elan maui explains why you may billower electri >> reporter: there is a surprising new write side to all the changes in america's tax code. your electric bill could be going down. because this l cuts the corporate rate from 35 to 25 today generating a windfall that they are required to pass on to you. petco announced it's cutting rates f household in maryland. that translate to $3 off the monthly bill. similar moves are planned for digital wear and new jersey. the ceo told us this is a direct result of tax cuts. >> the rates that we charge our cus always mirror the costs we have. if our costs are decreased because of lower tax rates we need p tos the lower tax rates, the lower costs onto om custs. >> reporter: local regulators have to approve any changes in your utility rates. that's why you are only now t starting to s reductions ripple across the country. >> this is probably the largest corporate tax decrease we've seen in the utility industry in as long as i can remember. it's important -- agn, we thought it very important that we move proactively with oursi comms that we reach ou