I earn over the threshold (about the same as you) and I claim child benefit. I initially kept about half of it back in case I have to repay anything.
However if you make additional pension payments it reduces your "taxable wage" for CB purposes. So I make additional pension payments and get to keep all the CB.
www.moneysavingexpert.com/news/2013/10/child-benefit-deadline-for-higher-earners-looms/
"I earn between £50,000 and £60,000. How can I calculate the reduction?
If at least one parent in a family earns in between £50,000-£60,000, they will still get the full child benefit. However, they'll pay extra income tax to reduce the gain.
This will be charged at 1% of the total child benefit per extra £100 they earn over £50,000 a year, and will be based on the salary of the highest earner of the two. See the HMRC website for how to calculate this.
However, if you earn over £50,000 and put money into a private pension plan, or ask your employer to sacrifice a portion of your salary in exchange for childcare vouchers or additional holiday, then the amount you get in child benefit is calculated based on your headline salary after these deductions.
So if for example, your salary is £54,000, but you pay £4,000 or more into your pension each year, you will still receive full child benefit and will not have to repay any of it. High earners may choose to contribute more to their pension or to pay for extra holiday in order to receive the full amount of child benefit."