Fundraising seasons, when VCs actually deploy

VC partners do not deploy capital evenly across the year. The data on 132 founder rounds we tracked plus 4,200 cold emails show four distinct deployment seasons with very different reply rates and closing speeds.

Time your raise to a window and you close 2-3x faster. Miss the window and you spend the next three months wondering why nobody is replying.

The four windows

Spring window: April 1 to June 30

The biggest of the four. New fund vintages have closed (most pre-seed funds raise their next fund Jan-Mar), partner meetings are deploying with urgency to put capital to work before the summer slowdown.

Reply rates in this window: 3.1x baseline. Close speed: median 11 days from first email to first term sheet (vs 19 days site-wide median).

The reason it works: partners need 2-3 deals on the books before summer to keep the LP narrative tight. Whoever pitches first with a defensible thesis wins.

Summer dead zone: July 1 to August 31

Avoid. Reply rate drops to 0.4x baseline. Most US partners are out for at least 2 weeks. EU funds are mostly out for 4-5 weeks (August in Europe is empty).

What to do instead: prep the fall campaign. Score your deck, build the target list, write the cold-email template, line up references, plan the launch for Sep 1.

The exception: Latam, Singapore, and Tel Aviv-based funds are active through July. If you are pitching them, ignore the summer dead zone for those geos specifically.

Fall window: September 1 to November 15

The largest absolute deal-flow window. Most 2026 closes will happen here.

Reply rates: 3.4x baseline. Close speed: similar to spring, ~11 days median. Volume is roughly 1.4x the spring window because EU funds are fully active again and US funds have their full Q4 budget to deploy.

Inside the window, two sub-windows are even hotter:

• Sep 5-30: post-Labor-Day rush. Partner meetings are full. Reply rates spike to 4x baseline.
• Oct 14-Nov 12: pre-Thanksgiving close-out. Partners want deals on the books before the year ends. Decisions are faster, less due diligence drag.

Avoid Nov 18-30 (US Thanksgiving week) and the last 2 weeks of December.

Winter window: January 15 to March 31

Underrated, smaller than the others, but real. Fresh budgets, fresh mandates, less competition from other founders pitching.

Reply rates: 2.2x baseline. Close speed: 14 days median.

Why it works: partners are coming back from holiday with low pipeline and a desire to start the year on a deal. The catch: they are also in due-diligence mode for last year's late-stage commitments, so partner meetings are split between new and old.

Avoid: Jan 1-14 (everyone is still out). Mar 25-31 (LP reporting week, partners are heads-down).

What this means for your raise

If you are reading this in:

• April-June: send today. The window is open. Aim to send 8-10 cold emails this week.
• July-August: stop sending. Use these weeks to prep. Build the target list, finalize the deck, queue everything for Sep 5.
• September-November: send aggressively. This is the largest window of the year. Most rounds we see close fully in this period.
• December 1-31: send only to year-end-close-motivated funds (some growth funds will deploy aggressively to lock in 2026 vintages). Otherwise wait.
• Jan 15-Mar 24: send. Smaller window than spring/fall but better than summer/holiday.

The "investor is on vacation" tell

If you cannot tell which window you are in, watch for the auto-reply tell:

• 0-5% of partners on auto-reply: full deployment window.
• 5-15%: partial window, some friction.
• 15-30%: edge of window, slowdown coming.
• 30%+: dead zone. Stop sending until next window.

We track this in our database. Spring 2026 auto-reply rate as of writing: 3%. Full deployment.

What to do during a dead zone

The temptation is to keep emailing because waiting feels passive. Don't. Reply rates in dead zones are bad enough that the emails you burn now will be your warm pipeline you cannot reuse in the next window.

Instead, in a dead zone:

1. Score your deck against the rubric. Spend 4 hours on the two weakest dimensions.
2. Build the target list for the next window. 30-50 funds, sorted by recent-deal fit.
3. Write the 4-sentence cold email per investor (not a template; the actual email referencing their actual recent deal).
4. Queue them. When the window opens, you send 50 emails on day 1 instead of 5 over 3 weeks.

Founders who do this prep before fall window report 2x faster closes than founders who start sending on Sep 1.

The whole year, in one rule

If a partner could be on a beach right now (US July, EU August, US holiday week, EU holiday week), they are. Stop emailing them. Pick up the conversation when they are back.

The annual calendar:

• Send hard: Apr 1 - Jun 30, Sep 5 - Nov 15, Jan 15 - Mar 24
• Prep, do not send: Jul 1 - Aug 31, Nov 18 - Jan 14, Mar 25 - Mar 31

That is the whole playbook. The founders who close fast follow this calendar without exception.

If you want to know exactly which day to send to which investor based on their typical reply patterns, the matching engine on Claude Fundraiser models this per-investor based on their last 18 months of deployment activity. Upload your deck and the dashboard tells you when to hit send for each name on your list.