MRR Growth Rate — why YC looks for 5-7% MoM
MRR Growth Rate — why YC looks for 5-7% MoM
Y Combinator has an internal benchmark that Paul Graham repeats in every office hours:
> "A startup is a company designed to grow fast. We typically look for 5-7% week-over-week revenue growth at YC. If you're doing 1% — that's a start."
It's a formal standard. If you're a YC applicant, it's the first number in your application.
The formula
> MRR Growth Rate (MoM) = (MRR_end − MRR_start) / MRR_start × 100%
Example: $80k → $88k = (88−80) / 80 = 10%.
Annualized via compounding:
Annual growth = (1 + monthly)^12 − 1
- 5% MoM → 79% annual
- 10% MoM → 213% annual
- 15% MoM → 435% annual
- 20% MoM → 791% annual
Compounding makes it brutal — each extra 1pp MoM ≈ +50% annual at scale.
Benchmarks by stage
| Stage | Healthy MoM | Great | ||
|---|---|---|---|---|
| Pre-PMF | Variable | Any stable number | ||
| Seed (post-PMF) | 15-20% | 25%+ | ||
| Series A | 10-15% | 20% | ||
| Series B | 7-10% | 12% | ||
| Series C+ | 5-7% | 10% | ||
| Public SaaS | 2-3% MoM (= 30-50% YoY) | 5%+ |
T2D3 — the Stripe / Bessemer standard
T2D3 = Triple, Triple, Double, Double, Double ($1M ARR → $100M in 5 years):
| Year | ARR | YoY | ||
|---|---|---|---|---|
| Year 0 | $1M | — | ||
| Year 1 | $3M | 3× (triple) | ||
| Year 2 | $9M | 3× (triple) | ||
| Year 3 | $18M | 2× (double) | ||
| Year 4 | $36M | 2× | ||
| Year 5 | $72M | 2× |
- Year 1-2 (3× annual) = ~9.5% MoM
- Year 3-5 (2× annual) = ~6% MoM
T2D3 is the path to IPO. Top-tier VCs believe companies below this pace won't reach $100M ARR.
YC's "5-7% WoW" translated
5-7% per WEEK = 23-32% per MONTH = 1300-2900% per YEAR.
This is only for early stage, usually $0-$100k MRR. Once you cross $100k MRR — switch to MoM tracking.
How to accelerate MRR Growth — 5 levers
1. Channel-market fit > product-market fit at growth stage
1 working channel at scale > 5 mediocre ones. Find yours:- B2B SaaS: outbound sales, content+SEO, paid social ABM
- PLG / freemium: viral loops, community, integrations
- E-commerce: paid social, influencer, retargeting
Don't dilute — double down on one channel until ROI < 1x.
2. Annual → instant +5-15% MRR
Switching pricing to annual prepay:- Mathematically raises recurring revenue
- Cuts churn ×12
- Cash forward
A −15% discount for annual in exchange for a 12-month commit = a no-brainer for the customer.
3. Pricing review every 12 months
+10-15% price = +10-15% MRR within 3 months (after rollout to existing customers + new sign-ups).If you haven't raised price in 18 months — raise it now.
4. Expansion revenue ≠ new customer revenue
Existing-customer expansion has a CAC of ~$0:- Seat-based pricing (scales with team)
- Usage-based (scales with usage)
- Tiered upgrades
NRR >115% gives ~10% growth "for free" (without new customers).
5. ICP focus — drop low-fit segments
Counter-intuitive: cut 30% of users (low-fit, high-churn, support-heavy) → free up team capacity for the high-fit segment → faster growth there."Less is more" actually works in B2B SaaS.
Real-world examples
Slack 2014:
- $0 → $1M ARR in 5 months (post-launch)
- Average MoM ~100% (founders' effect)
Notion 2018:
- $1M → $10M ARR in 18 months
- Average MoM ~14%
Figma 2017-2018:
- $1M → $4M in 12 months
- Average MoM ~12%
These are all outliers. Healthy growth for post-PMF SaaS = 10-15% MoM. If you're doing 20%+ sustainably — you're on a unicorn pace.
When MoM Growth is MISLEADING
1. Small base — $5k → $7k = 40% MoM. Not a long-term indicator.
2. One big contract — a Q4 enterprise deal distorts trailing months.
3. Annual contracts billed monthly vs upfront — a pricing switch affects reporting.
4. Promotions / discounts — Black Friday MoM ≠ normal.
Use a trailing 3-month average MoM for a normalized picture.
The link to a YC application
The YC application form has a literal question: "What is your MoM growth rate?"
They don't filter on the number, but 5-7% MoM = a strong signal. Less — you need to explain (long sales cycle, recent launch, etc.). More — instant attention.
Bottom line
MRR Growth Rate is the pulse of the company. Measure it weekly until $100k MRR, monthly after. Know your trailing 3-month average. Aim for 10%+ MoM for early-stage SaaS, and a T2D3 path to $100M ARR is realistic.
Calculate your MRR Growth below + benchmark + projection.
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Further resources
- /en/mrr — MRR calculator
- /en/arr — ARR calculator (MRR × 12)
- /en/ruleOf40 — Rule of 40 (growth — half of the formula)
- /en/blog/rule-of-40-saas — Rule of 40 deep dive
- YC Library — Growth