An investor wants a pro-rata right. What am I giving up and is it standard?
The short answer
A pro-rata right lets the investor put more money in at your next round to keep their ownership percentage, and for a serious early backer this is standard and fine to grant. The problem starts when many small angels all hold pro-rata rights and crowd out the room your Series A lead needs, so cap it to your meaningful investors or use a side letter that gives it only above a cheque threshold. Grant it freely to your best believers, guard it against a long tail of tiny cheques.
Go deeper, your way
3 hand-picked resources, 3 link-checked. Pick how you want to dig in.
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Why we picked it
This is the piece that names the exact failure mode in your question: when your early investors all take their pro-rata, they fill most of a Series B and leave room for only five to ten percent for a new lead, right when a growth lead wants fifteen to twenty. It then gives you the fix in plain terms, cap the right to investors holding one to two percent or more, grant full rights to your lead, and use sunset or pay-to-play mechanics so a long tail of tiny cheques never clogs the round.
Pro-rata lets an existing backer keep their percentage by buying into your next round, and for a serious lead it is completely standard
The danger is aggregate: many small holders each taking pro-rata can consume the allocation your Series A or B lead needs
Scope it with a major-investor threshold (roughly 1 to 2 percent ownership) plus sunset and pay-to-play clauses so the right stays with your real believers
Why we picked it
The primary source for the SAFE itself, plus YC's plain-English primer explaining post-money mechanics. Use the official document, not a random copy, and read the primer before you sign.
Why we picked it
This is the actual term sheet most Indian angels and seed funds put in front of you, hosted on the official Startup India portal, and Clause 2.2 (Pre-emptive Rights) is precisely the pro-rata language you will be asked to sign: 'The Investors shall have a pro rata right to participate in any future issue of shares... to retain their shareholding on a fully diluted basis... on the same terms and conditions including price as offered to such third party.' Read it so you recognise the clause on sight, and note it grants the right to 'the Investors' broadly, which is exactly the wording you should narrow to a major-investor threshold before you countersign.
In the standard Indian term sheet the pro-rata right shows up as a 'Pre-emptive Rights' clause tied to future share issues on the same terms and price
The default wording grants it to all investors on the sheet, so you must edit in a cheque-size or ownership threshold to avoid the small-cheque pile-up
Seeing the real CCPS clause (not a US SAFE analogy) lets you negotiate the exact sentence an Indian angel will hand you