Why Use the Discount & Promo Code Revenue Calculator?
Running promotional sales (e.g., “50% off for 6 months” or Black Friday promo codes) can accelerate user acquisition. However, discounting eats into gross profit margins and risks attracting high-churn bargain hunters.
This tool helps product and marketing leads model discounted revenue, post-promo price reset retention, and 12-month net gross profit.
Key Mathematical Formulas
1. Discounted Price & Promo Revenue
\[\text{Discounted Price} = \text{Standard Price} \times (1 - \text{Discount \%})\] \[\text{Promo Revenue} = \text{Signups} \times \text{Discounted Price} \times \text{Promo Duration (mo)}\]2. Post-Discount Retained MRR
\[\text{Retained Accounts} = \text{Signups} \times \text{Post-Discount Retention \%}\] \[\text{Post-Discount MRR} = \text{Retained Accounts} \times \text{Standard Price}\]3. Total 12-Month Campaign Revenue & Margin
\[\text{Total 1-Year Revenue} = \text{Promo Revenue} + \left( \text{Retained Accounts} \times \text{Standard Price} \times (12 - \text{Promo Duration}) \right)\] \[\text{Gross Margin \%} = \frac{\text{Total 1-Year Revenue} - \text{Total 1-Year COGS}}{\text{Total 1-Year Revenue}}\]Real-World Promo Discount Performance Matrix
| Discount % | Promo Duration | Benchmark Retention % | 12-Month Net ARPU Yield |
|---|---|---|---|
| 10% Off | 3 Months | 85% – 92% | 94% of Standard Yield |
| 20% Off | 6 Months | 70% – 80% | 83% of Standard Yield |
| 30% Off | 6 Months | 55% – 68% | 71% of Standard Yield |
| 50% Off | 12 Months | 35% – 50% | 52% of Standard Yield |
Step-by-Step Guide to Planning SaaS Discounts
- Establish Baseline Unit COGS: Determine your hosting, support, and payment fees per customer.
- Define Promo Scope: Set the discount rate (e.g. 20%) and expiration window (e.g. 3 or 6 months).
- Forecast Post-Discount Retention: Estimate what percentage of accounts will remain after the full rate applies.
- Compare Net 12-Month Revenue: Ensure the total volume of new signups offsets the reduced ARPU per user.
Frequently Asked Questions
Are promotional discounts effective for B2B SaaS?
Limited-time discounts work well for customer acquisition, but deep permanent discounts (>30%) attract price-sensitive customers who churn rapidly when prices reset.
What is a healthy post-discount retention rate?
High-performing SaaS products retain 70% to 85% of discounted cohort signups when prices revert to full standard rates. Retention rates below 50% indicate discount misuse.
How long should a promo discount last?
The optimal promo duration is 3 to 6 months. This gives users enough time to build habit and extract product ROI before paying full price.
How do promo discounts affect unit gross margin?
Because direct COGS (hosting, support) remain fixed, a 20% price discount reduces gross profit dollar margins proportionally more than 20%.
Should I discount monthly or annual plans?
Offering discounts on annual plans (e.g. 20% off annual prepay) is generally superior because it secures upfront cash flow and 12-month retention.
How do I calculate total 12-month campaign revenue?
12-Month Revenue = (Signups × Discounted Price × Promo Months) + (Signups × Retention % × Full Price × Remaining Months).