Trust Services
401k Sponsorships
IRA Retirement Plans
The South Dakota Advantage
Build, Manage, and Preserve Wealth for Generations to Come
Cornerstone Private Asset Trust Company, LLC, is boutique trust company that helps businesses and individuals implement estate planning goals and transition wealth from one generation to the next. It provides services above and beyond those of a traditional trust company by focusing on the individual nature of each client and their long-term goals.
An independent public trust company based in Sioux Falls, South Dakota, Cornerstone provides unique tax advantages to its clients as well as a wide variety of specialized trust services, including trusts under wills as well as dynasty, charitable, revocable living trusts.
In the retirement plan area, Cornerstone develops plans to meet the needs of the employees, the company and the owners. It specializes in working with business owners who excel at running their businesses, but do not want to be experts in retirement planning. Cornerstone works as a retirement planning partner keeping business owners informed on the status of their plans as well as their fiduciary responsibility as the plan sponsor of the company’s retirement program.
Contact Us
Download Our Free App
We’ve built a handy mobile app that allows you to easily stay in touch with us on-the-go wherever you are. Ask us questions, send and receive secure messages, request an appointment, get directions to our office, receive helpful notifications, and more.
Helpful Content
Choosing a Mortgage
Selecting a mortgage isn't an easy process. Get a better understanding of how professionals make the right decisions.
A House Divided
By understanding a few key concepts during a divorce, you may be able to avoid common pitfalls.
Coaches
Coaches have helped you your whole life, in ways big and small. We’d like to be one of them.
When Couples Know TV Over Finances
Bonding with your significant other over TV plots is fun but when you know more about them than your money picture.....
Infographic: Who Sits at Your Table?
Infographic: Who Sits at Your Table?
Revising Estate Strategy Assumptions
Estate tax exemptions rules appear to be stabilizing, prompting many to reconsider conventional estate strategies.
Understanding the Alternate Valuation Date
Executors can value the estate on the date of death, or on its six-month anniversary —the “Alternate Valuation Date."
Social Security: The Elephant in the Room
Some people wonder if Social Security will remain financially sound enough to pay the benefits they are owed.
Find That Lost Retirement Account
With over 24 million “forgotten” 401(k) accounts, you may be surprised to learn of your unclaimed “found” money.
View all articles 
Taxable vs. Tax-Deferred Savings
Use this calculator to compare the future value of investments with different tax consequences.
Comparing Investments
This calculator compares the net gain of a taxable investment versus a tax-favored one.
What Is My Life Expectancy?
Estimate how many years you may need retirement assets or how long to provide income to a surviving spouse or children.
Annuity Comparison
This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year.
Federal Income Tax
Use this calculator to estimate your income tax liability along with average and marginal tax rates.
How Compound Interest Works
Use this calculator to better see the potential impact of compound interest on an asset.
View all calculators
Managing Your Lifestyle
Using smart management to get more of what you want and free up assets to invest.
5 Smart Investing Strategies
There are some smart strategies that may help you pursue your investment objectives
Principles of Preserving Wealth
How federal estate taxes work, plus estate management documents and tactics.
Your Cash Flow Statement
A presentation about managing money: using it, saving it, and even getting credit.
An Inside Look at Retirement Living
A number of questions and concerns need to be addressed to help you better prepare for retirement living.
5 Smart Investing Principles
Principles that can help create a portfolio designed to pursue investment goals.
View all presentations
The Fed and How It Got That Way
Here is a quick history of the Federal Reserve and an overview of what it does.
Estate Management 101
A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate.
When Do You Need a Will?
When do you need a will? The answer is easy: Right Now.
Charitable Giving: Smart from the Heart
Do you have causes that you want to support with donations?
Where Is the Market Headed?
We all know the stock market can be unpredictable. We all want to know, “What’s next for the financial markets?”
Leaving Your Lasting Legacy
Want to do more with your wealth? You might want to consider creating a charitable foundation.