Mark J. Ackerman


Partner Emeritus
New York – Woodbury

516.921.8900 / Ext. 10530Contact

Professional Experience

Mark J. Ackerman is a Partner Emeritus of Prager Metis CPAs, a member of Prager Metis International.  Mark has over 40 years of experience in the accounting industry.

Due to his expertise, Mark has developed a diverse client base that includes real estate, family planning, insurance brokers and underwriters, construction contractors and staffing and court reporting agencies.

In addition to his focus on new business and client development, over the past two years, he has led the Long Island office in developing the family planning, estates, trusts, and guardianship accounting areas for the firm.

Mark built a solid practice over four decades on the strength of his work ethic, integrity, and responsive service. He has an ongoing commitment to provide his clients with the best possible service and personal attention.

Professional Affiliations

  • American Institute of Certified Public Accountants
  • New York State Society of Certified Public Accountants
  • Affordable Housing Association of CPAs
  • Estate Planning Council of Nassau County - Board of Directors
  • Society of Trusts & Estate Practitioners (STEP)
  • NY State Broker License in Life, Accident, Health & Travel Insurance


  • Long Island Business News' 2016 Business and Finance Award


  • BS, Accounting, St. John’s University, New York

Civic Affiliations

  • Contractors for Kids Board of Directors
  • Estate Planning Council of Nassau County - Treasurer

Portability of the Unused Spousal Exclusion

The Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010 introduced the concept of portability. Portability allows the executor of a deceased spouse’s estate to transfer any unused estate tax exemption to the surviving spouse, as long as the surviving spouse was a US citizen or resident. In simple terms, portability of the federal estate tax exemption between married couples means that if the first spouse dies and the value of the estate does not require the use of all of the deceased spouse’s federal exemption from estate taxes, then the amount of the exemption not used for the deceased spouse’s estate may be added to the surviving spouse’s exemption when the surviving spouse later dies.

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Social Security Retirement Benefits

Social Security was created in 1935 to help Americans supplement their retirement income. The idea of Social Security is universal for Americans, but it is a complex system and can often cause confusion. Full retirement age is the age at which you can begin to collect full Social Security retirement benefits without any reductions.

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Prager Metis Partner Mark Ackerman Honored with Business & Finance Award

Prager Metis CPAs, an independent, full-service public accounting and consulting firm with offices in the U. S. and London, is very proud to announce that Partner Mark Ackerman has been honored with the 2016 Long Island Business News’ Business & Finance Award. Long Island Business News’ Business & Finance Awards recognizes financial professionals for their outstanding performance as stewards of Long Island’s corporations, government and not-for-profits organizations.

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