR 8 m cap, automatic conversion at seed;
• seed EUR 2 m → preference shares equity, pre-money EUR 9 m, post-money EUR 11 m.

The recurring mistake: reasoning round-by-round without cumulative projection. Yet every percentage given at pre-seed adds up with subsequent rounds.

2026 "clean" trajectory:

At Series B, founders hold about 44 % — consistent with preserved control.

Degraded trajectory (poorly calibrated pre-seed):

Out of Series A at 41 % instead of 54 %. The 13-point gap often translates into millions of euros at exit. Entirely explained by an over-dilutive pre-seed and under-negotiated valuations.

2026 rule: keep pre-seed dilution below 12 %, seed dilution below 18 %, and aim for cumulative dilution ≤ 50 % at Series B entry.

2026 standard: 18 months of runway at closing. Not 12, not 24.

• 12 months is too short: at month 6, the next round must already be prepared, distracting the CEO from operations during the critical phase.
• 24 months is generally excessive: ticket grows, dilution increases, and 30 % of cash sits idle.

18 months is the right size:

• 12 months of execution focused on milestones;
• 6 months to prepare and close the next round.

Practical computation: monthly burn × 18 = target ticket.

• Burn EUR 30 k/month → ticket EUR 540 k (pre-seed);
• Burn EUR 100 k/month → ticket EUR 1.8 m (seed);
• Burn EUR 250 k/month → ticket EUR 4.5 m (Series A).

Add 15-20 % buffer for surprises and timing slippage. Burn must be projected after planned hires, not on current burn.

Skipping pre-seed and raising seed directly is possible and sometimes optimal in three configurations:

Configuration 1 — Experienced team with prior exit. Founders who have previously led a scale-up to exit or Series B+ can convince a seed fund directly with a deck and clear vision, no pre-seed needed.

Configuration 2 — Bootstrap traction. A team that has generated EUR 100-300 k ARR bootstrapped can skip pre-seed and negotiate seed at favourable valuation, no need to fund the validation phase.

Configuration 3 — Capex-intensive industry. Some deeptech (hardware, biotech) cannot meaningfully advance with EUR 600 k and raise directly a EUR 2-4 m seed to reach the first industrial prototype.

Conversely, going through pre-seed is recommended when:

• the team is young with no prior exit;
• no traction is yet observable;
• the target market requires a learning phase (B2B enterprise, regulated sector).

Company A — B2B SaaS HR Tech, 3 founders.

• Month 0: incorporation, 10 % BSPCE pool.
• Month 6: pre-seed EUR 600 k in BSA Air, EUR 7 m valuation cap, 20 % discount.
• Month 18: ARR EUR 180 k, signed pilots, 6-person team. Seed EUR 2 m pre-money EUR 9 m. BSA Air converted at EUR 7 m with discount → 71 k additional shares.
• Month 36: ARR EUR 1.2 m, Series A EUR 6 m pre-money EUR 25 m.

Cumulative founder dilution at Series A: 53 %. Clean trajectory.

Company B — Marketplace, 2 founders.

• Month 0: incorporation, 10 % BSPCE pool.
• Month 4: pre-seed EUR 1 m in direct equity (no BSA Air), pre-money EUR 4 m. Dilution 20 %.
• Month 14: tight runway, ARR EUR 80 k, 8 % MoM growth deemed insufficient. EUR 400 k bridge at flat valuation. Dilution +9 %.
• Month 24: seed EUR 1.8 m pre-money EUR 6 m. Dilution 23 %.
• Month 42: Series A EUR 4 m pre-money EUR 12 m.

Cumulative founder dilution at Series A: 38 %. Degraded trajectory. The intermediate bridge and low valuations cost 15 capital points.

2026 reading: Company A invested 6 months of learning before pre-seed (MVP validation in own resources), raised in BSA Air to limit dilution, and reached seed with convincing milestones. Company B raised too early and too equity-heavy, with no PMF visibility.

Three perspectives:

Perspective 1 — R&D capitalisation and JEI status as runway levers. An innovative company can capitalise its R&D spend on the balance sheet (intangible assets) to keep it off operating result. Combined with the R&D tax credit (CIR) (30 % of eligible spend, capped at EUR 100 m) and JEI status (Tax Code art. 44 sexies-0 A, 8-year IR/IS exemption + social charges on certain staff), an R&D startup can recover 15 to 25 % of its budget as cash or cost savings. This mechanically extends runway. See our Innovation financing: R&D tax credit, JEI service and our R&D tax credit / JEI startup simulator.

Perspective 2 — The "theoretical" burn mistake. Many founders reason on net burn (after R&D credit refund, after grants). Yet these refunds arrive 18 to 24 months late (R&D credit refunded in N+1, even N+2 depending on profile). The relevant burn for runway is gross burn without tax claim integration. This nuance radically changes the target ticket.

Perspective 3 — Weekly cash tracking as post-funding discipline. From pre-seed, set up weekly cash tracking with automatic alert below 6-month runway. This discipline, run by a fractional CFO or directly by the chartered accountant, allows triggering next round preparation 4 to 5 months ahead rather than in emergency.

• BSA Air without cap — refuse. Without a cap, the investor can be massively diluted on a valuation jump, breaking trust.
• Unanticipated bridge — consequence of too-short runways. Always plan a 15-20 % buffer.
• Disconnected pre-seed valuation — beyond EUR 8 m pre-money pre-seed without traction, valuation becomes unsustainable at seed and triggers a down round.
• Multi-founders without clear roles — a seed investor demands an identified C-level (CEO, CTO). Three equal cofounders without dominant role slow decisions.
• Misuse of SAFE in France — the US SAFE must be legally adapted to the French framework (uncertain tax qualification otherwise).

• Do you have a 3-round cap-table projection (pre-seed → seed → Series A)?
• Does the target ticket correspond to 18 months of gross runway + 15 % buffer?
• Have you identified the 5 milestones for the next round?
• Is the chosen instrument (BSA Air, SAFE, equity) consistent with the ticket and calendar?
• If BSA Air: is the cap set and discount reasonable?
• If equity: have shareholders' agreement and bylaws been reviewed by a venture capital lawyer?
• Have you projected cumulative dilution at Series A?
• Are JEI status and R&D credit integrated into your runway projection?
• Is weekly cash tracking in place or planned post-closing?
• Do you have a plan B if the round takes 4 months longer than expected?

Should you always do a pre-seed before seed?

No. With an experienced team or solid bootstrap traction, skipping pre-seed and raising seed directly is rational and minimises cumulative dilution. Without these assets, pre-seed remains the protective stage.

Is BSA Air always the right pre-seed instrument?

For a EUR 300 k – 1 m pre-seed, yes — speed, low cost, deferred dilution. For pre-seed > EUR 1 m or with a structuring lead fund, direct equity may be preferable.

What is the maximum acceptable cumulative dilution?

50 % at Series A entry, 60 % at Series B entry. Beyond, founder negotiation position and motivation deteriorate sharply.

How to estimate burn correctly?

Gross burn = (fixed + variable costs - cash collected) over the next 12 months, without integrating R&D credit refunds or grants. Projected with hiring assumptions.

How long does pre-seed vs seed take?

BSA Air pre-seed: 4 to 8 weeks from first meeting to wire. Equity seed: 12 to 20 weeks. Anticipate.

Raising "a lot" is not the goal. Raising just enough to hit next-round milestones under optimal valuation conditions is. This calibration discipline — compact pre-seed + substantial seed + controlled cumulative dilution — separates companies that arrive at Series A in a position of strength from those that arrive out of breath.

Our firm advises founders on multi-round cap-table projection, target ticket calibration, runway optimisation via R&D credit / JEI, and coordination with venture capital lawyers. For an audit of your financing trajectory or pre-seed/seed preparation, contact us via Fractional CFO for startups and SMEs or Growth strategy and valuation.

• Bpifrance Le Lab — French Startup Financing Observatory 2025.
• France Digitale — EY-France Digitale Venture Capital Barometer 2025.
• Banque de France — corporate financing market notes.
• French Tax Code, articles 244 quater B (R&D credit) and 44 sexies-0 A (JEI status) — Légifrance.
• BOFiP — BSPCE regime.
• Ordre des Experts-Comptables — startup cash tracking documentation.

Up to date as of 1 May 2026.