Startup burn rate and runway 2026: calculation and 90-day plan to extend your cash

Updated 15 May 2026. Burn rate and runway are the two financial indicators every startup founder must master. They determine how long you have before running out of cash — and therefore the window available to reach profitability or close a new funding round. In 2026, with fundraising more competitive and due diligence more thorough, managing these metrics precisely is not optional.

Hayot Expertise supports startups, SASU and SAS entities in Paris with financial dashboards, cash flow planning and fundraising preparation. This article covers exact definitions, 2026 benchmarks, and a concrete 90-day plan to extend runway when cash is under pressure.

Quick summary. Gross burn is the total of all monthly cash outflows. Net burn deducts incoming revenue. Runway in months equals available cash divided by net burn. In 2026, a healthy runway exceeds 18 months. Below 12 months, a corrective plan should start immediately. Below 6 months, the situation is critical.

Gross burn rate: total monthly cash out#

Gross burn is the sum of all cash outflows in a calendar month: salaries and employer social charges, rent, SaaS subscriptions, contractors, servers, marketing agencies, and general administrative costs (G&A). It is the cash that actually leaves the bank account, regardless of revenue. For a team of 8 people in Paris with office space, gross burn typically falls between EUR 120,000 and EUR 200,000 per month depending on seniority levels.

On the accounting side, gross burn consolidates debit entries in expense classes and corresponds to operating outflows in the cash flow statement. It does not include principal debt repayments, which appear under financing activities.

Net burn rate: the real monthly deficit#

Net burn is the net cash consumption after deducting inflows. Formula: net burn = gross burn - monthly cash receipts (client revenue, licences, grants received in cash). A B2B startup collecting EUR 50,000 in MRR with EUR 200,000 in gross burn has a net burn of EUR 150,000.

The distinction matters: a pre-revenue startup has identical gross and net burn. A growing startup with increasing revenue sees its net burn compress progressively until it reaches cash break-even. Conflating the two produces a misleading picture of the trajectory.

Runway: how many months do you have?#

Runway (months) = available cash / monthly net burn

With EUR 2,400,000 in the bank and net burn of EUR 200,000/month, runway is 12 months. If headcount or marketing spend is growing, use the trailing 3-month average net burn or build a monthly forward forecast. Available cash should exclude restricted funds (security deposits, VAT provisions, payroll taxes still to be paid) and include only unrestricted current account balances.

Three documents to consolidate monthly#

Accurate burn monitoring relies on three monthly financial documents: (1) a monthly income statement by cost category, to identify which lines are drifting; (2) a 13-week rolling cash flow forecast, to anticipate shortfalls; (3) a simplified monthly balance sheet, to track working capital. These documents are complemented by a KPI dashboard integrating MRR, churn, CAC and LTV for SaaS businesses.

Cost classification: fixed, variable and semi-variable#

The burn diagnostic begins with exhaustive cost classification. Fixed costs (rent, permanent headcount, infrastructure subscriptions) form the non-compressible base. Variable costs (commissions, paid acquisition, project-based contractors) can be switched on and off quickly. Semi-variable costs adjust with a 30-to-60-day lag. In a burn reduction plan, the sequence is: variable first, then semi-variable, then fixed as a last resort.

SaaS metrics: MRR, ARR, CAC, LTV, ARPU#

For a SaaS startup, net burn cannot be interpreted without growth metrics. An LTV/CAC ratio above 3 with a payback period below 18 months signals a viable model. ARPU quantifies the impact of an expansion strategy on net burn compression: a 20% increase in ARPU from the existing base can add several months of runway without a single new hire.

In 2024-2025, the French and European venture capital market tightened significantly: valuations fell, rounds took longer to close, and investors demanded longer runway at entry. France Invest data (to be confirmed) indicates that Series A and B rounds took an average of 5 to 8 months to close in 2024-2025. This reality means that investor discussions should start well before 12 months of runway, with 18 to 24 months targeted at closing.

Typical burn for a 5-15-person pre-revenue team in Paris#

For a 5-person team in Paris (3 developers, 1 product manager, 1 CEO) in coworking, gross burn typically falls between EUR 60,000 and EUR 100,000 per month. For a 10-to-15-person team with 2 salespeople, a senior CTO and support functions, gross burn rises to EUR 150,000-250,000 per month. These ranges include employer social charges (approximately 42% above gross salary for a full CDI employee outside exemption schemes).

Phase 1, days 1 to 15: diagnosis#

The first two weeks must produce an exhaustive analytical picture of costs. The goal is not to cut immediately but to understand: which lines are strategic, which are legacy, which contracts have not been reviewed recently. Extract 6 months of bank statements, categorise them (HR, infrastructure, marketing, G&A, tools, premises, vendors), and date each commitment. This mapping systematically reveals 8 to 15% of costs that were not consciously tracked.

Phase 2, days 15 to 30: reducing non-strategic costs#

The SaaS audit is usually the first lever. Startups accumulate tools — dormant licences, redundant subscriptions, tools used by only one or two people. A methodical audit identifies those whose value is marginal. Savings of EUR 5,000 to EUR 20,000 per month on this single line are common. Contractor contracts also deserve review: which are tied to a strategic activity, which are habitual?

Phase 3, days 30 to 45: HR decisions#

Freezing planned hires is typically the first step: deferring a senior hire by 3 to 6 months reduces burn by EUR 8,000-15,000 per month without immediate productivity impact. If restructuring is necessary, the applicable French labour law framework (PSE, rupture conventionnelle collective, accord de performance collective) must be followed with the support of a specialist employment lawyer. Hayot Expertise covers the financial and accounting dimension of these plans, not the legal representation.

Phase 4, days 45 to 60: commercial recovery#

Under cash pressure, commercial effort should refocus on what generates cash quickly: expansion within existing accounts (upsell, cross-sell), churn reduction (identify at-risk customers, activate retention playbooks), and accelerating collections. A customer switching from monthly to annual prepay immediately improves cash by 11 months of subscription revenue.

Phase 5, days 60 to 75: supplementary financing#

Several non-dilutive financing options exist before considering a dilutive round. BPI France's Pret Innovation can finance up to EUR 5 million for innovative projects at non-dilutive rates. A bridge loan from existing investors provides short-term debt convertible at the next round with a discount. Revenue-based financing (RBF), offered by providers such as Karmen or Unlimitd, allows borrowing against future revenue with repayment proportional to MRR.

Phase 6, days 75 to 90: weekly monitoring#

A weekly reporting cadence tightens the feedback loop: cash balance on Monday morning, week's expenses, variance against forecast, commercial indicators. The plan is presented to the board every two weeks, with a clear decision point: continue, accelerate cuts, or pivot the financing strategy.

Bridge loan: pros and limits#

A bridge loan is typically granted by existing investors, convertible at the next round with a preferred conversion rate (15-25% discount on next round valuation, or a valuation cap). Advantages: speed (2 to 6 weeks), no immediate dilution, signal of support. Limits: it creates a liability on the balance sheet, may complicate the next round negotiation if the expected valuation is lower than the previous round.

New round: when is it preferable?#

A new institutional round is preferable when the startup has reached sufficient metrics to negotiate from a position of strength (ARR above EUR 1 million for a Series A in 2026, controlled churn, net revenue retention above 100%), and when the capital need is structural. The informal rule: start discussions at 18 months, target closing at 12 months.

Non-dilutive debt options in France#

BPI France Pret Innovation (fixed rate, 5-7 years, possible capital moratorium) is designed for innovative SMEs and startups. Receivables financing (affacturage) improves working capital without dilution. Some family offices and specialist debt funds offer mezzanine loans at 8-14% rates without immediate dilution — compare this to the dilution cost of a new round at current 2026 valuations.

A 12-person Paris B2B SaaS startup raised EUR 6 million in a Series A in early 2024. ARR at the time: EUR 2 million. Gross burn: EUR 250,000/month. Net burn: EUR 200,000 (EUR 50,000 in MRR collected). Initial runway: 30 months.

Two years later, in early 2026: ARR had grown to EUR 3.2 million but slowly (rising churn in the mid-market), gross burn had increased to EUR 280,000, net burn stood at EUR 213,000. Remaining cash: EUR 1,800,000. Recalculated runway: 8.5 months.

The startup engaged a 90-day plan with Hayot Expertise as external CFO: SaaS audit (EUR 18,000/month saved), freeze of two planned hires (EUR 22,000/month saved), customer retention focus (churn reduced from 3.5% to 2.1% monthly), BPI application filed. At day 90, net burn had returned to EUR 155,000, runway had extended to 12 months, and bridge discussions of EUR 1.5 million were underway in materially better conditions.

For early-stage startups, a well-structured spreadsheet (18-month cash flow forecast, MRR and churn tracking, budget-vs-actual) is often sufficient. From the growth phase onwards (team above 10 people, ARR above EUR 500K), specialist tools add real value. Pennylane synchronises bank and accounting flows in real time. Pigment and Finthesis enable dynamic scenario simulations. These platforms also include investor reporting formats.

Most critical situations we see at Hayot Expertise do not result from a sudden catastrophe but from an undetected drift: revenues growing more slowly than costs, hires anticipated before demand confirmed, SaaS tools never audited, flattering MRR masking rising churn.

The underestimated risk: confusing gross burn and net burn. A startup with EUR 150,000 in monthly revenue and EUR 250,000 in outflows has a net burn of EUR 100,000 — not EUR 250,000. Calculating runway on gross burn leads to excessive caution that may block legitimate investment. Conversely, calculating runway on net burn flattered by exceptional inflows creates false security.

The 90-day plan is not a crisis plan — it is a management tool. Startups that deploy it at 15 months of runway have far more options than those who discover the need at 5 months.

• Seasonal cash inflows: sectors with annual budget cycles experience peaks and troughs. Calculate on a trailing 3-month average, not the latest month alone.
• Hidden variable costs: seasonal spikes (Google Ads campaigns, trade shows, recruitment surges) temporarily inflate gross burn. Identify them to avoid compressing them at the wrong moment.
• Interest rates 2025-2026: short-term rates remain meaningful. A term deposit on excess cash can generate non-negligible yield — compare to the cost of a bridge.
• Strengthened investor due diligence: in 2026, investors require reconciliation between declared burn and 12 months of bank statements. Monthly accounting statements certified by a chartered accountant have become a fundraising prerequisite.

• Calculate net burn for the past 3 months (not gross burn alone)
• Calculate real runway based on available cash, excluding restricted funds
• Classify all costs as fixed / variable / semi-variable
• Identify the 5 highest-leverage cost lines actionable within 30 days
• Build a 13-week rolling cash flow forecast
• Establish a formal monthly board reporting cadence
• Assess LTV/CAC ratio and payback period
• Document available alternative financing sources (BPI, bridge, RBF)
• Confirm monthly accounting statements are accurate and up to date

This article is for information purposes only. Financing, restructuring and cash management decisions must be made in light of your specific situation, legal documents and current market conditions. Hayot Expertise can support you in this analysis.

Sources. BPI France (bpifrance.fr), France Invest / AFIC (private equity panorama 2025), Banque de France (SME credit statistics), Pennylane (treasury management), Ordre des Experts-Comptables.