ARR Bridge Calculator

For SaaS CFOs and revenue leaders needing clear visibility into ARR movement and retention metrics

Visualize ARR movement from starting balance through new bookings, expansion, churn, and contraction to ending ARR. Calculate net revenue retention (NRR) and gross revenue retention (GRR) metrics, understand where revenue growth comes from, and model comprehensive ARR bridges for board reporting.

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ARR Bridge Results

Ending ARR

$6.50M

ARR Growth

$1.50M

Net Revenue Retention

100%

Your ARR grew from $5,000,000 to $6,500,000 (30% growth). Your net revenue retention is 100%, indicating strong expansion from existing customers.

ARR Waterfall

Optimize Your ARR Growth

Improve your ARR bridge by focusing on retention (reduce churn and contraction) and expansion (increase upsells and cross-sells). Companies with NRR above 120% typically see accelerated growth from their existing customer base.

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The ARR bridge visualization helps SaaS companies understand the key drivers of revenue growth by breaking down the components of ARR change. Net revenue retention (NRR) above 100% indicates that existing customers are expanding their usage faster than churn and contraction combined, a key indicator of product-market fit. Gross revenue retention (GRR) measures your ability to retain existing revenue without considering expansion, with best-in-class SaaS companies maintaining GRR above 90%.

Understanding the composition of ARR growth is critical for scaling efficiently. Companies with high NRR (above 120%) can grow primarily through existing customer expansion, reducing customer acquisition costs. The balance between new ARR and expansion ARR reveals whether growth is driven by new customer acquisition or upsells to existing customers, informing go-to-market strategy and resource allocation.


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Tips for Accurate Results

  • Track NRR monthly - best-in-class SaaS can achieve strong NRR (expansion > churn)
  • Monitor GRR separately - measures pure retention without expansion masking churn
  • Calculate Quick Ratio: (New + Expansion) / (Churn + Contraction) for growth efficiency
  • Segment ARR bridge by customer cohort and tier for granular insights

How to Use the ARR Bridge Calculator

  1. 1Enter starting ARR (beginning of period, typically month or quarter)
  2. 2Input new bookings (ARR from new customer wins)
  3. 3Enter expansion ARR (upsells, cross-sells, seat growth from existing customers)
  4. 4Input churned ARR (lost customers) and contraction ARR (downgrades)
  5. 5Review calculated ending ARR and verify it matches your actual ending ARR
  6. 6Analyze NRR, GRR, Quick Ratio, and growth composition (new vs expansion %)

Why ARR Bridge Analysis Matters

The ARR bridge reveals the true drivers of SaaS growth that headline ARR numbers mask. A company experiencing strong headline growth could have two completely different stories: healthy diversified growth with substantial new bookings, meaningful expansion, and manageable churn, or growth masked by severe retention problems with high new bookings compensating for significant churn and contraction. The bridge exposes which scenario you face, informing whether to invest in sales, customer success, product, or fix underlying retention issues.

Net Revenue Retention (NRR) and Gross Revenue Retention (GRR) are the most predictive SaaS metrics for valuation and sustainability. NRR = (Starting ARR + Expansion - Churn - Contraction) / Starting ARR. Strong NRR enables hypergrowth with minimal new logo pressure. Moderate NRR can support healthy growth. When NRR shows churn exceeding expansion, companies require heavy new bookings to grow. GRR measures pure retention: GRR = (Starting ARR - Churn - Contraction) / Starting ARR. Higher GRR indicates excellent retention, while lower GRR may be concerning.

The Quick Ratio (New + Expansion) / (Churn + Contraction) measures growth efficiency. A higher Quick Ratio indicates healthy growth where you gain substantially more than you lose. A moderate Quick Ratio is acceptable but growth requires more effort. A lower Quick Ratio means you are losing revenue faster than gaining it relative to scale, indicating fundamental business issues. Public SaaS companies at scale typically have strong Quick Ratios, while early-stage companies often see lower ratios as they find product-market fit.


Common Use Cases & Scenarios

Early-Stage SaaS

Startup finding PMF with high churn but strong new bookings

Inputs:
  • Starting ARR:$5,000,000
  • New Bookings:$3,500,000
  • Expansion ARR:$400,000
  • Churned ARR:$750,000
  • Contraction ARR:$150,000
Expected Results:

Substantial ending ARR growth, moderate NRR and GRR, healthy Quick Ratio

Growth-Stage SaaS

Scaling company with improving retention and expansion

Inputs:
  • Starting ARR:$25,000,000
  • New Bookings:$12,000,000
  • Expansion ARR:$3,500,000
  • Churned ARR:$2,000,000
  • Contraction ARR:$500,000
Expected Results:

Significant ending ARR growth, strong NRR above baseline, excellent GRR, strong Quick Ratio

Mid-Market SaaS

Established SaaS with strong expansion motion

Inputs:
  • Starting ARR:$80,000,000
  • New Bookings:$24,000,000
  • Expansion ARR:$12,000,000
  • Churned ARR:$3,500,000
  • Contraction ARR:$500,000
Expected Results:

Considerable ending ARR growth, strong NRR with expansion exceeding churn, very high GRR, excellent Quick Ratio

Enterprise SaaS

Public SaaS with best-in-class metrics

Inputs:
  • Starting ARR:$300,000,000
  • New Bookings:$85,000,000
  • Expansion ARR:$45,000,000
  • Churned ARR:$6,000,000
  • Contraction ARR:$4,000,000
Expected Results:

Exceptional ending ARR growth, outstanding NRR with strong expansion, near-perfect GRR, exceptional Quick Ratio


Frequently Asked Questions

What is the difference between NRR and GRR?

GRR (Gross Revenue Retention) measures pure retention: how much ARR you keep from existing customers excluding expansion. Lower GRR indicates revenue lost to churn and contraction. NRR (Net Revenue Retention) includes expansion: strong NRR means expansion exceeded churn. NRR can exceed 100%, GRR cannot. Both metrics together show the full retention story.

What NRR should we target for our stage?

Best-in-class companies achieve strong NRR with expansion-driven growth. Good NRR shows expansion offsetting most churn. Acceptable NRR may show slight net contraction. Lower NRR can indicate significant retention challenges. Early-stage companies often see lower NRR while finding PMF, and should improve as they mature. Enterprise SaaS typically targets higher NRR levels.

How do we improve our Quick Ratio?

Increase numerator (new + expansion): accelerate sales, improve expansion programs, add new products for cross-sell. Decrease denominator (churn + contraction): improve onboarding, customer success, product value. Most efficient gains come from reducing churn and increasing expansion since existing customers have zero CAC. Aim for a healthy Quick Ratio that demonstrates efficient growth.

Should we focus on new bookings or expansion?

Both, but expansion often has better economics. Expansion has zero CAC, shorter sales cycles than new logos, and higher win rates. Companies with strong NRR can achieve substantial growth from existing customers alone. That said, new bookings expand total addressable market and customer base for future expansion. A balanced approach typically includes meaningful contributions from both new customer acquisition and expansion.

How often should we calculate the ARR bridge?

Monthly for internal management (track trends, early warning signs). Quarterly for board reporting (aligns with business reviews). Annually for strategic planning and valuation analysis. Leading SaaS companies review ARR bridge in weekly revenue meetings to monitor metrics like NRR, churn, and Quick Ratio in real-time.

What causes NRR to change over time?

NRR can improve from: product stickiness (integrations, data lock-in), expansion programs (CS-led upsell, product-led growth), multi-product strategy (more to expand into), and moving upmarket (larger customers may expand more). NRR can decline from: economic downturns (budget cuts), competitive pressure, product quality issues, or pricing misalignment with value.


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