We closed Sundays two years ago after tracking our actual sales data by day of week for six months. Sunday was our third lowest volume day and our single highest cost-per-sale day because we were running a full complement of staff for a fraction of the traffic. The DP fought it hard because the instinct is always that being open equals not losing business. What the data showed is that Sunday customers who came in and found us closed either came back Monday or called ahead and scheduled. We lost maybe two or three deals in the first quarter that we could directly attribute to being closed Sunday. We gained measurably better retention in the sales team because the people who stayed valued the day off more than the lost commission opportunity. The DP is now the strongest advocate for staying closed.

I pushed back on our DP about this exact thing eighteen months ago and eventually got him to look at the actual data rather than the assumption. What we found is that our Sunday traffic was almost entirely existing customers coming in for service pickups and a small number of tire-kickers who had no urgency. The genuine buyers, the people who actually closed a deal on a Sunday, were less than 8 percent of our monthly volume and almost all of them had been in contact with us during the week already. They were not going to a competitor because we were closed Sunday. They were calling Monday morning. The DP is not wrong that being open feels like more opportunity. The data at our store said otherwise. Pull your own numbers before assuming the volume is real.

The DP’s assumption that Sunday traffic represents incremental business rather than redistributed business is the thing worth actually testing before this becomes a culture fight. We ran a six-month day-of-week analysis at our store before making any decision and what it showed is that the vast majority of our Sunday units were from customers who had already been in contact with us during the week. They were not conquest customers who would have gone elsewhere if we were closed. They were customers who preferred Sunday delivery for convenience. Almost all of them rescheduled to Monday when we did a test closure. What actually drives the incremental Sunday business argument is the service lane, not sales. That is the conversation worth having separately.

Adding a dimension nobody has mentioned: Sunday closures affect F&I income in ways that are not obvious until you look at your booked deals by day of week. At our store we found that Sunday deliveries were disproportionately rushed because we were short-staffed and customers knew we were closing. F&I presentation time on Sunday averaged about 22 minutes versus 38 minutes on a weekday. That gap translates directly to product penetration. When we closed Sundays and pushed those deliveries to Monday through Saturday the per-deal F&I gross actually went up meaningfully because the presentation was not being compressed by an imminent closing time. The Sunday revenue you think you are losing is partly offset by the back end improvement on every deal you move to a day where you have time to actually do the job right.

The sales floor Sunday debate misses where the real Sunday value sits for most stores. Our service lane is the reason we stay open Sunday and it is a completely different calculation than sales. A customer whose vehicle needs repair and cannot miss work Monday through Friday has nowhere to go if we close Sunday. That customer does not reschedule to next Saturday. They find an independent shop or a quick lube that can take them now and they may never come back to us for routine service again. The sales volume on Sunday is genuinely debatable. The service retention argument is not. If you are considering a Sunday closure, model it separately for sales and service because the right answer for the front of the building is very likely different from the right answer for the back.

The DP framing of this as incremental business is worth testing with one specific question before you have the culture conversation. Ask your DP how many of your Sunday unit sales came from customers who had zero prior contact with the store before walking in that day. That number is almost certainly much smaller than the total Sunday unit count suggests. Most Sunday buyers made contact during the week, got close to a decision, and found Sunday convenient for final steps or delivery. Those are not incremental customers you would have lost if you closed Sunday. They are customers who would have come in Monday. The genuinely incremental Sunday buyer, someone who only shops on Sunday and would go elsewhere if you are closed, exists but is a small fraction of your actual Sunday traffic. The argument for Sunday is often built on the total number rather than the incremental number and they are not the same.

The data usually wins this argument. If you can prove that Sunday sales are just shifted from other days and that F&I gross actually improves during the week, most DPs will listen. Burnout is real, and a rested sales team performs much better on Monday.

If you’re open on Sunday, you don’t have work life balance.

Reading this on a Sunday morning, so felt compelled to reply, lol. The data does not support Sunday being a net add for most stores. A group I worked with tracked Sunday traffic and gross per deal for 18 months and Sunday had the lowest gross per unit of any day and the same monthly volume whether they were open or closed once they ran the test. The customers who want to buy on Sunday come back Monday or they buy online. The ones who won't wait are usually the most price sensitive anyway. The retention and burnout cost of running a seven-day operation is real and it is not showing up in your DP's revenue model.

The data usually proves Sunday is just redistributed business. Most DPs fear losing deals, but they ignore the hidden costs of staff turnover and lower F&I gross. I’d take a rested, high-performing team on Monday over a burnt-out crew on a slow Sunday any day.

The F&I gross argument is a huge point. If you’re rushing presentations because it’s Sunday, you're literally leaving money on the table. Most buyers will just come back Monday anyway. Burnout is real—a rested team is always more profitable than an exhausted one.

The F&I point is massive. Rushing deals on Sunday just hurts your backend gross. Most DPs fear losing one unit, but they ignore the high cost of burnout and turnover. Showing the actual data on redistributed business is the only way to win this argument.

The data rarely lies. Sunday is often high-cost and low-reward for the sales floor. Giving the team a guaranteed day off improves morale and retention far more than those few "incremental" deals are worth. Work-life balance is a major competitive advantage in today's hiring market.

I've seen this play out at two different stores. Once we went to a 6-day week, morale shot up and we didn't lose volume. DPs need to look at the F&I compression—rushing deals on a short Sunday is just leaving money on the table. Focus on data, not fear.