Cornerstone Accounting Solutions, LLC

Honesty. Expertise. Commitment. Value.

Grayscale Photo of Concrete Building



Recently established in 2023, Cornerstone Accounting Solutions offers affordable accounting resources and solutions to both individuals and businesses of all sizes.

cor•ner•stone - something that is essential, indispensable, or basic; the chief foundation on which something is constructed or developed



Two Diverse Business Partners Shaking Hands


Full Charge Accounting / Bookkeeping

Let us take care of your financials so you can focus on growing your business.


Payroll / Payroll Tax Filing

We can prepare and file monthly, quarterly, and annual payroll taxes.



Our Certified QuickBooks ProAdvisor can assist you with QuickBooks setup, training, payroll, consultations, & more



General Ledger cleanup, A/P, A/R, account reconciliations, financial statement compilation, financial analysis, debt covenant compliance, consultations, & more

About Us

Sarah Koder is a licensed CPA that lives in Aurora, CO with her family. After spending over twenty years in various roles in Corporate America, she started Cornerstone Accounting Solutions to help small businesses grow and expand.

She is passionate about helping small business owners solidify their accounting foundation so they can focus on where their time and energy really counts - with their families and running their companies. She also enjoys consulting for Corporations on best practices, process improvements, and general operational accounting.

In her free time, she enjoys spending time with her two children, rescued dogs (Daisy and Zorro), and a rescued bunny rabbit (Chopper). They love taking advantage of the Colorado outdoors going camping, fishing, and more! They also appreciate movie nights, game nights, and other "forced family fun" time.

Let's work together.

Team of Business People Working Together

Free Consultation

Schedule time using the calendar link below!

Phone Number

(720) 473-9533

Email Address

Mailing Address

18555 E. Smoky Hill Road

PO Box 460284

Aurora, CO 80046