# Ken Diehl

> Ken Diehl is a fee-only financial advisor at Cornerstone Financial Planning, Inc. in Gaithersburg, Maryland, who holds the BS, CFP and CPA credentials. Ken charges an ongoing planning fee.

Page: https://find.wellspent.co/advisors/ken-diehl/
Built from public directory listings; last checked October 28, 2026.

## Facts

- **Firm:** Cornerstone Financial Planning, Inc.
- **Based in:** Gaithersburg, Maryland
- **Fee model:** Ongoing planning fee
- **Credentials:** BS, CFP, CPA
- **CRD:** 4566943 (https://adviserinfo.sec.gov/individual/summary/4566943)
- **SEC registration:** Investment adviser representative in MD
- **Disclosures:** None reported
- **Website:** http://cornerstonefinancialplanning.com

## Frequently asked questions

### Is Ken Diehl a fee-only financial advisor?

Yes. Ken Diehl is listed in the NAPFA directory (NAPFA admits only fee-only advisors). SEC records as of October 27, 2026 show no broker registration and no commission compensation reported by Ken's firm.

### How does Ken Diehl charge for financial advice?

Ken Diehl charges an ongoing planning fee.

### Where is Ken Diehl based?

Ken Diehl is based in Gaithersburg, Maryland.

### What credentials does Ken Diehl hold?

Ken Diehl holds the BS, CFP and CPA credentials.

### Is Ken Diehl registered with the SEC?

Yes. Ken Diehl is registered as an investment adviser representative in MD (CRD 4566943), per SEC Investment Adviser Public Disclosure data as of October 27, 2026.

### How do I contact Ken Diehl?

Through Ken Diehl's website, cornerstonefinancialplanning.com.

## Sources

- NAPFA directory listing (https://www.napfa.org/find-an-advisor/firm/1725): NAPFA admits only fee-only advisors
- SEC Investment Adviser Public Disclosure and Form ADV: registration, exams, and firm facts, data as of October 27, 2026
- The firm's website (https://www.cornerstonefinancialplanning.com/): specialties, clients served, and fees, checked October 28, 2026

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Source: Wellspent, the public graph of fee-only advisors (https://find.wellspent.co). No paid placement.