https://arstechnica.com/gadgets/2019/02/windows-7-extended-security-updates-will-double-in-price-each-year/

Windows 7's free support period ends on January 14, 2020. Microsoft is offering three years of support updates for the operating system on a paid basis with a new program called Extended Security Updates (ESU). Unlike previous after-life support options for Windows, which were offered as part of separately negotiated support contracts, the Windows 7 ESU updates will be available to any volume license customer, regardless of size or sales channel.

Pricing for this support has now leaked to Mary Jo Foley. For organizations already subscribing to Windows Enterprise, the first year of updates will cost an additional $25 per device. This doubles to $50 for the second year and $100 for the third year. Organizations can't skip a year, either; previous years must be paid for to obtain the year two and year three support. For companies sticking with Windows 7 Pro instead of subscribing to Windows Enterprise, the first year will cost $50 per device and will double each subsequent year to $100 and then $200.