Avalara Analyst Day Virtual

Reconciliation to Non-GAAP financial measures ($000) Q1 20 Q2 20 Q3 20 Q4 20 Q1 21 Q2 21 Q3 21 Q4 21 Q1 22 ADJ.1 ORG. CALC. BILLINGS Q1 21 Reconciliation of calculated billings Total revenue Add: Deferred revenue (end of period) $111,443 $116,487 $127,879 $144,760 $153,601 $169,067 $181,167 $195,142 $204,530 $(11,370) $193,160 Contract liabilities (end of period) $165,369 $6,330 $167,719 $6,195 $180,640 $7,673 $209,690 $10,134 $225,531 $12,466 $239,395 $11,406 $257,883 $8,597 $282,955 $6,918 $303,610 $897 $(2,015) $(263) $301,595 $634 Less: Deferred revenue (beginning of period) $(161,241) Contract liabilities (beginning of period) Deferred revenue assumed in business combinations $(5,197) $ - $(165,369) $(6,330) $ - $(167,719) $(6,195) $ - $(180,640) $(7,673) $(9,194) $(209,690) $(10,134) $ $(225,531) $(12,466) $(886) $(239,395) $(11,406) $(430) $(257,883) $(8,597) $(747) $(282,955) $(6,918) $ - $1,938 $177 $(381,017) $ - $(6,741) $ - Calculated billings $116,704 $118,702 $142,278 $167,077 $171,774 $180,985 $196,416 $217,788 $219,164 $(11,533) $207,631 (1) Adjustments relate to amounts attributable to acquisitions since April 2021. AVALARA ANALYST DAY VIRTUAL | 52

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