* Dollar hits 3-month high vs yen, 5-month high vs franc
* U.S. tax cuts clear budget hurdle in Senate
* Euro hits 2-1/2-year high vs Swiss franc (Updates to afternoon U.S. trading, adds info on Taylor/Powell news item)
NEW YORK, Oct 20 (Reuters) - The dollar made its biggest daily gain in a month on Friday and posted a weekly increase for the fifth time in six weeks as progress on U.S. tax reforms raised prospects of a fiscal lift to the economy, bolstering investor appetite for risk.
The dollar hit a three-month high against the Japanese yen , to 113.56 yen, and a five-month high against the Swiss franc, touching 0.9858 franc. Traders seek the yen and Swiss franc in times of uncertainty and fear, and sell the currencies when they favor riskier assets.
"This is clearly a picture of somewhat of a risk-on rotation today, and its ignited some of the animal spirits as we take another step closer to the potential for tax reform coming to fruition," said Bill Northey, chief investment officer at the Private Client Group at U.S. Bank in Helena, Montana.
"Because from the standpoint of what has the potential to impact economic trajectory and capital markets trajectory, it really is tax reform."
Senate approval of a budget blueprint on Thursday for the 2018 fiscal year cleared a critical hurdle for Republicans to pursue a tax-cut package without Democratic support.
Investors also have viewed as bullish for the dollar remarks this week from Chair Janet Yellen and other officials of the Federal Reserve that suggest the central bank is moving forward with another rate hike this year.
The dollar briefly fell on news that Trump was considering nominating John Taylor and Jerome Powell to the top two posts at the Fed, one as chair and one as vice-chair, and on news Yellen had lunched at the White House with Trump adviser Gary Cohn. It quickly retraced those losses.
The dollar's strength dragged the euro down 0.6 percent to $1.1763 ahead of a European Central Bank meeting next week in which policymakers are seen cutting bond purchases but voting for an extension in stimulus.
Enhanced risk appetite also helped boost the euro to its highest against the Swiss franc since January 2015, when the Swiss National Bank scrapped its peg with the euro.
Ahead of national elections in Japan on Sunday, surveys suggest Prime Minister Shinzo Abe's ruling coalition is on track roughly to match the two-thirds "super majority" it held in parliament's lower house before the snap vote was called.
The New Zealand dollar sank to a five-month low on concerns the new Labour coalition will take a harder stance on immigration and foreign investment than the outgoing center-right government. (Reporting by Dion Rabouin; Editing by Dan Grebler and Chizu Nomiyama)