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MRR & ARR Growth Projection

Project your SaaS Monthly Recurring Revenue and Annual Recurring Revenue over 12 months, factoring in churn rate, new growth, and the compounding effect of net revenue retention.

MRR & ARR Growth Projection

Project your SaaS revenue over 12 months. Net growth compounds monthly — churn silently drains your base while new revenue fills it.

$

Monthly Recurring Revenue today

%

New bookings as % of MRR

%

Cancellations as % of MRR

Net Monthly Growth Rate = 10% − 3% churn = +7.0% / month
Current ARR
$120,000
MRR × 12 run rate
Current MRR
$10,000
starting point
Month 12 MRR
$22,522
projected
Month 12 ARR
$270,263
projected run rate
12-Month MRR Projection
MonthMRRARR Run RateGrowth vs Start
Month 1$10,700$128,400+7.0%
Month 2$11,449$137,388+14.5%
Month 3$12,250$147,005+22.5%
Month 4$13,108$157,296+31.1%
Month 5$14,026$168,306+40.3%
Month 6$15,007$180,088+50.1%
Month 7$16,058$192,694+60.6%
Month 8$17,182$206,182+71.8%
Month 9$18,385$220,615+83.8%
Month 10$19,672$236,058+96.7%
Month 11$21,049$252,582+110.5%
Month 12$22,522$270,263+125.2%

Practical Example

$10,000 MRR | 10% growth | 3% churn:
Net growth = 10% − 3% = +7%/month
Month 12 MRR = $10,000 × (1.07)¹² = $22,522
Month 12 ARR = $22,522 × 12 = $270,263

💡 Field Notes

  • ARR is a run rate, not cash collected: ARR = current MRR × 12. It represents what you'd earn if nothing changed. A company at $10K MRR in December has a $120K ARR, even if they only collected $60K year-to-date.
  • Churn is exponential erosion: 3% monthly churn compounds to (1−0.03)¹² = 69.4% annual retention — you lose 30.6% of your customer base every year. Even a 1% reduction in monthly churn dramatically changes 36-month projections.
  • Net Revenue Retention (NRR) > 100% is the goal: If existing customers expand faster than others churn, you achieve negative churn — revenue grows even with zero new customer acquisition. Snowflake maintained 130%+ NRR for years.
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What is Subscription Revenue Forecasting and Net Growth?

Projecting MRR requires understanding the compounding nature of subscription revenue. High gross growth means nothing if your churn rate is silently draining the bottom line. The net growth rate determines the entire trajectory of the business — a company growing at 10% but churning 9% will plateau and eventually collapse, while a company growing at 7% with 1% churn is building an unstoppable compounding machine that scales to dominance.

Mathematical Foundation

Compounding Net MRR Growth
MRRMonth n=MRRStart×(1+NetGrowth%)nMRR_{Month\ n} = MRR_{Start} \times (1 + NetGrowth\%)^{n}
MRRStartMRR_{Start}= Current Monthly Recurring Revenue — all contracted, predictable monthly subscription revenue. Excludes one-time fees, professional services, and variable usage overages.
NetGrowth%NetGrowth\%= New Revenue Growth % minus Churn %. If new MRR growth is 10% and churn is 3%, net monthly growth is +7%. This net rate is applied as the exponent base.
nn= Number of months projected. The exponent creates compounding — each month's growth applies to the already-grown base, not the original starting value.
Annual Recurring Revenue (ARR) Run Rate
ARR=MRRCurrent×12ARR = MRR_{Current} \times 12
MRRCurrentMRR_{Current}= The most recent month's MRR figure used as the annualized run rate. ARR is NOT the sum of 12 months of revenue — it is a forward-looking projection of what the next 12 months would generate if the current MRR rate held constant.

Laws & Principles

  • ARR is a Run Rate, Not Collected Cash: A company with $10K MRR in December has a $120K ARR run rate. This means it is tracking to collect $120K over the next 12 months if MRR holds — not that it collected $120K during the current year. ARR is a forward-looking metric used for SaaS valuation multiples (commonly 5-15x ARR depending on growth rate and capital efficiency).
  • Churn Compounds Exponentially Against You: A 3% monthly churn rate means (1 - 0.03)^12 = 69.4% annual retention — 30.6% of the customer base churns every single year. Reducing from 3% to 2% monthly churn increases annual retention from 69.4% to 78.5%, a massive improvement that compounds into dramatically different 3-year revenue trajectories.
  • Net Growth Rate Determines Ceiling: With any positive churn and finite growth, the MRR trajectory will eventually plateau asymptotically at a ceiling of (New MRR Added per Month) / (Churn Rate). A company adding $5,000 in new MRR/month with 5% churn will plateau at $5,000 / 0.05 = $100,000 MRR — it cannot grow past that ceiling without either increasing new growth or reducing churn.
  • Negative Net Churn Is The Goal: Elite SaaS companies like Snowflake and Datadog achieve Net Revenue Retention over 120% — meaning existing customers alone drive MRR growth even before adding a single new customer. Expansion revenue (upsells, seat additions, usage growth) exceeds gross churn, creating a self-fueling compounding engine.

Step-by-Step Example Walkthrough

" A SaaS company starts at $10,000 MRR. They grow new revenue at 10% per month, but lose 3% to churn. "

  1. Net Monthly Growth Rate: 10% new - 3% churn = +7% net.
  2. Month 6: $10,000 x (1.07)^6 = $10,000 x 1.5007 = $15,007 MRR.
  3. Month 12: $10,000 x (1.07)^12 = $10,000 x 2.2522 = $22,522 MRR.
  4. ARR at Month 12: $22,522 x 12 = $270,263.
  5. Sensitivity: At 5% churn (net growth = 5%), Month 12 MRR = $10,000 x (1.05)^12 = $17,959. ARR = $215,508.
Final Result: The 2% churn difference (3% vs 5%) costs $55,000 in annual run rate by month 12. Over 24 months the divergence is catastrophic. This is why churn reduction compounds so powerfully — every percentage point saved multiplies across the entire future revenue trajectory.

Quick Answer: What does this MRR & ARR Growth Calculator project?

The MRR & ARR Growth Calculator models the 12-month compounding trajectory of a subscription business's Monthly Recurring Revenue by applying your net growth rate (new revenue growth minus churn) to a starting MRR base. It outputs an ARR run rate for each month, showing exactly how much the churn rate is costing you in future revenue — and what happens to the ceiling if you reduce it.

The Compounding Revenue Formula

Net Monthly Growth Rate

Net Growth % = New Revenue Growth % − Monthly Churn %

MRR at Month N

MRR(n) = Starting MRR × (1 + Net Growth %)^n

⚠ The Asymptotic Revenue Ceiling

Any positive churn rate creates a mathematical revenue ceiling that MRR cannot break through. If you add $5,000 of new MRR per month but churn destroys 5% of your base monthly, you will plateau at $100,000 MRR forever. Scaling sales spend cannot solve a ceiling caused by churn — it only postpones the plateau while burning capital faster.

SaaS Growth Trajectory Scenarios

✓ The Compounding Machine (Low Churn)

How 1% churn creates an unstoppable growth curve.

  1. Setup: A B2B workflow automation platform. Starting MRR = $50,000. New growth = 8%/month. Churn = 1%/month. Net growth = 7%.
  2. Month 12: $50,000 x (1.07)^12 = $112,610 MRR. ARR = $1,351,320.
  3. Month 24: $50,000 x (1.07)^24 = $253,612 MRR. ARR = $3,043,344.
  4. Key Insight: At 1% churn, the business roughly doubles ARR every 12 months. Over 3 years it grows 8x from $600K to nearly $4.6M ARR with no change in growth rate — pure compounding.

✗ The Churning Treadmill (High Churn)

Growing fast but running in place due to a leaky base.

  1. Setup: A consumer app. Starting MRR = $50,000. New growth = 12%/month (impressive!). But churn = 11%/month. Net growth = only 1%.
  2. Month 12: $50,000 x (1.01)^12 = $56,341 MRR. ARR = $676,092.
  3. Month 24: $50,000 x (1.01)^24 = $63,464 MRR. ARR = $761,568.
  4. Catastrophe: Despite 12% gross growth — the kind that would draw investor excitement — the company has barely moved. After 24 months of hustling, ARR grew by only $161K. The leaky bucket consumed nearly all growth.

SaaS Churn Benchmarks by Segment

SaaS Segment Healthy Monthly Churn
Enterprise B2B (>$50K ACV)0.5% - 1.0%
Mid-Market B2B ($5K-$50K ACV)1.0% - 2.0%
SMB B2B (<$5K ACV)2.5% - 4.0%
B2C Consumer Apps5.0% - 15%+

Revenue Growth Strategy Directives

Do This

  • ✓Model your MRR ceiling before scaling sales. Calculate your asymptotic revenue ceiling (Monthly New MRR / Churn Rate) before hiring your next AE. If your ceiling is $200K MRR and you are already at $180K, you are about to throw sales budget at a mathematical wall. Fix churn first, then scale acquisition.
  • ✓Build expansion revenue to escape the churn ceiling. Any upsell or seat expansion that adds revenue from existing customers directly improves your Net Revenue Retention and pushes the asymptotic ceiling higher. Even a small 1-2% monthly expansion rate can transform a plateauing business into a compounding machine.

Avoid This

  • ✗Never exclude logo churn from MRR projections. Some founders model only revenue churn (dollar value of lost MRR) and ignore logo churn (number of customers lost). While dollar churn matters more for revenue modeling, logo churn creates a market perception problem — having 50% of your customers churn annually makes references, case studies, and expansion impossible regardless of ARPU.
  • ✗Do not conflate MRR with bookings or billings. Bookings are signed contracts. Billings are invoiced amounts. MRR is the recognized contracted recurring revenue earned in a month. These three figures diverge significantly with annual prepaid contracts, multi-year deals, and payment terms. Mixing them destroys the accuracy of any growth model.

Frequently Asked Questions

What is the difference between MRR and ARR?

MRR (Monthly Recurring Revenue) is the contracted, predictable monthly revenue base — it changes each month as customers are added, churned, or expanded. ARR (Annual Recurring Revenue) is simply MRR multiplied by 12 to represent the forward-looking annual run rate. ARR is not a trailing 12-month sum — it is a point-in-time projection of what the next 12 months would generate if your current MRR level held constant. Investors and buyers use ARR multiples (e.g., '8x ARR') to value SaaS companies.

Why does net growth rate matter more than gross growth rate?

Because net growth rate is the exponent in the compounding formula — gross growth rate is irrelevant to long-term trajectory without subtracting churn. A company with 20% gross growth and 18% churn has a net rate of 2% and will barely grow. A company with 8% gross growth and 1% churn has a net rate of 7% and will double ARR every 10 months. The compounding formula magnifies the net rate relentlessly over time, making gross growth rate a vanity metric without its counterpart.

What is Net Revenue Retention (NRR) and how does it relate to MRR growth?

Net Revenue Retention measures what happened to a specific cohort of customers' revenue over 12 months, including upsells, downgrades, and churn. NRR above 100% means your existing customers generated more revenue this year without any new customer acquisition — called 'negative churn.' If NRR is 115%, every $100 of beginning MRR in a cohort became $115 by year-end purely from expansions exceeding churns. This is the most powerful growth dynamic in SaaS — it means your MRR grows even if your sales team closes zero new deals.

How do investors use ARR multiples to value SaaS companies?

Private SaaS companies are typically valued at 5-15x forward ARR, depending on the annual growth rate and net retention. A company growing ARR at 100%+ annually with NRR above 120% can command 15x or higher. A company growing 20% per year with 90% NRR might receive 5-7x. The multiple rewards growth rate, gross margin, churn profile, and market size. Public SaaS companies trade at 6-12x ARR on average, with the highest-growth names commanding 20-30x during periods of risk-on market sentiment.

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