Calculate Your Postcard Marketing ROI

The defaults reflect typical performance for direct mail to house lists (your existing or lapsed customers) by industry. Healthcare and dental verticals tend to land in the 4–6% range; home services sit around 3–4%; med spa and other high-ticket recurring categories can reach 6%+. Your real number will depend on list quality, offer strength, and follow-up. See our direct mail response rates page for the underlying benchmarks.

Multi-wave sequencing is a Pro plan feature ($99/month). When you toggle to 2 or 3 waves, the calculator adds a 3-month Pro subscription on top of card costs to reflect the realistic cost of running the campaign through PostKnock. Single-wave campaigns work on the Free plan with no monthly fee.

Use your typical first-year revenue per reactivated or new customer. For dental, that's usually two cleanings plus one restorative procedure. For HVAC, it's a service call plus possible upsell. Don't include lifetime value — this calculator is for the year-one ROI of the campaign. If a reactivated patient sticks around for 3+ years, your real ROI is much higher than the number shown here.

Postcard marketing has very low break-even thresholds because each customer is worth far more than the cost of the cards needed to acquire them. For a dental practice with $1,200 average value and $0.79 cards, you only need roughly 1 in 1,500 recipients to convert to break even. That's why postcards work for any business with high customer value — the math is forgiving.