First time backdoor Roth

[Goldy]

 I'm being relocated this year and the gross up is going to push me beyond the income limits for contributing to a Roth but I still want to contribute.  Do I need to keep back door contributions separate from normal contributions?  I'm wondering if I need to open a new account to make this work or if I can lump them together.

[Ursus Major]

I'm not sure what you mean by "normal" contributions, but if you are referring to contributions to a regular IRA account, there is no need to keep them separate. However any pre-tax money in a regular IRA at the end of a year means that the backdoor Roth is partially taxable, because some money for the conversion is deemed to be pre-tax money. And that doesn't change, whether you have one IRA account or multiple ones.

[MDM]

See https://www.bogleheads.org/wiki/Backdoor_Roth_IRA - that may answer all your questions, even those you didn't know to ask. ;)