Bridge Rounds Explained: Quick Cash Before Series A (2026 Strategy)
Quick Answer
A bridge round is temporary funding between seed and Series A, typically $500k–$2M, used to extend runway while you're preparing for a larger round. Structure: usually a convertible note or SAFE with a discount (25–30%) and cap ($3M–$5M). Bridge dilutes you less than a full Series A because the valuation is uncertain. Trap: bridge rounds at bad terms can be worse than just cutting burn rate and extending runway naturally.
When Do You Need a Bridge Round?
Scenario 1: Good trajectory but need more runway
- Seed round closes in month 6 of your company
- You raised $750k at $2.5M post-money
- You're growing 10% month-over-month
- But you won't hit Series A targets (profitability or $2M ARR) for another 12 months
- Your runway will run out in month 18
Solution: Bridge round of $600k. This extends runway 7 more months. Now you have 25 months to hit Series A targets.
Scenario 2: Series A conversation stalled
- You're in talks with a tier-1 VC for Series A at $50M post-money
- But they want to see one more quarter of metrics before committing
- Your runway runs out before that quarter closes
Solution: Bridge round of $300k from existing seed investors. You hit the Series A milestones, close the A, bridge is subsumed into A.
Scenario 3: Founder burnout, personal runway issue
- Your company is growing fine
- But you haven't paid yourself in 8 months
- You're running out of personal savings
Solution: Bridge round, structured to allow founder salary. Not ideal but better than burning out.
Bridge Round Structures (2026 Style)
Option 1: SAFE Bridge
Simple, fast, no maturity date.
Terms:
- $500k investment
- 25% discount (converts at 75% of Series A valuation)
- $4M valuation cap
Example: Series A closes at $20M valuation
- Investor converts at: 75% of $20M = $15M cap
- Investor investment: $500k at $15M = 3.33% ownership
Option 2: Convertible Note Bridge
Traditional, includes interest rate and maturity date.
Terms:
- $500k investment
- 8% annual interest
- 30% discount
- $4M valuation cap
- 24-month maturity
Example: If Series A doesn't close in 24 months
- Investor can either demand repayment with interest ($500k + $80k = $580k)
- Or convert to Series A at discount
Option 3: SAFE with Priced Equity Option
Hybrid: SAFE by default, but can ask for priced round if valuation is high.
Used when founder wants to "test" the market without committing to a full Series A.
Bridge Round Dilution
Bridge rounds typically dilute less than Series A because:
- Discount means lower effective valuation
- Cap means early investors get a deal if valuation is high
- Maturity date creates urgency (might accept better Series A terms)
Example: Bridge round dilution
Before bridge:
- Founder: 60%
- Seed investors: 40%
Bridge round: $500k at $3M cap, 25% discount
- Investor gets: $500k ÷ $3M = 16.7% post-bridge
- Founders + seed diluted to: 83.3%
Series A: $5M at $20M post-money
- New investors get: $5M ÷ $20M = 25%
- Bridge investor converts at discount ($3M effective): 16.7% × (1 - 25% dilution) = 12.5%
- Founder: 60% × (1 - 25% dilution) = 45%
Bridge typically dilutes 15–25% total (compared to 25–35% for a full Series A).
Common Bridge Round Traps
❌ Trap 1: Taking a bridge when you should just cut burn Your runway is 14 months but you're growing slow. Instead of a bridge, cut 30% burn. Now you have 20 months.
You avoid dilution, and you might force team to be more efficient.
✅ Better approach: Only take a bridge if you're on trajectory to hit Series A targets within 6 months. Otherwise, optimize burn.
❌ Trap 2: Bridge terms worse than Series A terms You take a bridge at $2M cap and 30% discount. Three months later, you close Series A at $30M valuation.
Your bridge investor converts at: 70% × $30M = $21M cap (instead of $2M). They got crushed.
They're angry. This is how investors feel when a bridge has a low cap.
✅ Better approach: Set bridge cap realistically. $3M–$5M for most seed-stage companies. Not $1M.
❌ Trap 3: Bridge becomes a "permanent bridge" You take a bridge in month 12 to get to Series A. Series A conversations drag. Now it's month 24 and you're in Bridge 3.
At some point, bridge rounds have too much dilution and become more like equity rounds.
✅ Better approach: Bridge is temporary. If you haven't Series A'd within 12 months, something is wrong. Raise a real Series A or cut burn.
Step-by-Step: Decide on a Bridge Round
Calculate current runway
- Available cash ÷ monthly burn = months
- If >18 months, you don't need a bridge
Project Series A timeline
- When will you hit Series A targets?
- When will Series A close? (fundraising takes 3 months)
Calculate runway shortfall
- Months until Series A close - months of current runway = shortfall
- Example: Series A in month 18, current runway 14 months = 4-month shortfall
Size your bridge
- Bridge amount = (monthly burn) × (shortfall months) × 1.2 (buffer)
- Example: $30k burn × 4 months × 1.2 = $144,000
- But bridges are typically $500k minimum (typical in 2026)
Decide: bridge vs. cut burn
- Cutting 20% burn buys you 3 months
- Bridge costs 12–16% dilution
- Which is better for your situation?
Negotiate bridge terms
- Cap: aim for $3–5M (2–3x your post-seed valuation)
- Discount: 25–30%
- Maturity: 24 months out (plenty of time to close Series A)
Model cap table impact
- Use /products/cap-table-dilution-calculator
- See how bridge + Series A dilution combines
Close bridge (usually 2–4 weeks)
- Much faster than Series A
- Legal docs are standard
- Minimal due diligence
Use /products/bridge-round-sizing-calculator to verify size
FAQ
Q: Who typically invests in bridge rounds? A: Existing seed investors (they want to keep supporting you). Sometimes new investors who missed seed. Rarely VCs (they prefer Series A).
Q: Can I do multiple bridge rounds? A: Yes, but more than 2 is a red flag. Series A investors see it as: "You've been raising bridge for 18 months and can't get a real round. Problem."
Q: What if Series A doesn't close? A: Bridge maturity date means investors can demand repayment. Most bridge documents have a "maturity extension" clause (you can extend 12 months). But if Series A doesn't close by year 2, the bridge is a problem.
Q: Should I tell my team about a bridge? A: Yes, after it closes. Frame it as: "We're extending runway to hit the next milestone." Transparency builds trust.
Q: Is bridge interest rate tax-deductible for the company? A: Yes. Bridge interest is a business expense.
The Bridge Round Mindset
Bridges are training wheels. They give you time to hit Series A targets.
Use that time to:
- Hit aggressive growth milestones
- Expand customer base
- Reduce burn
- Make Series A inevitable
If you can't hit Series A targets within 12 months, a bridge won't save you. A bridge just delays the problem.
Use /products/bridge-round-sizing-calculator to determine if you even need one.