The real ROI for a customer relationship marketing system

By Jenny Yu.   

Unleash the power of connecting with your current customers through a system that works for you. 

gFour Marketing believes that smart contractors recognize the long-term value of their customers. That’s why they’ve created a proven customer relationship marketing system built specifically for home improvement contractors. Their system includes four revenue-generating strategies: 

1 – Customer appreciation 

Putting a system in place to say “thank you” to your customers drives more referrals, more repeat business and more online reviews. 

In one case study, before implementing a structured appreciation system, only ~3% of customers were leaving reviews. After launching a systematic appreciation campaign, that number increased to 28% within the first year and reached 63% by year three. During that time, over 90% of reviews were five-star. Across a broader dataset of 300 contractors, the average percentage of customers leaving five-star reviews is 40%. 

2 – Referral marketing 

Reminding customers about a referral rewards program is critical — especially long after the job is complete. gFour’s analysis shows that 82% of referrals occur more than three months after job completion, highlighting the importance of consistent, long-term follow-up rather than one-time referral asks. Additionally, 44% of customers who refer submit more than one referral. 

3 – Past customer campaigns 

Unlock more revenue by creating a structured, multi-channel approach to reactivate past customers. gFour data shows that database reactivation campaigns can generate 2–10% repeat conversion over 12 months. In one roofing case study, 94 repeat jobs were generated from a list of 2,721 past customers in under three months (3.5% conversion rate). Across 69 holiday mailer campaigns, the average campaign produced $38,882 in revenue at an average marketing cost of 6.8%. 

4 – Rehash unsold leads 

Don’t give up after a lead initially doesn’t convert. gFour data shows that systematic rehash campaigns — combining direct mail, email and monthly newsletter touches — have generated approximately 7% conversion on previously unsold leads. In one case study, 898 unsold leads were entered into a rehash campaign, producing 99 conversions (11% conversion rate) and nearly $1 million in revenue at a 0.6% cost of marketing. 

Measuring ROI the right way 

gFour tracks “influenced revenue” across repeat jobs, referrals and review-driven impact to demonstrate how a structured relationship marketing system contributes to long-term growth. 

Rather than focusing solely on new lead acquisition, this approach measures the total revenue influenced by nurturing existing customers over time. 

Across participating contractors, influenced ROI consistently shows strong returns relative to program investment — with contractors who run the program for 12+ months seeing a median 14x ROI. 

Importantly, ROI accelerates the longer the system is in place, as repeat purchases, referrals and reputation compound over time. 

Learn more about how gFour Marketing can transform your business by maximizing your ROI.