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Please note that this spreadsheet has been created by Christoph Janz of Point Nine Capital. You can find out more about the article here: http://andrewchen.co/the-easiest-spreadsheet-for-churn-mrr-and-cohort-analysis-guest-post/
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Notes

1) The blue values need to be entered. Everything else is calculated automatically.

2) MRR increases of a cohort in spite of customer churn are the result of "account expansions" – customers paying you more by adding seats, upgrading to a higher plan, buying premium features etc.

3) If you want to calculate your CLTV, "costs of good sold" should be subtracted from revenues (payment, hosting, customer service).

4) CACs should be "all in", including sales and marketing expenses and salaries and all costs associated with customer acquisition.

5) If you want to know if you're acquiring customers profitably using your sales & marketing initiatives, include only customers won via those initiatives in the analysis and exclude all others.

6) For simplicity purposes, this template contains only 10 months of data. If you have older cohorts, please extend the sheet accordingly.

Disclaimer: Please be aware that his model may be inaccurate, incorrect or misleading, use it at your own risk, yada yada yada.

Feel free to distribute. If you distribute a modified version, please make it clear that you've made changes.
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Customer Churn
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ConversionNew
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monthcustomers# of retained customers in monthA1# of retained customers in lifetime monthA2# of churned customers in lifetime monthA3
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Jan-13Feb-13Mar-13Apr-13May-13Jun-13Jul-13Aug-13Sep-13Oct-1301234567890123456789
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Jan-138078757270696766666564787572706967666665642332121011
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Feb-1388888682787776737270888682787776737270024411312
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Mar-1310510310398949290868210310398949290868220542244
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Apr-1311010710610299979290107106102999792903143252
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May-13115114112105989796114112105989796127711
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Jun-1312812812211911511012812211911511006345
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Jul-131371361291221181361291221181774
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Aug-131511491451351491451352410
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Sep-1316115815415815434
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Oct-131681671671
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781632613624655806968219521,086
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% of retained customers in lifetime monthB1% of churned customers in lifetime month (relative to base number)B2% of churned customers in lifetime month (relative to previous month)B3
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012345678901234567890123456789
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Jan-138097.50%93.75%90.00%87.50%86.25%83.75%82.50%82.50%81.25%80.00%2.50%3.75%3.75%2.50%1.25%2.50%1.25%0.00%1.25%1.25%2.50%3.85%4.00%2.78%1.43%2.90%1.49%0.00%1.52%1.54%
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Feb-1388100.00%97.73%93.18%88.64%87.50%86.36%82.95%81.82%79.55%0.00%2.27%4.55%4.55%1.14%1.14%3.41%1.14%2.27%0.00%2.27%4.65%4.88%1.28%1.30%3.95%1.37%2.78%
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Mar-1310598.10%98.10%93.33%89.52%87.62%85.71%81.90%78.10%1.90%0.00%4.76%3.81%1.90%1.90%3.81%3.81%1.90%0.00%4.85%4.08%2.13%2.17%4.44%4.65%
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Apr-1311097.27%96.36%92.73%90.00%88.18%83.64%81.82%2.73%0.91%3.64%2.73%1.82%4.55%1.82%2.73%0.93%3.77%2.94%2.02%5.15%2.17%
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May-1311599.13%97.39%91.30%85.22%84.35%83.48%0.87%1.74%6.09%6.09%0.87%0.87%0.87%1.75%6.25%6.67%1.02%1.03%
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Jun-13128100.00%95.31%92.97%89.84%85.94%0.00%4.69%2.34%3.13%3.91%0.00%4.69%2.46%3.36%4.35%
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Jul-1313799.27%94.16%89.05%86.13%0.73%5.11%5.11%2.92%0.73%5.15%5.43%3.28%
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Aug-1315198.68%96.03%89.40%1.32%2.65%6.62%1.32%2.68%6.90%
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Sep-1316198.14%95.65%1.86%2.48%1.86%2.53%
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Oct-1316899.40%0.60%0.60%
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98.79%96.00%91.36%88.07%86.58%84.54%82.25%80.59%80.36%80.00%1.21%2.70%4.70%3.67%1.92%2.21%2.61%1.83%1.79%1.25%1.21%2.73%4.90%4.00%2.17%2.55%3.08%2.22%2.17%1.54%
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MRR Churn
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ConversionNewIf you have any questions or comments:
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monthMRRCohort MRR in monthC1Retained MRR in lifetime monthC2MRR churn in lifetime monthC3christoph@pointninecap.com
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Jan-13Feb-13Mar-13Apr-13May-13Jun-13Jul-13Aug-13Sep-13Oct-1301234567890123456789
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Jan-13 $ 7,851 $7,650$7,536$7,234$6,982$6,876$6,780$6,678$6,567$6,454$6,342$7,650$7,536$7,234$6,982$6,876$6,780$6,678$6,567$6,454$6,342$201$114$302$252$106$96$102$111$113$112
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Feb-13 $ 7,988 $7,988$7,688$7,232$6,998$6,890$6,789$6,679$6,589$6,459$7,988$7,688$7,232$6,998$6,890$6,789$6,679$6,589$6,459$0$300$456$234$108$101$110$90$130
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Mar-13 $ 9,234 $9,145$8,897$8,678$8,569$8,432$8,352$8,152$7,988$9,145$8,897$8,678$8,569$8,432$8,352$8,152$7,988$89$248$219$109$137$80$200$164Created by Christoph Janz
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Apr-13 $ 10,123 $9,988$9,657$9,222$8,901$9,201$9,468$9,688$9,988$9,657$9,222$8,901$9,201$9,468$9,688$135$331$435$321-$300-$267-$220at Point Nine Capital
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May-13 $ 11,788 $11,678$11,546$11,321$11,678$11,755$11,868$11,678$11,546$11,321$11,678$11,755$11,868$110$132$225-$357-$77-$113
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Jun-13 $ 12,876 $12,876$12,546$12,433$12,399$12,976$12,876$12,546$12,433$12,399$12,976$0$330$113$34-$577
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Jul-13 $ 13,212 $12,987$12,756$13,345$13,456$12,987$12,756$13,345$13,456$225$231-$589-$111
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Aug-13 $ 14,789 $14,786$14,201$14,897$14,786$14,201$14,897$3$585-$696
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Sep-13 $ 15,786 $15,676$14,988$15,676$14,988$110$688
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Oct-13 $ 16,119 $15,897$15,897$222
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$7,650$15,524$24,067$33,099$43,887$55,883$67,654$82,452$98,039$114,559
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% of retained MRR in lifetime monthD1% MRR churn in lifetime monthD2% MRR churn in lifetime month (relative to previous month)D3
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012345678901234567890123456789
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Jan-13$7,85197.44%95.99%92.14%88.93%87.58%86.36%85.06%83.65%82.21%80.78%2.56%1.45%3.85%3.21%1.35%1.22%1.30%1.41%1.44%1.43%2.56%1.49%4.01%3.48%1.52%1.40%1.50%1.66%1.72%1.74%
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Feb-13$7,988100.00%96.24%90.54%87.61%86.25%84.99%83.61%82.49%80.86%0.00%3.76%5.71%2.93%1.35%1.26%1.38%1.13%1.63%0.00%3.76%5.93%3.24%1.54%1.47%1.62%1.35%1.97%
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Mar-13$9,23499.04%96.35%93.98%92.80%91.31%90.45%88.28%86.51%0.96%2.69%2.37%1.18%1.48%0.87%2.17%1.78%0.96%2.71%2.46%1.26%1.60%0.95%2.39%2.01%
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Apr-13$10,12398.67%95.40%91.10%87.93%90.89%93.53%95.70%1.33%3.27%4.30%3.17%-2.96%-2.64%-2.17%1.33%3.31%4.50%3.48%-3.37%-2.90%-2.32%
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May-13$11,78899.07%97.95%96.04%99.07%99.72%100.68%0.93%1.12%1.91%-3.03%-0.65%-0.96%0.93%1.13%1.95%-3.15%-0.66%-0.96%
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Jun-13$12,876100.00%97.44%96.56%96.30%100.78%0.00%2.56%0.88%0.26%-4.48%0.00%2.56%0.90%0.27%-4.65%
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Jul-13$13,21298.30%96.55%101.01%101.85%1.70%1.75%-4.46%-0.84%1.70%1.78%-4.62%-0.83%
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Aug-13$14,78999.98%96.02%100.73%0.02%3.96%-4.71%0.02%3.96%-4.90%
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Sep-13$15,78699.30%94.94%0.70%4.36%0.70%4.39%
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Oct-13$16,11998.62%1.38%1.38%
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99.09%96.30%96.02%94.40%93.77%92.07%88.64%84.33%81.53%80.78%0.91%2.85%0.53%0.66%-1.01%-0.22%0.55%1.46%1.53%1.43%0.91%2.88%0.55%0.69%-1.09%-0.24%0.61%1.70%1.85%1.74%
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Customer acquisition profitability
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ConversionNew
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monthMRRCACsCumulated revenue in lifetime month vs. CACsE1E2
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0123456789 Cohort is profitable since lifetime month
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Jan-13$7,851$50,000$7,650$15,186$22,420$29,402$36,278$43,058$49,736$56,303$62,757$69,0997
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Feb-13$7,988$50,000$7,988$15,676$22,908$29,906$36,796$43,585$50,264$56,853$63,3126
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Mar-13$9,234$60,000$9,145$18,042$26,720$35,289$43,721$52,073$60,225$68,2136
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Apr-13$10,123$60,000$9,988$19,645$28,867$37,768$46,969$56,437$66,1256
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May-13$11,788$70,000$11,678$23,224$34,545$46,223$57,978$69,846Not yet profitable
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Jun-13$12,876$70,000$12,876$25,422$37,855$50,254$63,230Not yet profitable
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Jul-13$13,212$80,000$12,987$25,743$39,088$52,544Not yet profitable
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Aug-13$14,789$90,000$14,786$28,987$43,884Not yet profitable
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Sep-13$15,786$90,000$15,676$30,664Not yet profitable
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Oct-13$16,119$90,000$15,897Not yet profitable
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