How Much Money Should You Raise? A Milestone-Based Method

How much money to raise comes down to one question: what must be true for your next round, or for profitability, and what does it cost to get there? In our view, a sound raise funds that milestone plus roughly 9 to 12 months of buffer to raise again, which usually means 18 to 24 months of runway and, per Carta's July 2026 data for software companies, about 18 percent dilution at the median seed.

Definition: Round size is the amount of new capital a startup takes in one financing. Under the milestone method, it equals the cash needed to reach a specific, provable result, plus a buffer for the time it takes to raise again, minus cash already in the bank.

A round size isn't a score. It's a budget with a deadline attached.

Many founders pick the number backward, from what a peer raised or an investor hinted at. We'd suggest the opposite order: milestone first, money second, ownership third. For the cash-planning side in depth, see our guide to burn rate and runway.

Why "how much money to raise" is a milestone question

Investors don't fund months. They fund proof.

A seed round buys the evidence that earns a Series A. A pre-seed round buys the evidence that earns a seed. If the money runs out before the evidence shows up, you raised a bridge to nowhere.

So the first job is to name the proof. For B2B software heading to a Series A, CRV's March 2026 guide puts the competitive ARR bar at roughly $2M to $5M, and cites SVB data showing median revenue at Series A of $2.5M in 2025. At pre-seed the proof is usually smaller and more qualitative: a product people use, a handful of paying customers, a channel that repeats. Our guide on when to raise a Series A lays out the later bars by business model.

Geoff Ralston, then a partner at YC, made a useful framing point in his 2018 Startup School fundraising lecture: plan each raise as if it might be your last, so the money gets you to a persuasive milestone or to profitability. We like that as a stress test even when you fully expect to raise again.

How much money to raise: the milestone method in five steps

Here's one way to get from a blank spreadsheet to a defensible number. Adapt it to your business.

Step 1: Write the milestone as a number and a date

"Grow" is not a milestone. "$2M ARR with 110 percent net revenue retention by month 15" is. Pick the two or three metrics a lead investor at the next stage will look at first, and write down the level that would make that round straightforward rather than possible.

Step 2: Cost the plan month by month

Build burn from the hiring plan and the spend that actually produces the milestone: count the hires, price each one fully loaded, add the rest. Model burn as it ramps, not as a flat average, because most of your spend lands late in the plan.

Step 3: Add the time it takes to raise again

This is the step founders skip. You can't start the next raise on the day you hit the milestone and expect cash the next week. Gustaf Alstromer, a partner at YC, suggests in a short YC talk that founders treat a round as roughly 24 months of money, start the next raise with about 8 months left, and so plan to hit their milestones in about 16 months. Our house view lands close by: start raising with 9 to 12 months of runway left.

Step 4: Add a contingency

Plans slip. A buffer of 10 to 20 percent on top of planned burn is a common approach.

Step 5: Subtract cash on hand and check the dilution

Whatever you still have in the bank comes off the total. Then divide the result by a realistic post-money valuation. If the answer lands far outside the usual dilution band, the plan or the milestone may need another look (more on that below).

A worked example: sizing a seed round

The numbers here are illustrative, chosen to show the arithmetic.

A B2B software company has $450K in ARR and $350K in the bank. Its Series A milestone is $2M ARR, which the founders think they can reach in about 15 months. They want 9 months of buffer after that to run the Series A process, so they plan for 24 months of runway.

Net burn ramps as the team grows:

• Months 1 to 6: $110K a month, or $660K
• Months 7 to 12: $150K a month, or $900K
• Months 13 to 24: $170K a month, or $2.04M

Total planned burn is $3.6M. A 15 percent contingency takes it to $4.14M. Subtract the $350K already in the bank and the raise is about $3.79M, which they round to $3.8M.

At a $20M post-money valuation, $3.8M is 19 percent dilution. At $18M post-money it would be about 21.1 percent, and at $24.3M (Carta's July 2026 median seed valuation) about 15.6 percent. That's close to Carta's $4.1M median seed.

Now test the alternatives.

Raise less: $2.5M. With $2.85M in total cash, the same burn plan lasts 19 months. The milestone arrives around month 15 with roughly 4 to 5 months of cash left, which is too thin to run a Series A process comfortably. The founders would likely have to raise a bridge or cut burn right as they need to show momentum.

Raise more: $6M. At the same $20M post-money, that's 30 percent dilution. Even if more money pushes the price to $26M post-money, it's about 23.1 percent. The extra cash buys runway the plan doesn't use, at a permanent cost in ownership.

For how this compounds across rounds, see our guide to SAFE dilution and stacked SAFEs, since earlier SAFEs convert at the same time and add to the total.

How much dilution is normal for a round?

Carta's July 2026 benchmarks, drawn from about 1,000 software rounds in the prior six months, put median dilution at 18 percent for both seed and Series A, 12 percent at Series B, and under 10 percent at Series C. Carta's State of Private Markets: 2025 in Review shows the broader trend: median dilution across rounds from seed through Series C fell over 2025 from about 18 percent to 16 percent.

Investors' own rules of thumb sit in the same zone. Fred Wilson's 2011 post on AVC suggests 10 to 20 percent per round for seed through Series B. YC's long-standing seed guide (2016) puts most seed rounds at up to 20 percent and suggests trying to avoid more than 25 percent. Ralston's 2018 lecture put seed at 10 to 20 percent and Series A at 20 to 25 percent, sometimes 30.

If your milestone plan implies 30 percent or more at seed, we'd treat that as a signal. Options include a smaller first milestone, a cheaper path to it, raising in two steps, or building more traction before you go out. Our guide to seed valuations and venture return math explains why pushing the price up instead has costs of its own.

How much money to raise at pre-seed, seed and Series A

The method holds at every stage. The milestone changes.

Pre-seed. Round sizes vary so widely that a median says little. Carta's Q1 2026 pre-seed report shows rounds of $1M to $2.5M fell to 18 percent of pre-seed rounds, down from 24 percent in Q1 2023, as rounds under $1M became more common while rounds above $2.5M held roughly steady. We'd size a pre-seed round to the specific evidence a seed lead will want, not to a market average. Our sibling guide on how to raise a pre-seed round covers the rest of that process.

Seed. The worked example above is the typical shape. Carta's February 2026 analysis of 9,843 US rounds on its platform put the median gap between seed and Series A at 1.9 years as of Q4 2025, trending back toward the 18 to 24 month band. A seed round that funds less than that may force a raise before the evidence is in.

Series A. The milestone becomes an engine rather than a signal: a sales motion you can pour money into.

Where investors disagree on runway

The 12 to 18 month camp. Fred Wilson's 2011 AVC post suggests raising 12 to 18 months of cash each time, on the logic that money beyond 18 months is capital sold at today's lower price. YC's 2016 seed guide also used 12 to 18 months. So did our own earlier VC Unfiltered take on how much money to raise.

The 18 to 24 month camp. First Round's Josh Kopelman, in a 2015 First Round Review piece, suggests targeting 18 to 24 months after a seed. Alstromer's 24-month framing fits here, and so does Carta's data showing the median seed-to-Series A gap near two years.

The "goal plus a year" camp. Sequoia's 2022 Extending Your Runway deck, written for a downturn, goes further: runway equal to the time needed to reach your next valuation milestone plus 12 months.

Our read: the gap between the camps is mostly about how long it now takes to raise. When rounds came quickly, 12 to 18 months was enough. With the median seed-to-A gap around two years in Carta's data, we lean to 18 to 24 months for most seed companies. It's our answer, not the answer. A capital-light company with strong revenue can reasonably raise less, and a deep tech team may need more.

"But investors are offering more. Why not take it?"

It's a fair instinct. Cash is insurance, markets close without warning, and Ralston's advice to plan each raise as if it were the last points the same way.

But more money changes more than the bank balance. Mark Suster's 2016 essay on raising too much makes the case that founders tend to spend whatever they raise in roughly the same timeframe, and that a big round at a big price raises the bar for the next one. His line is worth keeping: "Having more money makes today easier, having a lower valuation makes tomorrow easier."

We've made a related argument about what oversized pre-seed rounds do to discipline.

Our view: taking more can make sense when the extra cash buys a specific, named risk reduction (a longer sales cycle, a regulatory step, a key hire) at a dilution you'd accept anyway. If it just buys time, consider leaving it on the table.

A use-of-funds template you can copy

Investors will ask what the money buys. One way to answer in a few lines:

We are raising $[amount] to reach [milestone, as numbers] by [month].

Plan:
- Team: [n] hires ([roles]), about $[x] of the total
- Go-to-market: [channels], about $[x]
- Product and infrastructure: about $[x]
- Contingency: [10 to 20]% of planned burn

Runway: [months] at planned burn, including about [9 to 12]
months to raise the next round after the milestone.

Next round: at [milestone], we expect to raise a [stage]
from investors who look for [metric levels].

Keep the categories broad. At seed, investors mostly want to see that the number ties to a milestone and the hires that produce it.

If you want a structured walk-through of sizing and the rest of a raise, the 1752vc Fundraising module inside 1752 Fundraising offers video lessons and guides on how to raise from the 1752vc team. Once you know the number, its investor matching can line up angels and VC firms whose check size fits the round you just sized.

Common mistakes when deciding how much to raise

• Forgetting the raise itself takes months. A plan that hits the milestone with 3 months of cash left is a plan to raise a bridge. Our guide on how long it takes to raise a round has the timeline data.
• Flat-lining burn. Spend ramps as you hire. Averages understate the back half of the plan.
• Sizing to the valuation you want. Raising more to justify a higher price can leave you with a number you then have to grow into.
• Ignoring earlier SAFEs. They convert alongside the new round and add to dilution.

A program can help with the milestone half of the equation. 1752vc's Accelerate invests $100K (at a valuation cap of up to $3.5M) in early-stage startups ready to grow and trains founders in founder-led sales, which in our view is a direct route to the revenue proof a seed lead wants.

Where we land

Name the proof. Cost the path. Add the time to raise again. Then check the price.

If the number lands near the medians, good. If it doesn't, that's information about your plan, not a reason to fudge it. If you're unsure whether the business can survive on what you raise, the default alive test is a quick check.

The bottom line

The right round is the smallest one that reliably gets you to a milestone the next investor can't ignore, with room to raise from strength.

Raise for the proof.

Not for the headline.

Key takeaways

• A milestone-based raise funds a specific, provable result plus about 9 to 12 months to raise again, which usually means 18 to 24 months of runway at seed.
• Carta's July 2026 data puts median dilution at 18 percent for software seed and Series A rounds, and a plan that implies 30 percent or more may need another look.
• Investors disagree on runway: some favor 12 to 18 months, others 18 to 24, and Sequoia's 2022 deck suggested the milestone timeline plus 12 months.
• Modeling burn as it ramps, adding a 10 to 20 percent contingency and subtracting cash on hand tends to give a more honest number.
• Taking extra money can make sense when it buys a named risk reduction; if it only buys time, the dilution may outweigh the comfort.

Frequently asked questions

How do you calculate how much money to raise?

One common approach is to define the milestone for your next round, add up monthly net burn from today until you reach it, add about 9 to 12 months for the next raise, then add a 10 to 20 percent contingency. Subtract cash on hand. Finally, divide by a realistic post-money valuation to check that dilution lands near the typical 10 to 20 percent band.

Is it bad to raise too much money for a startup?

It can be. A larger round usually means more dilution or a higher valuation, and a higher valuation raises the bar for the next round. Some investors also argue that founders tend to spend what they raise in a similar timeframe whatever the amount. Extra capital is easier to justify when it funds a specific, named risk such as a long sales cycle.

What happens if you raise too little money?

The usual risk is running short before you reach the milestone the next investor needs, which leaves you raising from a weak position. Founders in that spot often cut burn, raise a bridge from existing investors on less favorable terms, or accept a lower valuation. Planning 9 to 12 months of buffer after the milestone is one way to reduce that risk.

Should you raise more if investors offer more than you asked for?

Not automatically. In our view, it is worth asking what the extra money would buy, what it costs in ownership, and whether it raises the valuation your next round has to beat. If it funds a clear risk reduction at dilution you would accept anyway, it can be worth taking. If it only adds idle months, many founders decline it.

How do you explain use of funds to investors?

A short paragraph usually works: the amount, the milestone it reaches and by when, the main spending buckets (team, go-to-market, product) with rough amounts, the runway it buys, and what the next round looks like at that milestone. At seed, investors generally care more that the number ties to a milestone than about a detailed line-item budget.

Sources

• Y Combinator: Fundraising Fundamentals (SUS 2018) (Geoff Ralston)
• Y Combinator: How Much Should You Spend After Fundraising? (Gustaf Alstromer)
• Y Combinator: A Guide to Seed Fundraising
• First Round Review: What the Seed Funding Boom Means for Raising a Series A
• Sequoia Capital: Extending Your Runway (2022)
• AVC: How Much Money To Raise
• Both Sides of the Table: Why Raising Too Much Money Can Harm Your Startup
• Carta: VC Startup Fundraising Benchmarks From 1000 Rounds
• Carta: Time Between Startup Rounds Is Finally Trending Down
• Carta: State of Private Markets: 2025 in Review
• Carta: State of Pre-Seed, Q1 2026
• CRV: Series A Metrics VCs Expect in 2026