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Key takeaways
- A valuation cap sets the maximum company valuation at which a SAFE converts, giving the investor a better (lower) price per share when the priced round exceeds the cap.
- A discount rate applies a fixed percentage reduction to the priced round's share price, regardless of how high the company's valuation grows.
- When a SAFE includes both a cap and a discount, the investor converts at whichever mechanism produces the lower price per share. They do not receive both benefits simultaneously.
- There is a specific round valuation, called the crossover point, above which the cap produces a better outcome for investors than the discount, and below which the discount does.
- For a typical $5M cap with a 20% discount, the crossover falls at a $6.25M pre-money valuation. Any Series A above that valuation means the cap is driving conversion, not the discount.
- Y Combinator's current standard templates do not include a combined cap-and-discount SAFE. YC's stated position is that it did not encounter situations where the combined form was the preferred choice.
- Founders who model their SAFE terms against realistic growth projections before signing are better positioned to identify which term will actually determine their dilution.
A SAFE note (Simple Agreement for Future Equity) gives an early investor the right to convert their investment into equity during a future priced round. The conversion price, meaning the price per share at which the investor's capital converts into equity, is determined by one or both of two terms: the valuation cap and the discount rate.
How valuation caps and discount rates set the conversion price
The valuation cap sets the maximum company valuation at which the SAFE will convert. If the Series A prices the company above the cap, the investor converts as though the company were worth the cap amount, not the actual round valuation. This produces a lower price per share than new investors pay, and therefore more shares per dollar invested. A $5M cap on a SAFE that converts at a $15M Series A means the investor pays one-third of the price per share that new investors pay.
The cap conversion price is calculated as:
Cap conversion price = valuation cap ÷ pre-money shares outstanding
The discount rate applies a fixed percentage reduction to the priced round's share price, regardless of valuation. A 20% discount means the SAFE holder pays 80 cents for every dollar new investors pay per share. If the Series A prices shares at $2.00, the SAFE holder converts at $1.60. Unlike the cap, the discount does not scale with the company's growth, the investor's advantage is fixed at the agreed percentage.
The discount conversion price is calculated as:
Discount conversion price = round price per share × (1 − discount %)
The "lower of the two" rule applies when a SAFE includes both a cap and a discount. At conversion, both prices are calculated, and the investor converts at whichever is lower, meaning whichever produces more shares. The two mechanisms do not stack. A founder who describes a SAFE as offering "a $5M cap and a 20% discount" is describing one benefit at conversion, not two cumulative ones.
The valuation at which cap and discount produce the same conversion price
Because the cap and discount produce their conversion prices through different formulas, there is a specific round valuation at which both mechanisms produce the same price per share. Above that valuation, the cap gives investors a better outcome. Below it, the discount does.
Let’s say an investor holds a SAFE with a $5M valuation cap, a 20% discount, and assumes a pre-money share count of 10 million shares before the Series A.
The cap-implied conversion price is always $0.50 per share ($5M cap ÷ 10M shares), regardless of what the Series A values the company at.
The discount-implied conversion price depends on the round's share price, which itself depends on the pre-money valuation. Specifically:
Round price per share = pre-money valuation ÷ 10M shares
Discount price = round price × 0.80 (after applying the 20% discount)
The crossover occurs when: cap price = discount price
$0.50 = (pre-money valuation ÷ 10M) × 0.80
Solving: pre-money valuation = $0.50 × 10M ÷ 0.80 = $6.25M
At a $6.25M pre-money valuation, both mechanisms produce the same conversion price. Below $6.25M, the discount gives the investor more shares. Above $6.25M, the cap does.
The general formula for the crossover valuation:
Crossover pre-money valuation = cap ÷ (1 − discount %)
For a $5M cap and 20% discount: $5M ÷ 0.80 = $6.25M
For a $6M cap and 15% discount: $6M ÷ 0.85 = $7.06M
This formula assumes a pre-money SAFE, where the cap and the share price base use the same pre-money share count. Post-money SAFEs use a different capitalization base that includes the SAFE itself at conversion, which affects the precise crossover calculation. The post-money treatment is covered in the section below.
This means if you expect your Series A to price the company above $6.25M (in the first example), the cap is the term that determines investor conversion and therefore your dilution. The discount is effectively inactive at any outcome above the crossover.
The crossover point shifts with every change to the cap, discount, or share count, so the calculation is worth running against your actual round assumptions before signing. EquityList's SAFE calculator lets you input your cap and discount terms and find the crossover point for your specific round assumptions.
How cap, discount, and the lower-of rule play out at different Series A valuations
The following example uses a single SAFE with consistent terms across three different Series A outcomes to show how cap, discount, and the "lower of the two" rule each play out.
SAFE terms: $500,000 investment, $5M valuation cap, 20% discount
Pre-money shares outstanding at Series A: 10 million
Scenario 1: Series A at $4M pre-money valuation
Round price per share = $4M ÷ 10M = $0.40/share
Cap price = $5M ÷ 10M = $0.50/share
Discount price = $0.40 × 0.80 = $0.32/share
At this outcome, the discount produces a lower price per share than the cap. If the SAFE has both terms, the investor converts at $0.32. If only the cap is present, conversion is at $0.40. If only the discount is present, conversion is also at $0.32.
Shares received under each structure:
At low outcomes, the discount is the active term. With a cap-only SAFE, the cap does not apply when the round prices below it, so the investor converts at the same price as new investors. A discount-only SAFE gives the investor more shares in this scenario because the discount still applies regardless of how the round is priced.
Scenario 2: Series A at $12M pre-money valuation
Round price per share = $12M ÷ 10M = $1.20/share
Cap price = $5M ÷ 10M = $0.50/share
Discount price = $1.20 × 0.80 = $0.96/share
The cap produces a significantly lower price. This is above the $6.25M crossover, so the cap is the active term.
At this outcome, a discount-only SAFE gives the investor roughly half the shares of a cap-only SAFE. The discount is doing far less work than a founder might assume.
Scenario 3: Series A at $25M pre-money valuation
Round price per share = $25M ÷ 10M = $2.50/share
Cap price = $5M ÷ 10M = $0.50/share
Discount price = $2.50 × 0.80 = $2.00/share
At a strong outcome, the cap delivers four times as many shares as the discount. When a company grows well above the cap, the discount becomes structurally irrelevant.
How to use the crossover valuation when negotiating SAFE terms
If you expect the next funding round to price above your cap: the discount is not adding meaningful investor protection. An investor who insists on a 20% discount alongside a tight $5M cap on a company expected to raise at $15M is asking for redundant terms: the cap already drives conversion at every plausible outcome above the crossover.
If the round outcome is genuinely uncertain: a discount-only SAFE is simpler and may be more appropriate. It rewards early investors proportionally without requiring agreement on a valuation ceiling, which can itself become an anchoring problem in future negotiations. If both parties agree it is too early to estimate a reasonable valuation, the discount variant is more honest about that uncertainty than a cap that implies a ceiling on the company's worth.
Why Y Combinator does not offer the combined variant as a standard template
Y Combinator's current template library includes a cap-only variant, a discount-only variant, and an MFN (Most Favored Nation) variant. The combined cap-and-discount form is not on the YC template page.
In the YC Post-Money Safe User Guide, YC states that its recommendation was to issue either the valuation cap variant or the discount variant, and that it did not encounter situations where the combined form was the preferred choice. The combined form is still used in practice; founders negotiate it with counsel. Its absence from the YC library reflects a template decision, not a prohibition.
The MFN variant is worth noting for completeness: a MFN SAFE carries no cap or discount at signing, but entitles the investor to adopt the most favourable terms offered to any subsequent SAFE investor. It is most useful at the earliest stages, where neither party can justify a specific valuation ceiling.
How post-money SAFEs change the conversion math
The examples above calculate the cap conversion price using the pre-money share count before the Series A, which reflects how pre-money SAFEs operate. Post-money SAFEs, which have been the Y Combinator standard since 2018, calculate the investor's ownership percentage differently: the SAFE is treated as already part of the company's capitalization at conversion, fixing the investor's percentage regardless of other SAFEs issued later.
The cap vs discount mechanics described in this post apply to both structures, but the dilution consequences differ. On a post-money SAFE, each new SAFE issued at the same cap dilutes founders rather than other SAFE holders, which compounds the effect of a tight cap and shifts the crossover calculation. For a full treatment of how to model post-money SAFE stacking, see our post-money SAFE modeling guide.
When to choose a cap, a discount, or both
A valuation cap protects investors from the scenario where the company grows far beyond the SAFE's implied valuation before they convert. A discount rate protects investors from the scenario where the round prices modestly and the cap provides no benefit. Each term is designed for a different outcome, which is why the crossover valuation determines which one is actually doing work in any given scenario.
Founders who understand the crossover for their specific terms can identify before signing whether the cap or the discount will drive conversion at their expected Series A outcome. EquityList's SAFE calculator lets you input your cap and discount terms and project conversion outcomes across different round valuations, so you can see where the crossover falls and what the dilution impact looks like at each outcome.
FAQs on valuation cap vs discount cap
What is the difference between cap rate and discount rate?
In the context of SAFE notes, a valuation cap sets the maximum company valuation at which the SAFE will convert into equity. A discount rate applies a fixed percentage reduction to the priced round's share price. The two are separate mechanisms, and when both are present in a single SAFE, the investor converts at whichever produces the lower price per share.
