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ARR Forecaster

Project ARR from new, expansion & churn cohorts.

Base — your inputs as-is

ARR in 12 mo
$2,497,251
ARR in 24 mo
$8,381,854
Net retention
99.0%

MRR projection

24 mo

Monthly table

MoMRRARRNewExpChurn
1$57,500$690,000$8,000$1,000$1,500
2$65,725$788,700$8,800$1,150$1,725
3$74,748$896,973$9,680$1,315$1,972
4$84,648$1,015,779$10,648$1,495$2,242
5$95,515$1,146,175$11,713$1,693$2,539
6$107,444$1,289,322$12,884$1,910$2,865
7$120,542$1,446,499$14,172$2,149$3,223
8$134,926$1,619,111$15,590$2,411$3,616
9$150,725$1,808,704$17,149$2,699$4,048
10$168,082$2,016,980$18,864$3,015$4,522
11$187,151$2,245,810$20,750$3,362$5,042
12$208,104$2,497,251$22,825$3,743$5,615
13$231,131$2,773,567$25,107$4,162$6,243
14$256,437$3,077,250$27,618$4,623$6,934
15$284,253$3,411,037$30,380$5,129$7,693
16$314,829$3,777,942$33,418$5,685$8,528
17$348,440$4,181,280$36,760$6,297$9,445
18$385,391$4,624,697$40,436$6,969$10,453
19$426,017$5,112,202$44,479$7,708$11,562
20$470,684$5,648,207$48,927$8,520$12,781
21$519,797$6,237,565$53,820$9,414$14,121
22$573,801$6,885,613$59,202$10,396$15,594
23$633,185$7,598,224$65,122$11,476$17,214
24$698,488$8,381,854$71,634$12,664$18,996
AI explainer

Ask anything about your result

The math above is deterministic. AI explains what it means — it never recalculates the numbers.

About

Project ARR over 24 months using new-MRR growth, expansion, and churn. Built to answer 'where will we be by next year?' without spreadsheet gymnastics.

How it works

  1. 01Each month: end MRR = start MRR + new MRR + expansion − churn.
  2. 02New MRR compounds by your growth rate each month.
  3. 03Expansion and churn are applied as a % of starting MRR.
  4. 04ARR at any month = MRR × 12.

Examples

From $600k to $3M ARR

$50k starting MRR, $8k new MRR/month growing 10%, 2% expansion, 3% churn. Hits ~$250k MRR (~$3M ARR) by month 24.

Net revenue retention

Expansion − churn = NRR-100. Best-in-class SaaS hits 110%+ NRR; that alone doubles ARR every ~7 years without new customers.

FAQ

What if my growth isn't compounding?+
Set growth to 0% — then 'new MRR' stays flat each month. Realistic for hardware-style sales cycles.
Is this the same as cohort forecasting?+
No — cohort analysis tracks each month's signups separately. This is a simpler top-down model. Good enough for a one-pager, not for a board doc.
Should I use gross or net churn?+
Use gross churn here so expansion is counted separately. Don't double-count.

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