Short answer

Send a short monthly email: headline metrics, highlights, lowlights, what you are working on next, and specific asks. Keep it the same format every month, include numbers even when they are bad, and send it to current investors and promising prospects. Consistency is what builds trust.

Key facts

What is the template?

Subject: [Company] update, [Month Year]: [one-line headline]

  1. Headline: one sentence on the month.
  2. Metrics: 3–5 numbers with month-over-month change.
  3. Highlights: 2–3 wins.
  4. Lowlights: 1–2 problems and what you are doing about them.
  5. Next month: top priorities.
  6. Asks: specific intros, hires or advice.

Who should receive it?

AudienceWhy
Current investorsObligation and follow-on support
Prospective investors who said "too early"Shows progress over time
Advisors and close supportersIntros and help

What should you avoid?

For which numbers to track, see traction metrics before revenue. For the full process, how to raise a pre-seed round.

What does a full example look like?

Subject: Lumen update, September 2026: first paid pilots signed

Headline: We signed our first two paid pilots and cut onboarding time in half.

MetricAugustSeptemberChange
Weekly active teams3852+37%
Week-4 retention41%48%+7 pts
Paid pilots02 (€1,500/month each)new
Runway13 months12 months—

Highlights: two paid pilots with logistics companies; onboarding now takes 9 minutes instead of 20. Lowlights: our first sales hire declined the offer; we are re-running the search. Next month: convert one pilot to an annual contract, ship the reporting module. Asks: introductions to heads of operations at mid-sized logistics firms in Germany or the Netherlands.

Why do updates help you raise?

An investor who reads six consecutive monthly updates has watched you execute. When you open your next round, you are no longer a cold pitch; you are a company they have followed. Many follow-on cheques and introductions come directly from updates, because the asks section gives readers a concrete way to help.

Updates also discipline the team. Choosing the same five numbers every month forces you to decide what matters and to notice when it stops moving.

How do you build the habit?

Keep the tone factual. Overselling in updates backfires when the next month's numbers arrive.

Frequently asked questions

How often should I send investor updates?

Monthly is the most common cadence for early-stage startups.

What should an investor update include?

Key metrics with trends, highlights, lowlights, next priorities and specific asks.

Should I send updates to investors who passed?

Yes, to those who showed interest. Regular progress can turn a pass into a later investment.

How long should an investor update be?

Short enough to read in two minutes.

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Sources and further reading. Y Combinator Library.

Educational material, not legal, tax or investment advice. Rules and figures change; confirm with qualified counsel or a tax adviser in your jurisdiction before acting. Last updated October 6, 2026.