Growth forecasting · Free tool
Forecast referred customers, reward costs, effective CAC, viral coefficient, gross profit, and referral program ROI.
Annual program assumptions
Start conservatively, then replace assumptions with observed cohort data.
Twelve-month projection
Program ROI
+1,236%
$25,067 net gross profit after rewards and software.
Referred customers
58
160 advocates send 480 invitations.
Effective referral CAC
$35.21
Reward and annual software cost per referred customer.
Viral coefficient
0.03
Below 1.00: the channel adds customers but does not self-compound.
A practical guide
A referral program is a funnel: eligible customers become advocates, advocates send invitations, and a share of those invitations convert. Small changes at each stage can materially change the number of customers and the reward budget required.
The calculator models that complete loop and compares expected gross profit with rewards and software cost. Use conservative assumptions first, then update the model with observed Refport data after launch.
Revenue alone can make a weak program look healthy. Track the efficiency and compounding potential of the channel as well.
Questions, answered
The calculator subtracts reward and software costs from the gross profit generated by referred customers, then divides the remaining profit by total program cost.
It estimates how many additional customers each customer creates through referrals. A value above one suggests a self-compounding loop, although retention and timing still affect real growth.
Use gross profit when judging program economics. Revenue includes money required to deliver and support the product and can overstate the return available for rewards.
Keep planning
Start tracking referrals, rewarding advocates, and growing faster with Refport.