contributed 9.3% of each employee’s compensation up to the social security wage base, plus an additional 5.7% of the employee’s compensation in excess of the social security wage base on a discretionary basis up to regulatory maximums. HarborOne Mortgage made 0 contributions in 2019 and 2018. Contributions expensed were $1.8 million, $2.5 million and $2.3 million for the years ended December 31, 2020, 2019 and 2018, respectively.
Management Incentive Program
The Company from time to time creates incentive compensation plans for senior management and other officers to participate in at varying levels. In addition, the Company may also pay a discretionary bonus to senior management, officers, and/or nonofficers of the Company. These programs are administered by the Compensation Committee of the Board of Directors. The expense for the incentive plans amounted to $4.7 million, $2.1 million and $3.3 million for the years ended December 31, 2020, 2019 and 2018, respectively.
Supplemental Retirement Plans
The Company provides supplemental retirement benefits to 2 senior executive officers of the Company under the terms of 2 Supplemental Executive Retirement Plan Agreements (the “SERPs”). Benefits to be paid under the SERPs are based primarily on the officer’s compensation and estimated mortality. At December 31, 2020, 2019 and 2018, included in Other liabilities and accrued expenses is the Company’s obligation under the SERPs of $8.0 million, $7.1 million and $5.3 million, respectively. The retirement benefits, as defined in the SERPs, are accrued by charges to compensation expense over the required service periods of the officers. Expense related to these benefits was $955,000, $1.8 million and $658,000 for the years ended December 31, 2020, 2019 and 2018, respectively.
The Company assumed a supplemental retirement plan in the Coastway acquisition. At December 31, 2018, the Company’s obligation under the plan of $3.4 million is included in other liabilities and accrued expenses. Compensation expense related to this benefit was $90,000 for the year ended December 31, 2018. The plan was frozen as part of the merger agreement and the settlement of the plan was completed in 2019.
Split-Dollar Life Insurance Arrangement
The Company has an endorsement split-dollar life insurance agreement with an executive officer whereby the Company will pay to the executives’ estates or beneficiaries a portion of the death benefit that the Company will receive as beneficiary of such policy. Expense associated with this post-retirement benefit for the years ended December 31, 2020, 2019 and 2018 amounted to $21,000, $38,000 and $73,000, respectively. The cash surrender value of the policy is included in Bank-owned life insurance on the Consolidated Balance Sheets.
Deferred Compensation Plans
The Company is the sole owner of an annuity policy pertaining to 1 of the Company’s executives. The Company has an agreement with this executive whereby upon retirement the Company will pay to the executive an amount equal to the cash surrender value of the annuity less premiums paid accumulated at an interest rate of 1.5% per year. At December 31, 2020, 2019 and 2018, included in other liabilities and accrued expenses is the Company’s obligation under the plan of $385,000, $353,000 and $322,000, respectively. For the years ended December 31, 2020, 2019 and 2018, the expense amounted to $32,000, $31,000 and $29,000, respectively.
The Company has agreements with 2 executive officers whereby the Company will pay the cost of the premium for individual supplemental medical and prescription drug coverage for their lifetime upon retirement at age 65 or later. Spousal coverage is provided each year the executive is eligible for coverage and the spouse is age 65 or over. At December 31, 2020, 2019 and 2018, included in other liabilities and accrued expenses is the Company’s obligation under the plan of $344,000, $297,000 and $229,000, respectively. For the years ended December 31, 2020, 2019 and 2018, the expense amounted to $47,000, $66,000 and $3,000, respectively.
The Company assumed a deferred compensation plan in the Coastway acquisition. At December 31, 2018, other assets included $1.5 million in plan assets and other liabilities and accrued expenses included a liability for the benefit obligation of $1.5 million. Compensation expense related to this plan for the year ended December 31, 2018 was $46,000. The plan was terminated and paid to the former Coastway executive in 2019.