Calculate how much funding your startup needs to raise based on monthly burn rate, desired runway length, and current cash reserves.
The Required Funding Calculator helps startup founders determine exactly how much capital they need to raise. By inputting your monthly burn rate, desired months of runway, and current cash balance, this tool calculates the funding gap and shows how different raise amounts map to runway outcomes.
Raising the right amount is a strategic decision. Raise too little and you'll be fundraising again in 12 months instead of building your product. Raise too much and you give away unnecessary equity, face higher valuation expectations for the next round, and risk becoming complacent with spending. Most advisors recommend raising 18–24 months of runway.
This calculator also models different scenarios: what if burn increases as you hire? What if revenue starts offsetting costs? These projections help you arrive at a fundraising target that accounts for real-world dynamics rather than simple arithmetic.
Entrepreneurs, finance teams, and small-business owners gain a competitive edge from accurate required funding data when setting prices, forecasting revenue, or managing operational costs. Save this tool and revisit it each quarter to keep your financial plans aligned with current market realities.
Determining the right raise amount requires balancing multiple factors: enough runway to hit your next milestone, reasonable dilution, market norms for your stage, and a buffer for unexpected expenses, slower-than-planned revenue, or market downturns. This calculator removes guesswork by letting you model different assumptions and see how each affects your funding needs. Raising with a well-reasoned target demonstrates financial sophistication to investors and helps you negotiate from an informed position.
Required Funding = (Monthly Burn × Desired Runway Months) − Current Cash With Buffer: Required Funding = Required Funding × (1 + Buffer %) With Burn Increase: Adjusted Burn = Current Burn × (1 + Increase %) Required Funding = (Adjusted Burn × Desired Runway) − Current Cash
Result: $1,322,500 funding needed
At $100,000/month burn with 18 months of desired runway, total cash needed is $1,800,000. Subtracting the $500,000 currently in the bank leaves a gap of $1,300,000. Adding a 15% buffer for unexpected costs brings the target raise to $1,322,500 (rounded, most founders would target $1.3–$1.5M).
The right fundraising amount is driven by milestones, not arbitrary figures. Identify what you need to achieve to raise the next round at a higher valuation (product-market fit signals, revenue targets, user growth), estimate the time and cost to get there, and add a buffer. This milestone-based approach produces a defensible fundraising target.
Pre-seed rounds typically range from $250K to $2M, providing 12–18 months of runway. Seed rounds range from $1M to $5M for 18–24 months. Series A rounds are $5M to $20M, funding the scaling phase. These are guidelines, not rules — your specific market, team, and traction determine the right amount.
Fundraising itself consumes resources. Legal fees for a priced round run $15K–40K. Founder time diverted from product and sales for 3–6 months has opportunity cost. Travel, pitch materials, and data room preparation add up. Factor these meta-costs into your target.
If market conditions limit your raise, prioritize ruthlessly. Focus spend on the one metric that will unlock the next round. Cut nice-to-haves aggressively. Consider alternative funding sources: revenue-based financing, government grants, or strategic partnerships that come with capital.
Seed rounds in 2025–2026 typically range from $1M to $5M, with the median around $2.5M–$3M. The right amount depends on your burn rate, time to next milestone, and market norms. Raise enough for 18–24 months of runway at your projected post-raise burn rate.
A buffer is extra capital (typically 10–20%) above your minimum calculated need. Startups consistently underestimate costs and overestimate revenue timelines. The buffer protects against unexpected expenses, slower-than-planned hiring, delayed revenue, and market changes that might extend your fundraising timeline.
Yes, but conservatively. If you have consistent, growing revenue, you can reduce your funding target. However, be careful not to over-project revenue growth. Many VCs will model your raise assuming zero revenue growth to be conservative, so your base case should work without optimistic revenue assumptions.
Raising too much can be problematic. It leads to higher dilution, sets higher expectations for the next round, and can encourage undisciplined spending. However, in uncertain markets, having extra cash provides a safety net. Balance is key — raise enough to be comfortable, not so much that you lose urgency.
After raising, most startups ramp spending significantly. New hires, expanded marketing, additional infrastructure, and larger office space typically increase burn 30–60% within 3–6 months of closing a round. Always model post-raise burn, not current burn, for runway calculations.
If the market won't support your target, you have options: reduce the raise amount and extend the timeline to a smaller milestone, cut planned expenses to make a smaller raise work, bring in bridge financing from existing investors, or reconsider your go-to-market strategy to focus on revenue generation. Consult a professional for advice tailored to your specific situation.