Trusted tax partners for Madrid's freelancers and small businesses
Kari Boost was built by accountants who understand the unique tax challenges autónomos and small companies face in Madrid, Spain each year.
Meet Our TeamWhere We Work
We support freelancers and small businesses throughout Madrid, Spain
Why Freelancers Choose Kari Boost
What sets our approach apart from generic accounting firms
Our team focuses specifically on autónomos and small business owners, so we understand the deductions and deadlines that apply to your situation in Madrid, Spain.
You work with the same accountant year-round rather than being routed through a call center, so questions get answered by someone who knows your file.
We track quarterly and annual filing dates on your behalf and reach out ahead of time, reducing the chance of missed submissions or late penalties.
Our fees are agreed upfront based on your business complexity, with no surprise charges added once your filing is underway.
How We Work
A clear, consistent process we follow with every client
Initial Review
We start with a conversation about your business activity, income sources, and past filings to understand your specific tax situation and identify what documentation we'll need.
Document Collection
We provide a simple checklist and secure channel for sharing invoices, expense records, and receipts, so nothing gets lost between you and our team.
Preparation and Review
Our accountants prepare your filing, apply eligible deductions, and walk you through the figures before anything is submitted, so you understand exactly what's being filed.
Filing and Follow-Up
Once you approve the return, we submit it directly with Hacienda and remain available afterward for any questions or follow-up correspondence from tax authorities.