CSG SYSTEMS INTERNATIONAL INC Debt Disclosure

6. Debt

2025 Credit Agreement. In March 2025, we entered into a $600.0 million five-year debt arrangement (the "2025 Credit Agreement") with a consortium of banks. The 2025 Credit Agreement consists of a $600.0 million aggregate principal five-year revolving loan facility (the "2025 Revolver") due March 2030 (subject to a springing maturity of 91 days prior to the maturity date of certain of our long-term indebtedness if, on such date, the aggregate principal amount of such indebtedness equals or exceeds $127.0 million and 50% of consolidated EBITDA (subject to certain exceptions as defined in the 2025 Credit Agreement)). The 2025 Credit Agreement replaced our $600.0 million five-year credit agreement entered into in September 2021 (the “2021 Credit Agreement”), which consisted of: (i) $150.0 million aggregate principal five-year term loan (the "2021 Term Loan"); and (ii) $450.0 million revolving loan facility (the "2021 Revolver").

Upon execution of the 2025 Credit Agreement, we withdrew $140.6 million from the 2025 Revolver. These funds were used to repay: (i) the outstanding $125.6 million balance of 2021 Term Loan; (ii) the outstanding $10.0 million balance of 2021 Revolver that we withdrew during the first quarter of 2025; and (iii) certain fees and expenses in connection with the new debt arrangement, with the remainder used for general corporate purposes.

The interest rates under the 2025 Credit Agreement are based upon our choice of an adjusted Secured Overnight Financing Rate ("SOFR") plus an applicable margin of 1.375% - 2.125%, or an alternate base rate ("ABR") plus an applicable margin of 0.375% - 1.125%, with the applicable margin dependent upon our then-net secured total leverage ratio. We pay a commitment fee of 0.150% - 0.325% of the average daily unused amount of the 2025 Revolver, with the commitment fee rate also dependent upon our then-net secured total leverage ratio.

The 2025 Credit Agreement requires quarterly commitment fee payments and interest payments based on the interest election period. The 2025 Credit Agreement contains certain customary prepayment or repayment provisions. As specified in the 2025 Credit Agreement, if certain customary events were to occur, we may be required to pay all amounts outstanding under the 2025 Credit Agreement, together with interest payable thereon.

The 2025 Credit Agreement contains customary affirmative covenants. In addition, the 2025 Credit Agreement has customary negative covenants that places limits on our ability to: (i) incur additional indebtedness; (ii) create liens on its property; (iii) make investments; (iv) enter into mergers and consolidations; (v) sell assets; (vi) declare dividends or repurchase shares; (vii) engage in certain transactions with affiliates; (viii) prepay certain indebtedness; and (ix) issue capital stock of subsidiaries. We must also meet a total net leverage ratio financial covenant.

During 2025, we repaid $0.6 million on the 2025 Revolver. As of December 31, 2025, we had $125.0 million outstanding on the 2025 Revolver, and had issued a standby letter of credit of $0.2 million that counts against our available 2025 Revolver balance, leaving $474.8 million available to us.

In conjunction with the closing of the 2025 Credit Agreement, we incurred total debt financing costs of $2.3 million. As certain lenders from the 2021 Credit Agreement chose not to participate in the 2025 Credit Agreement, we recognized a loss on extinguishment of $0.5 million, which related to the write-off of unamortized debt issuance costs. The remaining $0.9 million of unamortized debt issuance costs related to the 2021 Credit Agreement, when combined with the $2.3 million of debt financing costs related to 2025 Credit Agreement, totaled $3.2 million and are being amortized to interest expense over the term of the 2025 Credit Agreement.

If the Merger, discussed in Note 2, is consummated, this will result in the outstanding loans under the 2025 Credit Agreement being repaid and commitments thereunder being terminated at the closing.

2023 Convertible Notes. In September 2023, we completed an offering of $425.0 million of 3.875% senior convertible notes due September 15, 2028 (the “2023 Convertible Notes”) to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended. The 2023 Convertible Notes are unsecured obligations and pay 3.875% annual cash interest, payable semiannually in arrears on March 15 and September 15 of each year.

The 2023 Convertible Notes will be convertible at the option of the noteholders before June 15, 2028, upon the occurrence of certain events. On or after June 15, 2028, and until the close of business on the second scheduled trading day immediately preceding September 15, 2028, the maturity date, noteholders may convert all or any portion of their notes at any time regardless of these conditions. The 2023 Convertible Notes will be convertible at a conversion rate of 14.0753 shares of our common stock per $1,000 principal amount of the 2023 Convertible Notes, which is equivalent to a conversion price of $71.05 per share of our common stock and the conversion rate and conversion price will be subject to adjustment upon the occurrence of certain events, in accordance with the terms of the Indenture related to the 2023 Convertible Notes (“2023 Notes Indenture”). Under the terms of the 2023 Convertible Notes, the conversion rate is adjusted for any quarterly dividends exceeding $0.28 per share. We are required to satisfy our conversion obligation as follows: (i) paying cash up to the aggregate principal amount of notes to be converted; and (ii) to the extent the value of our conversion obligation exceeds the par value, we will satisfy the remaining conversion obligation in our common stock, cash, or a combination thereof, at our election. As of December 31, 2025, none of the conditions to early convert have been met.

We may not redeem the 2023 Convertible Notes prior to September 21, 2026. On or after September 21, 2026, we may redeem for cash all or part of the 2023 Convertible Notes, subject to a partial redemption limitation that requires at least $100.0 million of the principal amount of the 2023 Convertible Notes to remain outstanding if the last reported sales price of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption. The redemption price will equal the principal amount of the 2023 Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund has been established for the 2023 Convertible Notes.

The 2023 Notes Indenture includes customary terms, including certain events of default after which the 2023 Convertible Notes may be due and payable immediately. The 2023 Notes Indenture contains customary affirmative covenants, including a reporting covenant.

If the Merger, discussed in Note 2, is consummated, this would result in a conversion trigger for the note holders.

In September 2023, in connection with the pricing of the 2023 Convertible Notes, we entered into privately negotiated Capped Call Transactions with certain of the initial purchasers of the 2023 Convertible Notes and other financial institutions (collectively, the “Option Counterparties”). We used $34.3 million of the net proceeds from the offering of the 2023 Convertible Notes to pay the premiums of the Capped Call Transactions.

The Capped Call Transactions cover, subject to anti-dilution adjustments substantially similar to those applicable to the 2023 Convertible Notes, 5.98 million shares of our common stock, the same number of shares of common stock underlying the 2023 Convertible Notes. The Capped Call Transactions will expire upon the maturity of the 2023 Convertible Notes.

The Capped Call Transactions are expected generally to reduce the potential dilution to our common stock upon conversion of the 2023 Convertible Notes and/or offset any cash payments we are required to make in excess of the principal amount of the 2023 Convertible Notes, in the event that the market price per share of common stock (as measured under the terms of the Capped Call Transactions) is greater than the strike price of the Capped Call Transactions. The strike price of the Capped Call Transactions initially corresponds to the initial conversion price of the 2023 Convertible Notes, or $71.05 per share of our common stock, plus any carryforward adjustments not yet effected. The Capped Call Transactions have an initial cap price of $96.52 per share of our common stock, which represents a premium of 80% over the last reported sale price of our common stock on the date the 2023 Convertible Notes were issued, subject to certain adjustments under the terms of the Capped Call Transactions.

The Capped Call Transactions are separate transactions entered into by us with the Option Counterparties. They are not part of the terms of the 2023 Convertible Notes and do not change the holders’ rights under the 2023 Convertible Notes. The Capped Call Transactions do not meet the criteria for separate accounting as a derivative as they meet the criteria for equity classification. The premiums paid for the Capped Call Transactions of $34.3 million have been included as a reduction to additional paid-in capital, net of $7.9 million of deferred income taxes.

The proceeds from the sale of the 2023 Convertible Notes, net of financing costs, were $411.0 million. We used the net proceeds to: (i) repay the principal amount of $275.0 million of outstanding borrowings under our $450.0 million, five-year revolving loan facility; (ii) repurchase 1.7 million shares of our common stock for $90.1 million in privately negotiated transactions, concurrently with the pricing of the offering of the 2023 Convertible Notes; and (iii) pay the $34.3 million premium for the Capped Call Transactions. The remaining net proceeds were used for general corporate purposes.

In conjunction with the closing of the 2023 Convertible Notes, we incurred financing costs of $14.0 million which are being amortized to interest expense using the effective interest method through maturity.

Estimated Maturities on Long-Term Debt. As of December 31, 2025, the maturities of our long-term debt, based upon: (i) the maturity date of the 2025 Revolver; and (ii) the maturity date of the 2023 Convertible Notes, were as follows (in thousands):

Deferred Financing Costs. As of December 31, 2025, net deferred financing costs related to the 2025 Credit Agreement were $2.7 million and are being amortized to interest expense over the related term of the 2025 Credit Agreement (through March 2030). As of December 31, 2025, net deferred financing costs related to the 2023 Convertible Notes were $7.9 million and are being amortized to interest expense through the maturity date of the 2023 Convertible Notes (September 2028). The net deferred financing costs are presented as a reduction from the carrying amount of the corresponding debt liability in our Balance Sheets. Interest expense for 2025, 2024, and 2023 includes amortization of deferred financing costs of $3.5 million, $3.7 million, and $1.7 million, respectively. The weighted-average interest rate on our debt borrowings, amortization of deferred financing costs, and commitment fees on the revolving loan facility, for 2025, 2024, and 2023, was approximately 5%, 5%, and 7%, respectively.

Other. We finance certain of our internal use software. During 2025, we entered into financing agreements at a total cost of $8.6 million with payments through 2030. As of December 31, 2025 and December 31, 2024, we had $11.4 million and $8.5 million, respectively, outstanding under these agreements, of which $7.1 million and $4.2 million, respectively, were included in other current liabilities with the remaining included in other non-current liabilities in our Balance Sheets. These arrangements are treated as non-cash investing and financing activities for purposes of our Statements of Cash Flows.