• Member Statistics

    • 783,254 Colleagues-to-Date [Sponsored by a generous R&D grant from iMBA, Inc.]
  • David E. Marcinko [Editor-in-Chief]

    As a former Dean and appointed Distinguished University Professor and Endowed Department Chair, Dr. David Edward Marcinko MBA was a NYSE broker and investment banker for a decade who was respected for his unique perspectives, balanced contrarian thinking and measured judgment to influence key decision makers in strategic education, health economics, finance, investing and public policy management.

    Dr. Marcinko is originally from Loyola University MD, Temple University in Philadelphia and the Milton S. Hershey Medical Center in PA; as well as Oglethorpe University and Emory University in Georgia, the Atlanta Hospital & Medical Center; Kellogg-Keller Graduate School of Business and Management in Chicago, and the Aachen City University Hospital, Koln-Germany. He became one of the most innovative global thought leaders in medical business entrepreneurship today by leveraging and adding value with strategies to grow revenues and EBITDA while reducing non-essential expenditures and improving dated operational in-efficiencies.

    Professor David Marcinko was a board certified surgical fellow, hospital medical staff President, public and population health advocate, and Chief Executive & Education Officer with more than 425 published papers; 5,150 op-ed pieces and over 135+ domestic / international presentations to his credit; including the top ten [10] biggest drug, DME and pharmaceutical companies and financial services firms in the nation. He is also a best-selling Amazon author with 30 published academic text books in four languages [National Institute of Health, Library of Congress and Library of Medicine].

    Dr. David E. Marcinko is past Editor-in-Chief of the prestigious “Journal of Health Care Finance”, and a former Certified Financial Planner® who was named “Health Economist of the Year” in 2010. He is a Federal and State court approved expert witness featured in hundreds of peer reviewed medical, business, economics trade journals and publications [AMA, ADA, APMA, AAOS, Physicians Practice, Investment Advisor, Physician’s Money Digest and MD News] etc.

    Later, Dr. Marcinko was a vital recruited BOD member of several innovative companies like Physicians Nexus, First Global Financial Advisors and the Physician Services Group Inc; as well as mentor and coach for Deloitte-Touche and other start-up firms in Silicon Valley, CA.

    As a state licensed life, P&C and health insurance agent; and dual SEC registered investment advisor and representative, Marcinko was Founding Dean of the fiduciary and niche focused CERTIFIED MEDICAL PLANNER® chartered professional designation education program; as well as Chief Editor of the three print format HEALTH DICTIONARY SERIES® and online Wiki Project.

    Dr. David E. Marcinko’s professional memberships included: ASHE, AHIMA, ACHE, ACME, ACPE, MGMA, FMMA, FPA and HIMSS. He was a MSFT Beta tester, Google Scholar, “H” Index favorite and one of LinkedIn’s “Top Cited Voices”.

    Marcinko is “ex-officio” and R&D Scholar-on-Sabbatical for iMBA, Inc. who was recently appointed to the MedBlob® [military encrypted medical data warehouse and health information exchange] Advisory Board.



  • ME-P Information & Content Channels

  • ME-P Archives Silo [2006 – 2020]

  • Ann Miller RN MHA [Managing Editor]

    USNews.com, Reuters.com,
    News Alloy.com,
    and Congress.org

    Comprehensive Financial Planning Strategies for Doctors and Advisors: Best Practices from Leading Consultants and Certified Medical Planners(TM)

    Product Details

    Product Details

    Product Details


    New "Self-Directed" Study Option SinceJanuary 1st, 2018
  • Most Recent ME-Ps

  • PodiatryPrep.org

    Lower Extremity Trauma
    [Click on Image to Enlarge]

  • ME-P Free Advertising Consultation

    The “Medical Executive-Post” is about connecting doctors, health care executives and modern consulting advisors. It’s about free-enterprise, business, practice, policy, personal financial planning and wealth building capitalism. We have an attitude that’s independent, outspoken, intelligent and so Next-Gen; often edgy, usually controversial. And, our consultants “got fly”, just like U. Read it! Write it! Post it! “Medical Executive-Post”. Call or email us for your FREE advertising and sales consultation TODAY [770.448.0769]

    Product Details

    Product Details

  • Medical & Surgical e-Consent Forms

  • iMBA R&D Services

    Commission a Subject Matter Expert Report [$250-$999]January 1st, 2019
    Medical Clinic Valuations * Endowment Fund Management * Health Capital Formation * Investment Policy Statement Analysis * Provider Contracting & Negotiations * Marketplace Competition * Revenue Cycle Enhancements; and more! HEALTHCARE FINANCIAL INDUSTRIAL COMPLEX
  • iMBA Inc., OFFICES

    Suite #5901 Wilbanks Drive, Norcross, Georgia, 30092 USA [1.770.448.0769]. Our location is real and we are now virtually enabled to assist new long distance clients and out-of-town colleagues.

  • ME-P Publishing


    If you want the opportunity to work with leading health care industry insiders, innovators and watchers, the “ME-P” may be right for you? We are unbiased and operate at the nexus of theoretical and applied R&D. Collaborate with us and you’ll put your brand in front of a smart & tightly focused demographic; one at the forefront of our emerging healthcare free marketplace of informed and professional “movers and shakers.” Our Ad Rate Card is available upon request [770-448-0769].

  • Reader Comments, Quips, Opinions, News & Updates

  • Start-Up Advice for Businesses, DRs and Entrepreneurs

    ImageProxy “Providing Management, Financial and Business Solutions for Modernity”
  • Up-Trending ME-Ps

  • Capitalism and Free Enterprise Advocacy

    Whether you’re a mature CXO, physician or start-up entrepreneur in need of management, financial, HR or business planning information on free markets and competition, the "Medical Executive-Post” is the online place to meet for Capitalism 2.0 collaboration. Support our online development, and advance our onground research initiatives in free market economics, as we seek to showcase the brightest Next-Gen minds. ******************************************************************** THE ME-P DISCLAIMER: Posts, comments and opinions do not necessarily represent iMBA, Inc., but become our property after submission. Copyright © 2006 to-date. iMBA, Inc allows colleges, universities, medical and financial professionals and related clinics, hospitals and non-profit healthcare organizations to distribute our proprietary essays, photos, videos, audios and other documents; etc. However, please review copyright and usage information for each individual asset before submission to us, and/or placement on your publication or web site. Attestation references, citations and/or back-links are required. All other assets are property of the individual copyright holder.
  • OIG Fraud Warnings

    Beware of health insurance marketplace scams OIG's Most Wanted Fugitives at oig.hhs.gov

Interest Rates and the Money Commodity

Medial Office Equipment Interest Rate Costs

David Edward Marcinko

Dr. David E. Marcinko; MBA, CMP™

[Publisher in Chief]

Physicians, administrators and healthcare entrepreneurs are aware of the compounding effect of interest. However, since interest is deductible as a medical office business expense, many seem to forget about it despite the fact that it must be continually paid until the asset is either purchased or otherwise disposed. 

So, what are the various types of interest rates important to the medical practitioner and commodity – money?

[1] Simple Interest

Simple interest is merely the pro rata interest on a loan or deposit and represents the most basic interest rate type.

For example, for every $100 Dr. Bill borrows at 12 percent annual interest, he pays twelve dollars per year. The interest is calculated by multiplying the principal or original amount, by the interest rate in decimal form (100 x .12). 

[2] Add-On Interest

Add on interest immediately attaches the annual interest amount, to the principal amount, at the beginning of the payment period. Payments are then made according to the number of years required.

The following formula is useful: 

Add-on-Interest minus Payment  = Total Interest on Balance/Number of Payments

For example, if Dr. William Needy borrows $10,000 at 8 percent add-on interest, he will repay $10,000 plus $ 800 ($10,000 x 8%) or $10,800, divided by twelve months, for a total of $900 per month, since $ 900/month x 12 months equals $10,800.  

[3] Discounted Interest

When using the discounted interest method, the interest amount is deducted from the principal right up front. Notice that this is the opposite of add-on-interest that is applied up front.

For example, if Dr. Bill borrows the same $ 10,000 at a discounted interest rate of 8 percent, he will only receive a $9,200 loan, since $10,000 – $800 is $9,200.

Obviously, the discount method is the most expense way to borrow money.  

[4] Annual Percentage Rate

 Most financial institutions advertise an annual percentage rates (APR) for loans, deposits and investments.  The APR is the periodic interest rate multiplied by the number of periods a year. If the APR is 12 percent, and interest is compounded monthly, you receive (or pay) 1 percent of your balance each month, and the balance shifts with each compounding. 

For example, if Dr. Bill deposits $ 100 dollars at 12 percent APR compounded monthly, he receives $ 1 interest the first month (1% of $100), $1.10 the second month (1% of $101), and so forth. If compounding is daily, the interest accumulates at the rate of 1/365 of the APR each day.  

Unless interest is compounded annually, the APR will be lower than the effective annual interest rate, discussed below. 

[5] Effective Interest Rate

It is important to differentiate between the effective interest rate and the APR, which is often the most prominent figure in advertisements for medical business equipment, consumer goods and financial services (loans, annuities, IRAs, CDs, investment analysis, college funding or retirement planning).  Although the APR is the periodic interest rate multiplied by the number of periods per year, the effective annual interest rate is the periodic rate, compounded. 

In our case, if the APR is 12 percent, compounded monthly, the monthly interest rate is 1 percent and the effective annual rate is the monthly rate compounded for 12 periods.

Therefore, if your calculation is for a single year, you can treat the effective rate as simple interest. If you deposit (or borrow) $1,000 at 12 percent APR, the effective rate is 12.68 percent, and interest for the first year is about $126.80 (12.68% of $1,000).

For longer periods, you can use the effective interest rate as the periodic interest rate, compounded annually. 

[a] “Rule of 72” (Double your Money)

The number of periods required to double a lump sum of money can be quickly estimated by using what is known as the “Rule of 72”. To get the number of periods, usually years, just divide 72 by the periodic interest rate, expressed as a whole number (not a decimal).

For example, if the annual interest rate is 10 percent, it will take about 7.2 years (72/10) to double any lump cache of money. Conversely, you can also calculate the interest rate required to double your money in a given period by dividing 72 by the term.

Thus, to double your money in ten years, you need to earn about 7.2 percent annual interest (72/10) = 7.2%).  

[b] “Rule of 78”

According to this method, interest is front end loaded like a home mortgage, or office condominium, to discourage prepayment of a loan and consequently preserve the lender’s profit. In other words, it is a method of calculating installment loan interest rebates. 

The number 78 comes from an approved method of accelerated tax depreciation, known as the “Sum of the Years Digits” (SOYD) method (i.e., 12 + 11 + 10 + 9 . . . = 78). This fact is important because, throughout the period of a loan, even though the payments are all the same, the portions that are interest and principal are very different.

Using this method for a one year loan shows that, in the first payment, 15.38 percent of the interest due is paid off, and by the sixth month, 73.08 percent of the interest is paid off.  This means, that if a physician makes a one year equipment loan with a total interest charge of $ 100 and pays the loan off in full with the sixth payments, he or she will not get an interest rebate of $ 50, but only $ 26.92, since $ 73.08 of the interest has already been prepaid. 

Most ethical lenders use simple interest rates for loan rebates, and the Rule of 78 is unfair according to many authorities.  

[c] “Rule of 116”

A derivative of the Rule of 72 is the Rule of 116.  This determines the number of years it takes for a principal amount to be tripled and is calculated by dividing the annual interest rate into 116.

The Rules of 72 and 78 are very handy for figuring the amount of interest payments made or growth of funds invested. They can also be used in reverse to calculate at what rate of interest money must be invested to double or triple in a certain number of years.     

[6] Medical Equipment Payback Cost Analysis

The payback period, expressed in years, is the length of time that it takes for the medical equipment investment to recoup its initial cost out of the cash receipts it generates. The basic premise is that the quicker the cost of an investment can be recovered, the better the investment is. It is most often used when considering equipment whose useful life is short and unpredictable.

When the same cash flow occurs every year, the formula is as follows: 

Investment Required / Net Annual Cash Inflow = Payback Period 

Thus, in today’s tightening medical reimbursement atmosphere, practice cost control and expense reduction is the easiest method to increase medical office profitability.  Keeping the cost of the commodity money in the form of interest rate charges, as low as possible, will assist in this endeavor 


And so, how have these rules affected your medical office borrowing costs; if at all? Does these principles apply to the medical student loan crisis, today? 


Risk Management, Liability Insurance, and Asset Protection Strategies for Doctors and Advisors: Best Practices from Leading Consultants and Certified Medical Planners™8Comprehensive Financial Planning Strategies for Doctors and Advisors: Best Practices from Leading Consultants and Certified Medical Planners™

One Response

  1. […] Interest Rates and the Money Commodity. Medial Office Equipment Interest Rate Costs. By Dr. David E. Marcinko; MBA, CMP™ Publisher in Chief. Physicians, administrators and healthcare entrepreneurs are aware of the compounding effect of interest. However, since interest is …Healthcare Financials … the post – https://healthcarefinancials.wordpress.com […]


Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: