payable in cash or shares of our Class A common stock after consultation with the advisor. From January 1, 2020 to March 31, 2020, we paid our advisor 50% of its asset management fees in shares of our Class A common stock and 50% in cash. Beginning April 1, 2020, in order to help preserve liquidity, we paid 100% of its asset management fees in shares of our Class A common stock.
During 2020, we paid the advisor approximately $11.9 million in asset management fees. Our operating partnership paid approximately $7.2 million in distributions of available cash to an affiliate of our advisor pursuant to the operating partnership agreement.
In addition, in return for performing services related to CPA:18 – Global’s investment acquisitions, the advisor is paid acquisition fees for making investments or for the development or construction of properties (a portion of which is payable upon acquisition of investments, with the remainder subordinated to a preferred return threshold). During 2020, we made payments of deferred acquisition fees (including interest) to our advisor totaling $2.7 million and capitalized current and deferred acquisition fees of approximately $0.2 million. At December 31, 2020, unpaid installments of current and deferred acquisition fees (including interest) totaled approximately $1.9 million. Pursuant to the advisory agreement, the cumulative total acquisition costs that we incur, including acquisition fees paid to the advisor, may not exceed 6.0% of the aggregate contract purchase price of all investments, which is measured at the end of each year. As of the year ended December 31, 2020, cumulative total acquisition costs did not exceed 6.0%. Effective January 1, 2020, the advisor waived its right to disposition fees with respect to sales and dispositions of single investments and portfolios of investments. The advisor may still be entitled to disposition fees in connection with a transaction or series of transactions related to a merger, liquidation, or other event, at the discretion of our board of directors. We paid no disposition fees during 2020.
We paid an annual distribution and shareholder servicing fee in connection with our Class C shares to selected dealers equal to 1.0% of the net asset value per share (“NAV”) of our Class C shares. The distribution and shareholder servicing fee accrued daily and was payable quarterly in arrears. During 2020, we made payments for the distribution and shareholder servicing fee totaling approximately $1.9 million. We ceased incurring the distribution and shareholder servicing fee during the fourth quarter of 2020 when, in the aggregate, underwriting compensation from all sources, including the distribution and shareholder servicing fee, any organizational and offering fee paid for underwriting and underwriting compensation paid by us and our affiliates, equaled 10% of the gross proceeds from our initial public offering (pursuant to limitations on underwriting compensation set by the Financial Industry Regulatory Authority).
We own interests in property-owning entities ranging from 50% to 100%, with the remaining interests held by WPC or third parties.
Because we do not have our own employees, the advisor employs, directly and through its affiliates, officers and other personnel to provide services to us, including our Executive Officers. During 2020, we incurred approximately $2.8 million (approximately $0.1 million of which was capitalized) payable to the advisor or its affiliates to cover (i) personnel expenses, which includes both cash compensation and employee benefits, but excludes amounts paid by the advisor to the Executive Officers (which are not reimbursable by us); (ii) costs related to our advisor’s legal transactions group, which are based on a schedule of expenses relating to services performed for different types of transactions (e.g., financing, lease amendments, and dispositions, among other categories); and (iii) certain other overhead expenses (e.g., office rental expenses), which we pay based upon the percentage of the advisor’s full-time employee equivalents that are attributable to us (comprised of our advisor’s total full-time employee equivalents, weighted on a cash compensation basis, to be reviewed annually by us and the advisor). In addition, the amount of applicable personnel costs allocated to us was capped at 1% of our pro rata total revenues for 2020.
Policies and Procedures With Respect to Related Party Transactions
All of the transactions that we enter into with related persons, such as our Directors, Officers, and their immediate family members, must be, after disclosure of such affiliation, approved or ratified by a majority of our Directors