The Half-Price Voucher That Filled the Diary and Emptied the Margin
Fern & Fennel is an independent day spa with 12 therapists and average room utilisation of 55%. In spring it sold 1,200 '£39 for an £80 treatment' vouchers through a daily-deals site. By September, 936 (78%) had been redeemed; 62% of redeemers have not rebooked. Redeemers spent an average of £3 on retail, against £18 for direct clients. Because voucher holders could book any time, 40% of redemptions fell on Friday to Sunday, when the spa usually sells out at full price; the manager believes those slots would have sold at £80. The deal site takes 30% commission and pays 60 days after redemption. Each 60-minute treatment costs about £18 in therapist pay and £4 in product. Two therapists have resigned this quarter, citing burnout from back-to-back voucher clients. The owner wants to repeat the promotion before Christmas because 'the phone rang constantly'.
1. Calculate the contribution of the campaign and judge whether the owner's plan to repeat it is justified. Show your working.
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Redeemed vouchers: 936 x £39 = £36,504 gross. Deal-site commission at 30%: £10,951. Net revenue: £25,553.
Direct cost: 936 x (£18 + £4) = £20,592. Contribution before retail: £4,961, or £5.30 per redemption.
Retail: 936 x £3 = £2,808 of sales; at an assumed 50% margin that is £1,404, taking contribution to about £6,365.
Displacement: 40% of 936 = 374 treatments in slots that would otherwise have sold at £80. Lost contribution per displaced slot is £80 minus the £22 variable cost = £58, so 374 x £58 = £21,692. Net position: roughly £6,365 minus £21,692 = minus £15,327.
Even ignoring displacement, the campaign returned about £6.30 per treatment for a £80 service - before rent, utilities and reception. The repeat is not justified on these numbers. The owner is remembering call volume, not contribution. The two resignations add recruitment and training cost that the campaign does not show.
A repeat could only be defended with off-peak-only redemption, a higher price point, a capped volume and a conversion mechanism. None of those were in the spring offer.
2. Design a replacement promotion that protects margin and targets the real problem, explaining each design choice.
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The real problem is not demand; utilisation is 55% and weekends already sell out. The problem is weekday daytime capacity and first-visit conversion. Design for those two things.
Offer: a 'Weekday Discovery' package at £59 for a 50-minute treatment plus a 15-minute consultation, valid Monday to Thursday before 15:00, limited to 300 vouchers. Price at 26% off rather than 51%, keeps the £80 anchor visible, and the restricted window means it cannot displace full-price weekend revenue.
Attach conversion: every redemption includes a 20% credit toward a second visit booked before leaving, redeemable within 30 days. That creates a reason to return and gives the reception team a script. Train the team to discuss a course or membership at checkout, and measure rebooking rather than voucher sales.
Protect capacity: cap voucher bookings at 30% of any therapist's day and exclude the two most in-demand therapists. This directly addresses the burnout that drove the resignations.
Protect cash: avoid a 30% commission channel where possible; sell through the spa's own booking system and email list, even at a lower volume. If a third-party site is used, negotiate a lower rate and a 30-day payment term.
3. Specify the KPIs and staffing actions you would monitor, with thresholds that would trigger a stop.
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Measure contribution, not revenue. Core KPIs: contribution per treatment hour (target at least £35, stop the offer below £25); rebooking rate within 30 days (target 35%, stop below 20%); retail attachment for offer clients (target 15%, stop below 8%); weekday daytime utilisation (target 65%); and therapist overtime and absence (any week above 10% overtime triggers a capacity review).
Also track the mix: the share of offer bookings on Friday to Sunday must stay at zero by design; any leakage means the booking rules are not enforced. Track commission cost as a percentage of net revenue and time-to-payment, because 60-day terms strain cash in a seasonal business.
Staffing: recruit one therapist before launch, not after, and schedule a 10-minute gap every four treatments. Give the team a briefing that names the offer's limits and the right to refuse a booking that would breach them. Monitor resignations monthly; two in a quarter at 12 therapists is already a warning.
Set a formal stop rule: if after four weeks contribution per treatment hour is below £25 or rebooking is below 20%, end the offer rather than discounting further. Review at four and eight weeks with the owner present.