Definition and Core Formula
Two SaaS companies can report the same $100k MRR month after month while being in completely different situations. One is growing and replacing losses with new revenue and expansion. The other is simply flat. Net New MRR is what separates those scenarios. Total MRR does not.
Net New MRR is the net change in monthly recurring revenue over a period. It is the sum of all positive movements minus all losses.
Net New MRR = New MRR + Expansion MRR − Contraction MRR − Churned MRR
There is also a balance-sheet form of the same logic:
Net New MRR = MRR(end of month) − MRR(start of month) − Reactivation MRR
Reactivation is removed in the second formula because it is recovery of previously lost revenue, not new organic growth. If you include it, the growth picture becomes flattered.
The sign matters:
- Net New MRR > 0: the business is growing.
- Net New MRR = 0: gains are being fully offset by losses.
- Net New MRR < 0: the business is shrinking, even if total MRR is still high.
The Four Forces Behind Net New MRR
Net New MRR is not one number in isolation. It is the result of four forces pushing in opposite directions. Managing it means managing each force separately.
(New MRR + Expansion MRR) − (Contraction MRR + Churned MRR) = Net New MRR
High New MRR paired with fast-rising churn is not marketing success. It is a leaky bucket.
New MRR inside Net New MRR
New MRR is always positive, but the absolute number alone means very little. The real value comes from the right cuts.
Useful breakdowns include acquisition channel, plan, geography, and customer segment.
New MRR = organic search + paid ads + referral + direct sales + partner
This is what lets you compare real CAC by channel against later LTV and churn behavior. A referral channel may produce less New MRR at the start but much lower future churn.
Expansion MRR inside Net New MRR
Expansion is the highest-quality component of Net New MRR. It does not require new acquisition spend, it does not increase sales load, and it directly improves NRR.
Expansion MRR = Upsell MRR + Cross-sell MRR + Add-on MRR + Usage-based Expansion MRR
- Upsell MRR: `(new plan − old plan) × seats`.
- Cross-sell MRR: `module price × seats`.
- Add-on MRR: `(new quantity − old quantity) × unit price`.
- Usage Expansion MRR: `MAX(0, actual usage − included limit) × unit price`.
In usage-based pricing, expansion can happen without any formal subscription change. The customer simply grows and consumes more. That is one of the strongest arguments for consumption-based pricing.
Contraction MRR inside Net New MRR
Contraction is the quiet killer of Net New MRR. The customer is still active, so logo churn stays quiet, but revenue is already leaving.
Contraction MRR = Downgrade MRR + Seat Reduction MRR + Usage Reduction MRR + Discount/Credit MRR
- Downgrade MRR: `(old plan − new plan) × seats`.
- Seat Reduction MRR: removed seats × seat price.
- Usage Reduction MRR: `MAX(0, prior usage − current usage) × unit price`.
- Discount/Credit MRR: permanent recurring discounts and credits that reduce the monthly base.
If contraction rises while logo churn stays stable, customers are not leaving. They are repricing the value of your product downward. That is a product problem, not a marketing problem.
Churned MRR inside Net New MRR
Churned MRR = Voluntary Churned MRR + Involuntary Churned MRR
Voluntary churn means the customer chose to cancel. Involuntary churn means payment failed and dunning did not recover the account. In SMB SaaS, involuntary churn can account for a meaningful share of total lost MRR.
This split is mandatory. Product fixes do not solve billing failures, and retry logic does not solve weak product value.
Derived Metrics
Net New MRR Growth Rate
Net New MRR Growth Rate = (Net New MRR(current) − Net New MRR(previous)) / |Net New MRR(previous)| × 100
This tells you whether growth is accelerating or decelerating. The absolute value in the denominator prevents nonsense when the prior period was negative.
Expansion Efficiency
Expansion Efficiency = Expansion MRR / Churned MRR
- < 1: losses are larger than expansion.
- = 1: expansion exactly offsets churn.
- > 1: expansion is covering churn.
- > 1.5: negative churn territory.
Quick Ratio
Quick Ratio = (New MRR + Expansion MRR) / (Churned MRR + Contraction MRR)
- < 1: the business is shrinking.
- 1-2: weak growth.
- 2-4: healthy growth.
- > 4: excellent growth.
Quick Ratio is often more useful than absolute Net New MRR because it measures growth quality. Two companies can add the same net dollars while one is doing it much more efficiently.
Burn Multiple Through Net New ARR
Burn Multiple = Net Cash Burn / Net New ARR = Net Cash Burn / (Net New MRR × 12)
Burn Multiple tells you how much cash is burned to create one dollar of new ARR. The higher Net New MRR is, the more efficient growth becomes.
Magic Number
Magic Number = Net New ARR(quarter) / S&M expense(previous quarter)
This should use Net New ARR, not gross New ARR. Teams that ignore losses and plug in only New ARR overstate sales efficiency.
Common Calculation Mistakes
- Including Reactivation in Net New MRR. Reactivation is recovery, not new growth.
- Using Net New MRR instead of cohort analysis. It is an aggregate and cannot explain cohort retention quality.
- Using the wrong denominator in Growth Rate. Negative prior periods break the naive formula.
- Mixing partial and full periods. Mid-month numbers should be analyzed as run rate.
- Ignoring Contraction. Systems that only track New and Churned MRR systematically overstate growth.
Worked Example with Diagnosis
Starting MRR: $200,000
| Component | January | February |
|---|---|---|
| New MRR | +$20,000 | +$25,000 |
| Expansion MRR | +$5,000 | +$3,000 |
| Contraction MRR | -$2,000 | -$4,000 |
| Churned MRR | -$8,000 | -$10,000 |
| Net New MRR | +$15,000 | +$14,000 |
| MRR at end | $215,000 | $229,000 |
January Quick Ratio: (20,000 + 5,000) / (2,000 + 8,000) = 2.5
January Expansion Efficiency: 5,000 / 8,000 = 0.63
February Quick Ratio: (25,000 + 3,000) / (4,000 + 10,000) = 2.0
February Expansion Efficiency: 3,000 / 10,000 = 0.30
Diagnosis: total MRR is higher in both months, and New MRR is stronger in February. On the surface that looks like improvement. But Quick Ratio fell from 2.5 to 2.0, Expansion Efficiency collapsed, contraction doubled, and churn rose by 25%. Directionally, the business is getting worse.
Segment cuts matter just as much. Aggregate Net New MRR can easily hide one large enterprise upsell while SMB quietly deteriorates underneath.
Pricing model matters too. Flat-rate makes the four components easy to interpret. Per-seat pricing creates constant expansion and contraction from seat changes. Usage-based pricing is naturally volatile, so Net New MRR should often be analyzed on a rolling 3-6 month window, not as a single isolated month.
How Dnoise Calculates Net New MRR
Dnoise automatically calculates all four Net New MRR components from Stripe transaction history and builds a waterfall view for any period. Reactivation is tracked separately and excluded from Net New MRR by default.
Quick Ratio and Expansion Efficiency update in real time. If multiple Stripe accounts are connected, Net New MRR is aggregated across all sources with drill-down to each individual account.
CTA
Dnoise calculates Net New MRR from source data and shows which movements are actually driving growth.