Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

	Year Ended								Nine Month Ended
IFRS	2012		2013		2014		2015		2015		2016
	(in NT$ thousand)
SPIL Consolidated Ratio of Earnings to Fixed Charge
Pre-tax income from continuing operations before adjustment for noncontrolling interest and income or loss from equity investees	$	6,800,919	$	7,534,087	$	14,439,775	$	10,561,230	$	10,431,133	$	8,244,008
Add:
Fixed charges		280,451		428,174		609,290		728,827		558,471		574,230
Amortization of capitalized interest		-		-		-		-
Distributed income of equity investees		5,250		12,259		243		-
Subtract:
Interest capitalized		-		-		-		-
Pretax income as adjusted	$	7,086,620	$	7,974,520	$	15,049,308	$	11,290,057	$	10,989,605	$	8,818,238
Fixed charges:
Interest expense and capitalized	$	196,640	$	270,108	$	354,508	$	263,868		203,267		183,762
Amortization of debt issuance costs and discounts		674		628		48,960		301,582		223,995		232,023
Estimate of the interest within rental expense (a)		83,137		157,438		205,822		163,377		131,209		158,445
Total fixed charges	$	280,451	$	428,174	$	609,290	$	728,827	$	558,471	$	574,230
Ratio of earnings to fixed charges		25.27		18.62		24.70		15.49		19.68		15.36

(a) The estimate of the interest within rental expense was calculated by using one-third of the rental expense, which Company believes is a reasonable approximation of the interest component of rental expense.