---
title: "The Most Important Principle of Start Up Fund Raising"
description: "Learn the essential principle of startup fundraising: how to strategically raise enough capital to hit key milestones that attract your next round of venture investment."
categories: ["fundraising"]
keywords: ["Theory Ventures","Tomasz Tunguz","startup fundraising","venture capital","seed funding","Series A","investment milestones","follow-on capital","financial planning for startups"]
ai_summary: "Learn how to strategically raise startup funds to achieve milestones that attract future investments."
date: 2013-02-01
lastmod: 2026-07-31
canonical_url: https://www.tomtunguz.com/most-important-principle-of-fund-raising/
author: "Tomasz Tunguz"
---

<p>The most important principle of start up fund raising is: </p>
<blockquote class="large">
<p>Raise enough money to achieve a set of milestones that will attract a subsequent round of investment from new investors. </p>
</blockquote>
<p>Last week, a founder of a seed stage company came to pitch. When I told him the opportunity wasn’t a fit for us, he asked me what milestones he would need to achieve to raise a Series A - as he was raising a seed round! He was calibrating how much he needed to raise for in his seed to make sure he could raise a Series A. </p>

<p>After we spoke, he drafted <a href="http://tomtunguz.com/financial-planning-for-startups">a financial plan</a> to calculate the size of the seed investment he would need to achieve those milestones and added a reasonable cash buffer. In effect, he reverse-engineered his Series A. </p>

<p>This is the same process investors follow when investing in a company. During the term sheet negotiations, VCs and founders discuss the size of the investment and the corresponding milestones the company will be able to accomplish with more or less cash. Like founders, investors are concerned about follow-on fund raising risk and reverse-engineer the next round to mitigate that risk.</p>

<p>The long term success of a venture-backed startup hinges on the ability of the founding team to raise follow on capital to finance research, fuel product development, discover product market fit and ultimately scale sales and marketing. To minimize financing risk, raise a seed that will enable you to raise an A. Raise an A to raise a Series B and so on. </p>

    
