How to Set a Social Media Budget for Car Dealerships
Most advice on a social media budget for car dealerships hands you a percentage and stops there. A better method starts with the cars you need to sell and works backward to the spend, so every dollar has a job you can check at month end.
Why a flat percentage fails
Setting social spend as a fixed share of the ad budget is easy, which is why it is common. The trouble is that it has no link to a result. If the number is too low to produce enough appointments, you conclude social does not work. If it is too high, you keep paying long after the extra spend stopped producing anything.
A budget should be the answer to a question: how many additional units do we need from this channel, and what does it cost to get them?
Work backward from units
- Set the unit goal. Decide how many sales you want social to add this month. Be specific.
- Divide by your closing rate on shown appointments. That gives you the number of shoppers who need to show.
- Divide by your show rate. That gives you the number of set appointments required.
- Multiply by your cost per set appointment. That is your budget.
If you have never tracked cost per set appointment for social, run one campaign with a modest test budget and calculate it: total spend divided by appointments set. From then on you are budgeting from your own data. To see how your funnel compares, Willowood BDC benchmarks are a 35% set rate, a 65% show rate and a 15% overall closing rate.
Check the budget against gross
Before you approve the number, run one more calculation. Multiply the unit goal by your average front and back gross per unit. Divide that by the planned spend. If the return does not justify the effort, change the plan before you spend, not after. Lower the cost per appointment with a stronger offer, or raise the show rate with better confirmation, and run the math again.
This also gives you the sentence your owner wants to hear: “We plan to spend this much to sell this many units for this much gross.”
Split the budget three ways
Once you have a total, divide it by purpose. The exact shares depend on your store, but each of these deserves a line.
- Event campaigns. Short, concentrated pushes built to set appointments for specific days. This is where most of the measurable return comes from, so it usually gets the largest share.
- Always-on inventory and retargeting. A steady, smaller spend that keeps your vehicles in front of people who have visited your site or messaged your page.
- Testing. A small amount reserved for new creative, a new platform such as TikTok, or a new audience. Without it, you never find the next thing that works.
Keep the three in separate campaigns so their results never blur together.
Concentrate spend, do not sprinkle it
A common error is spreading a monthly budget evenly across 30 days. Thin daily spend rarely builds enough momentum to fill a calendar. Concentrating the event share into a defined window, with a clear offer and a deadline, gives the platform enough volume to find buyers and gives shoppers a reason to book now.
Remember the costs that are not media. Someone has to build the creative and someone has to answer every message at all hours. If those are handled in house, count the staff time. If a partner handles them, compare the full package and not just the ad spend.
Review weekly, adjust monthly
Each week, look at spend, conversations, set appointments, shows and sold units. If cost per set appointment is rising, refresh the creative or the offer. If shows are weak, fix confirmations before adding spend. At month end, recalculate cost per sale and reset next month’s budget from the new numbers.
Raise the budget only when two things are true: cost per sale is acceptable, and your team handled the last month’s appointments well. More appointments than your floor can serve wastes money and hurts reviews.
Frequently asked questions
Should co-op funds be part of the social budget?
Yes, where your manufacturer allows it. Check the creative and reporting requirements before the campaign runs so the claim is not rejected.
Does a small store need a different approach?
The method is the same. The unit goal is smaller, so the budget is smaller. Concentrating spend matters even more when the total is modest.
What if we have no historical data?
Run one tracked campaign, record every number, and use that as your baseline. One real month is better than any industry average.
See what an event would look like for your store
Willowood Ventures runs Facebook Sales Events for 600+ dealer partners and manages $4 million per month in social advertising. Dealers see approximately 800% average ROI, and 90% of them rebook. Book a demo and we will walk through your market, your inventory and your set appointment target.
