Tax Assesment - married couple

Hi,
I am married for the last 2 years but have never informed Revenue of this, and myself and my wife are PAYE workers assessed as single people currently.

We both were earning circa 40K up until recently and as I understood it there was no benefit in being assessed as a married couple.

I am about to start a new job which I will earn around 64-70 K depending on bonuses.

Is there any benefit now to be jointly assessed or does my wife still earn too much to gain any benefit in swapping tax credits?
We have one child in our family.

Sorry if this is a basic question but I looked at the revenue guides etc and still wasnt 100% sure.

Thanks.

Zero benefit

I have a similar situation in that my wife recently returned to work, but I had her tax credits for the last few years. Her new position only pays about 25k per year, while I would earn about €3,200 net per month. However last month she transferred her tax credit back to herself, and I noticed that my monthly pay was down almost €250 this month, she doesn't get paid until the end of this month, but I can only imagine that her taking her tax credit back, is not going to be worth €250 to her? With that in mind should I just keep her tax credit or what would people advise me to do?

@gilly2308 Your wife would have transferred her personal tax credit to you of €1650.This equates to €137.50 a month.When your pay packet settles down next month,this is what you should be down.
On the flip side ,your wife should be up what you are down,so it really makes no difference if you both earn enough to fully utilise the tax credit.

Thanks for that vandriver, much appreciated, and I'll keep any eye out next month.