The company extended the use of all 2020 season passes through the end of 2021 and offered members the option to pause payments on their current membership through spring 2021. The company is also offering higher-tiered benefits to members that elect to maintain their current payment schedule. As anticipated, the company sold significantly fewer season passes and memberships while many of its parks remained closed, compared to the same period in 2019. As a result, the Active Pass Base, which includes all members and season pass holders, decreased 51% as of the end of fourth quarter 2020 compared to fourth quarter 2019. The Active Pass Base included 1.7 million members as of the end of 2020, compared to 2.6 million members as of the end of 2019. It also included 2.1 million traditional season pass holders compared to 5.1 million season pass holders at the end of 2019. The Active Pass Base as of December 31, 2020, was approximately flat compared to the active base as of September 30, 2020, and approximately 19% of members had elected to pause their memberships as of December 31, 2020.
Deferred revenue was $205 million as of December 31, 2020, an increase of $61 million, or 42%, from December 31, 2019. The increase in deferred revenue was primarily due to the deferral of revenue from members and season pass holders whose benefits were extended through 2021, partially offset by lower season pass and membership sales.
Balance Sheet and Liquidity
As of December 31, 2020, the company had cash on hand of $158 million and $460 million available under its revolving credit facility, net of $21 million of letters of credit, or total liquidity of $618 million. This compares to $673 million of liquidity as of September 30, 2020. The company’s net cash outflow was $56 million for fourth quarter 2020, or an average of $19 million per month, which was an improvement from the company’s prior guidance range of $25 to $30 million per month. The company’s cash flow benefitted from the sale of excess land in the fourth quarter 2020 for $8 million. For full year 2020, net cash outflow, excluding the net impact of financing raised, dividends paid, and pre-payment of debt, was $331 million, or an average of $28 million per month.
The company estimates that its net cash outflow in the first quarter of 2021 will be, on average, $53 to $58 million per month.3 The expected cash outflow is due in part to normal seasonality, as most of the company’s parks are closed during the first quarter and typically incur expenditures to ramp up for the spring season. In addition, in the first quarter of 2021, the company expects to incur incremental cash interest expense and to experience temporary pandemic-related limitations on park operations. The company is striving to become cash flow positive for the last nine months of 2021; however, this will be dependent upon all of the company’s parks opening and attendance levels continuing to normalize. The company is able to take additional measures or further modify park operations and park schedules to reduce cash outflows, if needed. At this time, the company believes it has sufficient liquidity to meet its cash obligations through the end of 2021 even if all its parks are unable to open. The company has no debt maturities until 2024.
For full year 2020, the company invested $98 million in new capital projects, net of property insurance recoveries, paid $22 million in dividends, and prepaid $51 million of its 4.875% notes due 2024. Net debt as of December 31, 2020, calculated as total reported debt of $2,623 million less cash and cash equivalents of $158 million, was $2,465 million.
On August 26, 2020, the company further amended its credit facility to, among other benefits, suspend testing of its senior secured leverage ratio financial maintenance covenant through December 31, 2021. The company’s lenders also approved modified testing of its senior secured leverage ratio financial maintenance covenant through December 31, 2022. Through the duration of the amendment period ending December 31, 2022, the company agreed to suspend paying dividends and repurchasing its common stock, and to maintain minimum liquidity of $150 million.
Transformation Plan Update
The company commenced a major transformation plan in March 2020 to reinvigorate long-term profit growth, which includes revenue and cost initiatives. The company is focused on improving and modernizing the guest experience through technology, continuously improving operational efficiency, and driving financial excellence.