Richie
Income Related ESA is dependant on your household income, your savings and assets, and any hours that your partner works. See
Asset and savings rule for ESA(IR) 24 hour work rule for ESA(IR) You need to contact the DWP office dealing with your ESA claim and request an ESA3 be sent, this will allow you to detail your finances and for the DWP to assess whether you are eligible for ESA(IR).
Gordon