Billings' Trusted Financial Partner

Your Financial Future Starts Right Here in the Heart of Montana

Expert accounting, tax strategy, and business advisory services for the individuals and companies that drive the Big Horn Valley forward.

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What We Do

Comprehensive Financial Services for Every Stage

From personal tax preparation to complex business advisory, we deliver the clarity you need to make confident financial decisions.

Tax Preparation & Planning

Strategic tax planning that minimizes liability and maximizes returns for individuals, families, and businesses across Montana.

Bookkeeping & Accounting

Accurate, timely bookkeeping that keeps your finances organized and your business running smoothly throughout the year.

Financial Advisory

Comprehensive financial planning and advisory services to help you navigate complex decisions with confidence and clarity.

Small Business Solutions

Tailored accounting solutions for Montana small businesses — from formation and compliance to growth strategy and cash flow management.

IRS Resolution & Representation

Expert assistance with IRS audits, disputes, and tax debt resolution. We stand between you and the complications of tax authority interactions.

Payroll Services

Reliable payroll processing and compliance management so you can focus on what you do best — running your business.

Mangis Accounting office in Billings, Montana

About Us

Rooted in Billings, Committed to Your Success

Mangis Accounting was founded on a simple belief: that every individual and business in the Big Horn Valley deserves access to expert financial guidance. Based at 923 Broadwater Square, we've built our practice on the values that define this community — integrity, hard work, and a genuine investment in our clients' futures.

We understand that Montana's financial landscape is unique. Whether you're managing a ranch, running a growing enterprise downtown, or planning for your family's future, we bring local knowledge and professional rigor to every engagement.

Serving Billings & Greater Montana
Local Billings-Based Practice
Personal Direct Client Relationships

Why Mangis Accounting

The Difference Is in the Details

We combine professional expertise with a personal touch that makes working with us straightforward and rewarding.

01

Personalized Attention

Every client receives direct, personalized service. You'll work with a dedicated advisor who understands your unique situation and goals.

02

Local Expertise

As a Billings-based firm, we understand Montana's tax laws, business environment, and the specific financial challenges facing our community.

03

Proactive Approach

We don't just prepare your taxes when April approaches. We proactively identify opportunities and strategies throughout the year.

04

Clear Communication

No jargon, no confusion. We explain your financial situation in plain language so you can make informed decisions with confidence.

Ready to Take Control of Your Finances?

Schedule a consultation with Mangis Accounting and discover how we can help you achieve your financial goals right here in Billings.

Call 406-252-5550 Email Us Today

Get In Touch

Let's Start a Conversation

Whether you have a question or are ready to schedule your consultation, we're here to help. Reach out by phone, email, or visit us at our Broadwater Square office.

Office Address 923 Broadwater Sq
Billings, MT 59101
Phone 406-252-5550
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