Timothy Decker


ISI Financial Group, Inc.

President & CEO

Timothy Decker


ISI Financial Group, Inc.

President & CEO

As a fee-only financial planner, my focus is to offer unbiased financial advice to help you achieve your life goals. - Timothy Decker, AIF®, PPC™®

(717) 393-3353

Fee Only Financial Planner Located in Lancaster, PA and Serving Clients Worldwide

Timothy Decker is a Lancaster, PA fee-only financial planner. ISI Financial Group, Inc. provides comprehensive and objective financial planning, wealth management, and 401(k) solutions to help individuals, charitable and religious organizations, business owners and corporations organize, grow and protect their assets through life’s transitions. As a fee-only, fiduciary, and independent financial advisor, Timothy Decker is never paid a commission of any kind, and has a legal obligation to provide unbiased and trustworthy financial advice.

An independent, fee-only financial advisor with over 31 years of experience, Tim Decker has helped clients maximize financial security for themselves, their loved ones, and even their employees.   With hard work, integrity, and genuine concern for each client, Tim, along with his caring staff of many years, has built ISI Financial Group into a respected financial advisory firm managing over $300 million in assets for clients.

Tim’s "Sleep-Well-at-Night" approach to wealth management resonates with clients who value a sincere effort to make them comfortable with their investments. Tim knows that trust and confidence are the primary factors when clients ask him to manage their financial affairs. It is that same trust and confidence that leads clients to refer their friends, family and colleagues. Finally, knowing that Tim invests his own money in the same investment vehicles that he recommends to his clients helps them feel secure in their choice to work with ISI Financial Group.

Tim is proud to be a fee-only financial advisor and fiduciary. He has received formal training in investment fiduciary responsibility and has earned the Accredited Investment Fiduciary® professional designation (AIF®), awarded by the Center for Fiduciary Studies, associated with the University of Pittsburgh. The Center for Fiduciary Studies owns the marks AIF® and AIFA®, which it awards to individuals who successfully complete initial and ongoing accreditation requirements.

Tim also holds the designation of Professional Plan Consultant (PPC) and is a member of the National Association of Personal Financial Advisors (NAPFA).

Timothy Decker is a Member of the National Association of Personal Financial Advisors

The National Association of Personal Financial Advisors (NAPFA) is a leading professional association of Fee-Only financial advisors - highly trained professionals who are committed to working in the best interests of those they serve.

NAPFA members live by three important values:

  • To be the beacon for independent, objective financial advice for individuals and families.
  • To be the champion of financial services delivered in the public interest.
  • To be the standard bearer for the emerging profession of financial planning.

A Fee-Only Financial Planning Fiduciary and Wealth Management Firm

ISI Financial Group is a Fee-Only financial planning and wealth management firm. ISI provides comprehensive financial planning and fee-only wealth management services for individual and institutional clients, including 401(k) services and management. As a member of the National Association of Personal Financial Advisors (NAPFA), we are bound to a written fiduciary oath to always represent our clients’ best interests in all we do.


The Sleep-Well-At-Night Investor Approach

The Sleep-Well-At-Night Investor approach to financial planning and wealth management is designed to help achieve financial freedom. For our clients, it’s the freedom to put their focus and energy on the important areas of their life such as family, hobbies, and much more. We help clients achieve this by assisting them in developing a personalized, comprehensive financial plan that can help them achieve their financial goals.

We take the time to get to know our clients, their families, and especially their dreams and aspirations. Working together we develop “what if” and “financial fire drill” scenarios that are unique and personal to each client. The result is a personalized, comprehensive plan built using prudent, time-tested strategies customized for each client.

Once a financial plan is developed, we help our clients implement their customized plan and provide regular monitoring to help ensure desired results are achieved.

Our Sleep-Well-At-Night Investor approach to wealth management isn’t speculative. We don’t use crystal balls trying to gamble against the markets. Instead, we build portfolios to capture the returns the market will inherently deliver over time using, when appropriate, institutional, low-cost, efficient investment vehicles that also minimize tax liability.

We also can provide clients access to, when appropriate, investments at Vanguard and Dimensional Fund Advisors (DFA) that are available only via select, fee-only advisors.

Fee-Only, Fiduciary, Independent: Three Important Criteria to Consider When Choosing a Financial Advisor.


  • Comprehensive Financial Planning
  • Retirement Income Planning
  • Investment Management
  • College Education Planning
  • Tax Planning

Ideal Clients

  • Retirees and Near Retirees
  • Growing Families
  • Business Owners and Executives
  • Sudden Money Situations
  • Novice Investors

Working Together

  • In-Office Meetings
  • Virtual Meetings
  • Clearly Defined Fees
  • No Product Sales

Professional Designations & Affiliations

  • National Association of Personal Financial Advisors (NAPFA)
    Timothy Decker is a NAPFA-Registered Financial Advisor

    The National Association of Personal Financial Advisors (NAPFA) is a leading professional association of Fee-Only financial advisors—highly trained professionals who are committed to working in the best interests of those they serve.

  • Accredited Investment Fiduciary®
    Timothy Decker is an Accredited Investment Fiduciary® (AIF)

    Accredited Investment Fiduciary® (AIF®) training empowers investment professionals with the fiduciary knowledge and tools they need to serve their clients’ best interests. Advisors who have earned the Accredited Investment Fiduciary designation have gone through training, met the qualifications, and passed the exam allowing use of the AIF designation and they are immediately able to demonstrate the added value that they can bring to both existing and prospective clients.

  • Dimensional Funds
    ISI Financial Group, Inc. is an Approved Dimensional Funds Advisor

    Dimensional believes an advisor can work closely with you to understand your financial needs and provide a range of wealth management services, while encouraging the discipline essential to long-term investment success. Financial advisors who work with Dimensional operate independently from Dimensional and vary in the extent to which they use Dimensional funds.

  • Professional Plan Consultant
    Timothy Decker is a Professional Plan Consultant™

    Advisors specifically interested in building their retirement plan advisory business pursue the Professional Plan Consultant® (PPC®) Designation. This training course teaches advisors a framework for managing successful and compliant 401(k) plans. Those who successfully earn their PPC® Designation demonstrate to clients and prospects their knowledge of ERISA requirements for employer-sponsored retirement plans and their ability to carry out plan services with a fiduciary standard of care.

Contact Timothy Decker

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Office Locations:

  • 570 Lausch Lane
    Suite 100
    Lancaster, PA 17601

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