Its net profit last year rose to Tw$106.70 billion ($3.50 billion), compared with Tw$94.76 billion the previous year, it said in a statement released late Friday night.
The group's overall sales hit a record high of Tw$3.95 trillion, up from Tw$3.91 trillion in 2012 and its profits in the three months to December were up 5.6 percent on the same period the previous year.
But despite the profit jump, analysts say Hon Hai's revenues are likely to slow in the first half of this year until Apple releases its new handset.
Japan's leading Nikkei business daily reported Friday that Apple is likely to launch the new iPhone globally in September, with a higher resolution and bigger screen.
The handset, expected to be called the iPhone 6, is set to come in two versions with a 4.7- or 5.5-inch screen, up from the current four-inch panel, the report said, without citing sources.
It employs around one million workers in China, roughly half of them based at its main facility in the southern city of Shenzhen.