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Small Business Accountant

Small Business Accountant in Aurora, CO

Clean books, organized taxes, and practical guidance—so you can focus on running your business.

Built for Small Business Owners

Running a business leaves little time for bookkeeping, tax deadlines, and compliance tracking. Mark Christiansen Associates LLC provides small business accounting support in Aurora and across the Denver Metro area, helping owners stay organized, compliant, and financially informed.


If you’re asking, “Do you do bookkeeping for small businesses?” the answer is yes—and much more.

Tax + Bookkeeping Support in One Place

Many small businesses struggle because bookkeeping and tax planning are handled separately. We integrate both.

  • Small Business Bookkeeping
    • Monthly bank and credit card reconciliation
    • Organized expense categorization
    • Profit & Loss and Balance Sheet reporting
    • Ongoing record maintenance

    Clean books without the year-end scramble.

  • Tax Preparation for Businesses
    • S-corporation, partnership, and LLC returns
    • Estimated tax payment coordination
    • Multi-entity tax filing support

    Compliance-first support that reduces surprises.


  • Payroll & Reporting Support
    • Payroll coordination guidance
    • Sales tax tracking
    • Assistance with reporting requirements
  • QuickBooks Services

    Yes, we help with QuickBooks. Whether you need setup, review, cleanup, or ongoing QuickBooks bookkeeping support, we can evaluate your system and help keep it organized.

    Explore Bookkeeping Services

What Small Business Owners Care About

“Can you help my business taxes and books?”

 Yes. We provide integrated support so financial records and tax filings align.


“Do you help with QuickBooks?”

 Yes. QuickBooks services include review, transaction oversight, and structural guidance.


“I don’t have time to manage everything.”

 Our structured monthly process helps keep records current, so you’re not scrambling during tax season or loan applications.

Clear Deliverables for Growing Businesses

Small businesses often want clarity on what’s included. Our services commonly support:


  • Monthly financial statements
  • Bank reconciliation
  • Cash flow management review
  • Budget discussions
  • Coordination with tax planning


Reliable reporting improves decision-making and strengthens long-term growth.

Secure & Convenient for Busy Owners

We provide secure document exchange through our client portal, making it easy to upload files without relying on email attachments. Online payment options streamline billing, and direct phone access to our Aurora office ensures you can speak with someone when questions arise.



Local office support means you’re working with a team you can reach—not a distant call center.

Serving Aurora & the Denver Metro Area

Our office is located in Aurora, and we serve business owners across Denver, Centennial, Colorado Springs, and surrounding communities. Since 1986, Mark Christiansen Associates LLC has supported local entrepreneurs with consistent, relationship-based service.

Ready to Simplify Your Business Finances?

If you’re looking for a small business accountant in Aurora CO who provides bookkeeping, tax preparation, and planning in one place, we’re here to help.