A low quote isn’t always a low price. The most common add-ons are extra revision rounds, rush delivery, voiceover, music licensing, and extra sizes for each platform. HubSpot warns that some agencies quote a low price and then charge separately for voiceover and every amendment (HubSpot).
Before you sign, ask four questions: How many revision rounds are included? Is music licensed for commercial use? How many formats will I receive? What happens if I need it sooner? A clear written answer to each one is the best protection against a final bill that doesn’t match the quote.