Purpose: To examine the impact of a nicotine replacement therapy (NRT) enhancement on quit outcomes. Design: Observational study using an intent to treat as treated analysis. Setting: Not available. Participants: A total of 4022 Idaho tobacco users aged ≥18 years who received services from the Idaho Tobacco Quitline or Idaho’s web-based program. Intervention: One-call phone or web-based participants were sent a single 4- or 8-week NRT shipment. Multiple-call participants were sent NRT in a single 4-week shipment or two 4-week shipments (second shipment sent only to those completing a second coaching call). Measures: North American Quitline Consortium recommended Minimal Data Set items collected at registration and follow-up. Thirty-day point prevalence quit rates were assessed at 7-month follow-up. Analysis: Multiple logistic regression models were used to examine the effects of program type and amount of NRT sent to participants while controlling for demographic and tobacco use characteristics. Results: Abstinence rates were significantly higher among 8-week versus 4-week NRT recipients (42.5% vs 33.3%). The effect was only significant between multiple-call program participants who received both 4-week NRT shipments versus only the first of 2 possible 4-week shipments (51.1% vs 31.1%). Costs per quit were lowest among web-based participants who received 4 weeks of NRT (US$183 per quit) and highest among multiple-call participants who received only 1 of 2 possible NRT shipments (US$557 per quit). Conclusion: To better balance cost with clinical effectiveness, funders of state-based tobacco cessation services may want to consider (1) allowing tobacco users to choose between phone- and web-based programs while (2) limiting longer NRT benefits only to multiple-call program participants.