This is Who We Are.

Preston Financial Group is here to make the money side of business feel a whole lot less stressful—especially for real estate pros and business owners juggling a million moving parts. We bring tax strategy, bookkeeping, and payroll together in one place, so you’ve got one team, one process, and way fewer headaches.

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We keep things simple, so you can focus on what matters.

Clear steps. Clean reporting. Straight answers. No jargon, no runaround—just organized finances, consistent communication, and a plan that keeps you prepared (not surprised) at tax time.

Our Team.

Mason Gilani

CEO & Founder

Mason Gilani (birth name: Masoud Koohgilani) leads Preston Financial Group with one mission: make the financial side of life and business feel clear, calm, and under control. Originally from Iran, Mason is bilingual and works with clients in both English and Farsi, which helps many individuals and families feel comfortable asking questions, understanding their options, and making confident decisions.

Mason is known for a straightforward style—clear communication, fast follow-through, and clean, accurate work. The goal isn’t just to file returns—it’s to help clients understand why the numbers matter, what they’re telling you, and what to do next.

A big part of Mason’s work centers around business owners and real estate professionals who are juggling multiple moving parts—income streams, entities, properties, contractors, payroll, and deadlines. He helps bring structure to that complexity so clients can see where they stand, stay compliant, and make smarter decisions with real financial data. Whether you’re buying your next property, scaling your business, or just trying to get out of the “catch up” cycle, Mason’s approach is hands-on, practical, and designed to keep things simple.

Viktoryia Dzeraniuk

Executive Assistant

Viktoryia Dzeraniuk is the Executive Assistant at Preston Financial Group, keeping the day-to-day running smoothly behind the scenes. She helps coordinate schedules, client communication, and internal workflows so nothing slips through the cracks. If you’re reaching out, Viktoryia is often the friendly first point of contact—making sure you get routed quickly, questions get answered, and everything stays organized and on track.

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Simplify Your Business.

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+ YEARS

Of Turning Client's Dreams Into Reality

The Services That help your business grow and simplify your finances.

of satisfied clients choose us for financial support

01. Bookkeeping

02. Tax Prep

03. Payroll

04. Real Estate

Explore our Bookkeeping, Accounting, and Payroll Solutions.

Learn More About Our Services

Testimonials

Here's What Our Clients Say About Us...

They offer Top-Tier Accounting Services.

"I’ve had the pleasure of working with Mason at Preston Financial Group for over 7 years, and I can confidently say he is the best accountant I’ve ever worked with. His professionalism, deep knowledge, and attention to detail have consistently exceeded my expectations year after year."

Lori Trombley

Co-Owner

BCS Service Pros

Preston Financial Group Helped Us Grow Our Business.

"We’ve had an excellent experience with Preston Financial Group over the past four years. Mason is incredibly knowledgeable and consistently takes the time to explain things in a clear and understandable way. He’s always professional, approachable, and genuinely helpful."

Anahita Tabrizi

Director

Kids Lodge Montessori

Accounting You Can Trust.

"I’ve been working with Mason at Preston Financial Group for a few years now, and at this point, I can’t imagine trusting anyone else with our taxes. Before him, I always felt a little in the dark—like I was constantly reacting to tax season instead of understanding what was going on. Mason changed that for us.

He’s incredibly patient. Explains things clearly without ever talking down to you, which I really value. Our situation isn’t the easiest—personal taxes, a business, a couple of rental properties in North DFW, and filing as an S-corp—but he’s been able to handle all of it with ease. Or at least, he makes it look easy. I know there’s a lot going on behind the scenes."

Jason Rutel

Owner

Creative Nomads

They Handle The Numbers So We Can Focus on Excellent Service for Our Customers.

"Awesome group for business accounting and tax services. They always respond quickly and are great to work with. Let them handle the numbers and taxes so you can focus on your customers as they do. A recipe for success includes Preston Financial Group."

Jeff Upchurch

Owner

The Sandwich Spot, Frisco

Our Contractor Business is Booming Because of Preston Financial.

"A truly amazing partner. They go above and beyond to address our financial concerns and provide solutions that are to the point and practical. We're very happy working with them and would definitely recommend their services"

Ikbal Biniyaz

Owner

DPS 360, LLC

Best Accounting Team Ever!

"I’ve worked with Mason and Preston Financial Group since 2014, and they’ve been instrumental in managing all aspects of my financial life. From tax planning and preparation to complex financial decisions, Mason brings clarity, expertise, and genuine care to everything he does.

His professionalism, attention to detail, and responsiveness set him apart. I trust him completely, and thanks to his guidance, I’ve saved time, reduced stress, and made smarter financial choices."

Babak Aria

Owner

Buttermilk Cafe & Bakery

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This is Who We Are.

We keep things simple, so you can focus on what matters.