Profits don't happen by accident... We help you build them.
Accounting is what we do best.
Advanced Tax Consulting is licensed in OR and specializes in Virtual Tax Strategy. We are professional, experienced, and affordable. We offer a broad range of services for business owners, executives, and independent professionals.
Today's tax laws are complicated.
Filing a relatively simple return can be confusing. It is just too easy to overlook deductions and credits to which you are entitled. Even if you use a computer software program there's no substitute for the assistance of an experienced tax professional.
About Us
Theban L Tonnesen, EA, LTC
Theban founded Advanced Tax Consulting, Inc. over 20 years ago to provide expert tax strategy and financial advisory services to growing businesses. With a 25-year career that includes experience as a Tax Manager and senior advisor, he has successfully guided construction firms, startups, and expanding companies through complex financial and compliance challenges.
Theban combines technical tax knowledge with CFO-level insight to help business owners gain clarity, improve cash flow, and strengthen their financial systems.
His approach emphasizes practical solutions that reduce tax liabilities, enhance profitability, and support long-term stability. Through tailored CFO services and forward-looking tax strategies, Theban empowers business owners with the tools and confidence needed to scale their businesses quickly and effectively.
Tax Preparation for Businesses
We Specialize in Business Tax Preparation
As a business owner, your focus is on growth—not balancing books or navigating tax codes. That’s where we come in. Our team provides year-round accounting and tax support, so you can focus on what matters most: running your business.
Our Services
- Federal & state tax preparation and filing
- Payroll and sales tax compliance
- Profit and loss statements
- Entity setup and structure (LLC, S-Corp, C-Corp)
- Tax planning to minimize liability
- Mergers and acquisitions
Stay Compliant, Avoid Penalties
We help you meet all tax deadlines and stay compliant with IRS, state, and local regulations—so you never face costly fines or missed filings again.
Trusted Advisors for Your Business
Our experienced team partners with you year-round to improve profitability and ensure financial peace of mind.
Call us today or request a consultation to get started.
Tax Advisory
Start Planning Your Financial Future Today
If your tax bill feels too high, you’re not alone—and it doesn’t have to stay that way. Our accounting firm is here to help you plan smarter and pay less.
Your Financial Success Is Our Priority
We go beyond tax filing to build year-round strategies that protect your income and grow your wealth. Here’s how we help:
- Maximize every deduction and tax credit you deserve
- Set up simple, IRS-compliant recordkeeping systems
- Review withholdings to ensure you’re not overpaying
- Develop personalized tax planning to lower future bills
- Advise on retirement and investment strategies for tax savings
Take Control of Your Taxes
If too much of your money ends up with the IRS, let’s fix that.
Call us today or fill out the form below to start keeping more of what you earn.
Fractional CFO Services
CFO Services: A Cost-Effective Solution for Your Business
Managing your company’s finances can be overwhelming — especially when your focus is on growth. Many small businesses can’t justify a full-time CFO, but still need expert financial guidance. That’s where our outsourced CFO services come in.
Expert Financial Guidance, When You Need It
Our experienced financial professionals help you make informed business decisions, improve profitability, and plan for long-term success — all at a fraction of the cost of an in-house CFO. We’ll help you understand your numbers so you can move forward with confidence.
Our CFO Services Include:
- Monthly, quarterly, and annual financial statements
- Forecasting and cash flow management
- Accounts payable and receivable
- Strategic tax planning and compliance
- Profitability analysis and business growth guidance
- Accounting system setup and controls
Your Trusted Financial Partner
Whether you’re launching a start-up or expanding your operations, our CFO team provides the insights and strategy to help your business thrive.
Contact us today to schedule a consultation and discover how our fractional CFO services can help your business grow smarter and stronger.
Business Startups
Helping You Build the Foundation for a Successful Business
Starting a new business is exciting—but success takes more than a great idea. Choosing the right structure, managing taxes, and setting up sound accounting systems are key to building a strong foundation. That’s where we come in.
How We Help
- Choose the best business entity to meet your goals and minimize taxes
- Develop partnership agreements and business plans for funding
- Set up accounting systems, billing, and cash flow management
- Ensure compliance with state, local, and federal tax laws
- Prepare annual and quarterly tax filings
- Assist with business licenses, permits, and insurance
Plan for Success
Careful planning is the key to long-term success. Avoid costly mistakes by working with experienced advisors who can guide you through every step.
Ready to bring your vision to life? Call us today or fill out the form below to get started.