Somewhere in your invoicing system sits the cheapest revenue you will ever generate: hundreds of past customers who already know you, already trusted you with their home or their health or their car — and haven’t heard from you since the invoice cleared. While you pay auction prices for strangers, the people most likely to buy again sit in a spreadsheet, forgotten.
Why past customers convert absurdly well
Acquisition marketing fights three battles — attention, trust, timing. With past customers, two are already won: they know you exist and they’ve seen your work. Reactivation only has to solve timing, which is why response rates on a decent win-back message dwarf any cold channel, at the cost of pennies per send.
The campaigns, by trigger
- The simple win-back: anyone inactive 12+ months gets a short, warm text — "Hi Maria, it’s Tom from BlueBonnet Plumbing. It’s been a while since we saw your water heater — everything holding up? If anything needs a look, we’d love to take care of you." No coupon required; presence is the product.
- Equipment-age triggers: you know when you installed it. Water heaters at year 8, AC systems at year 10, roofs after the hail path — age-based check-ins arrive precisely when the need matures.
- Seasonal service memory: the customers who bought fall cleanups, pre-summer tune-ups, or holiday catering last year are the list for this year’s reminder. One send, predictable bookings.
- The revival of dead quotes: every unclosed estimate over 90 days old gets one honest resurrection — "we never connected on that repipe; still on your list?" The yes-rate on this embarrasses every other channel.
The rules that keep it welcome
Text only customers with a real relationship and consent posture, respect the channel’s etiquette (business hours, instant opt-out), send quarterly-ish rather than monthly, and make every message something a reasonable customer is glad arrived. The list is an orchard, not a mine.
Wiring this to your job history is a one-time build that pays indefinitely — usually the second automation we turn on, right after reviews. Got years of invoices and no machine on them? Talk to our AI or email hello@mediajunkie.io — bring the list size, we’ll bring the projection.