There is no definitive answer to this question as it depends on a variety of factors, such as the size and scope of your business, your marketing goals, and the types of marketing campaigns you plan to run. However, a good rule of thumb is to budget around 7-15% of your annual revenue for marketing expenses. If you're just starting out or have a limited budget, you may want to allocate a smaller percentage (5-10%) of your revenue for marketing expenses. On the other hand, if you're looking to invest in more expensive initiatives like influencer marketing, you may want to budget closer to 15-20% or more.