The marketing section is often the weakest part of a business plan. Founders write something like “we’ll use Facebook and Instagram ads to reach our audience” and put a round number next to it. Investors and lenders see this all the time, and it rarely fills them with confidence.
A paid social budget doesn’t have to be perfect. It does have to show that you’ve thought about how the money turns into customers. Here’s how to build one that holds up under questions.
Work backwards from revenue
Start with what you need, not with what you can afford. If your plan says you’ll reach $30,000 in monthly revenue by the end of year one, how many orders is that? With an average order of $60, it’s 500 a month. If a third come from repeat buyers and other channels, paid social has to bring in roughly 330 new customers.
That number is the anchor for everything that follows.
Estimate cost per acquisition honestly
This is where most plans go wrong. Founders take a best-case figure from a blog post and build the whole budget on it. Use a range instead.
If you’ve run any ads already, even a small test, use your own data. If you haven’t, look for benchmarks in your specific industry and assume you’ll do worse than average at first. New ad accounts with no history and untested creative almost always pay more for their first customers.
Say your realistic range is $25 to $45 per new customer. For 330 customers a month, that’s about $8,250 to $14,850 in monthly spend. Show both ends in the plan. Readers trust a range more than a suspiciously precise figure.
Add a testing budget
Your first months of advertising are mostly about learning which audiences, offers and creatives work. Set aside a separate testing budget for this, often 15 to 25 percent of planned spend in the first quarter, and label it clearly. It shows you understand that early results won’t look like steady-state results.
Plan the ramp, not just the destination
Very few businesses hit their year-one spend from month one. Build a month-by-month table that starts small and grows as you learn what works. Something like 30 percent of target spend in month one, rising to the full amount by month six, is a reasonable shape for many consumer businesses. Tie each step to a milestone, such as reaching a target cost per acquisition, rather than to a calendar date alone.
Count the costs around the ads
Media spend is only part of the picture. A realistic plan also covers:
- creative production, whether that’s a freelancer, a designer or your own time;
- tools for landing pages, analytics and email;
- agency or freelancer fees if someone else runs the accounts;
- a contingency of around 10 percent for price rises and surprises.
Show how you'll control the spend
Lenders and investors like to see that money won’t leak. A short paragraph on how ad spend will be managed goes a long way: account-level spending limits on Meta, a monthly review against plan, and how payments will be handled. Some founders set up a separate card for each platform for exactly this reason. Options like Finup virtual cards for Meta ads let you cap what each ad account can spend and keep advertising costs apart from the rest of the business. It’s a small detail, but it signals operational discipline.
Revisit it every quarter
Treat the plan as a working document. Once real campaigns are running, swap your assumptions for actual numbers and update the forecast. Founders who do this end up with a useful management tool, not a document written once for the bank and never opened again.
