backdoor， “There are no income or contribution limits ”

Backdoor Roth: A strategy for people whose income is too high to be eligible for regular Roth IRA contributions. You simply roll money from a traditional IRA to a Roth. There are no income or contribution limits — that is, anyone can convert any amount of money from a traditional to a Roth IRA. But you risk a hefty tax bill on the rollover if you have pretax money — either contributions you’ve deducted or investment earnings — sitting in any traditional IRAs, thanks to the IRS’ pro-rata rule.