per annum on the outstanding amount of each such letter of credit and (iii) commitment fees of 0.50% per annum on the daily unused amount of the revolving credit facility, in each case quarterly in arrears.
The Credit Agreement contains various covenants, including, but not limited to, limitations on the incurrence of indebtedness, permitted investments, liens on assets, making distributions, transactions with affiliates, mergers, consolidations, dispositions of assets and other provisions customary in similar types of agreements. The Credit Agreement requires compliance with (a) a debt service coverage ratio of no less than 1.1 to 1.0 and (b) if the aggregate outstanding amount of all revolving loans and drawn letters of credit exceeds an amount equal to 35% of the aggregate revolving commitments, a consolidated senior secured net leverage ratio of no greater than 6.75 to 1.00. We were in compliance with all financial covenants as of and during the three and six months ended June 30, 2024 and the year ended December 31, 2023.
For the six months ended June 30, 2024 and 2023, the weighted average interest rate on borrowings was approximately 7.5% and 7.3%, respectively. At both June 30, 2024 and December 31, 2023, our outstanding letters of credit were approximately $0.4 million.
Senior notes. On February 12, 2018, the Company and TLP Finance Corp., our wholly owned subsidiary, issued at par $300 million of 6.125% senior notes. Net proceeds, after $8.1 million of issuance costs, were used to repay indebtedness under our revolving credit facility. The senior notes are due in 2026 and are guaranteed on a senior unsecured basis by each of our 100% owned domestic subsidiaries that guarantee obligations under our revolving credit facility. TransMontaigne Partners LLC has no independent assets or operations unrelated to its investments in its consolidated subsidiaries. TLP Finance Corp. has no assets or operations. Our operations are conducted by subsidiaries of TransMontaigne Partners LLC through our 100% owned operating company subsidiary, TransMontaigne Operating Company L.P. None of the assets of TransMontaigne Partners LLC or a guarantor represent restricted net assets pursuant to the guidelines established by the SEC.
(11) DEFERRED COMPENSATION EXPENSE
We have a savings and retention plan to compensate certain employees who provide services to the Company. The purpose of the savings and retention plan is to provide for the reward and retention of participants by providing them with awards that vest over future service periods. Awards under the plan with respect to individuals providing services to the Company generally become vested as to 50% of a participant’s annual award as of the first day of the month that falls closest to the second anniversary of the grant date, and the remaining 50% as of the first day of the month that falls closest to the third anniversary of the grant date, subject to earlier vesting upon a participant’s attainment of the age and length of service thresholds, retirement, death or disability, involuntary termination without cause, or termination of a participant’s employment following a change in control of the Company as specified in the plan. The awards are increased for the value of any accrued growth based on underlying investments deemed made with respect to the awards. The awards (including any accrued growth relating thereto) are subject to forfeiture until the vesting date. A person will satisfy the age and length of service thresholds of the plan upon the attainment of the earliest of (a) age sixty, (b) age fifty-five and ten years of service as an officer of the Company or any of its affiliates or predecessors, or (c) age fifty and twenty years of service as an employee of the Company or any of its affiliates or predecessors.
We have the intent and ability to settle the savings and retention plan awards in cash, and accordingly, we account for the awards as accrued liabilities. For savings and retention plan awards to employees, approximately $0.2 million and $0.4 million is included in deferred compensation expense for the three months ended June 30, 2024 and 2023, respectively. For savings and retention plan awards to employees, approximately $1.1 million and $1.6 million is included in deferred compensation expense for the six months ended June 30, 2024 and 2023, respectively.
On September 14, 2023, an indirect parent of the Company granted class B units in the indirect parent of the Company to the officers of TMC. On September 14, 2023, an indirect parent of the Company modified existing class B units in the indirect parent of the Company to the officers of TMC. For both of the three months ended June 30, 2024 and