$680
In addition to the processing fee, all 5(1) applications must include the $100 right of citizenship fee. There is no processing fee for applications for a 5(5) grant; however, the $100 right of citizenship fee must be included for all applicants aged 18 and over.  If you believe that you are capable of becoming a US citizen, you will have to file the USCIS Form N-400, along with certain supporting documents and the filing fee. The form filing fee is $595 and along with that you will have to pay $85, for biometrics. Hence the total fee $680, must accompany your naturalization application. You will have to go through the form instructions to know about the payment details. Military applicants need not pay the filing fee. Similarly, if you are above age 75, you may not be required to pay the biometric Eligible residents must fill out U.S. Citizenship and Immigration forms that require a total of $680 in fees. For many qualified immigrants, the dream of U.S. citizenship is priceless — but the reality unaffordable, say some advocates. Citizenship application fees have spiked to $595 in the past 15 years, up a staggering $500 since 1997. But that’s not the bottom line for would-be Americans: With fingerprint costs, the current total is a whopping $680. A study found this as a 'major barrier.'. For many qualified immigrants, the dream of U.S. citizenship is priceless — but the reality unaffordable, say some advocates. Citizenship application fees have spiked to $595 in the past 15 years, up a staggering $500 since 1997. The filing fee as of 2010 for submission of the Form N-400 is $680.00. This fee includes the cost for the application ($595.00) and a biometric fee of $85.00. The $680.00 is the standard filing fee. However, you may qualify for exceptions. You are not required to pay the filing fee if you are submitting a request for naturalization because of your service in the military. by FreeAdvice staff. The filing fee as of 2010 for submission of the Form N-400 is $680.00. This fee includes the cost for the application ($595.00) and a biometric fee of $85.00. The biometric fee covers the expense of being fingerprinted and photographed after your application is submitted. The $680.00 is the standard filing fee. However, you may qualify for exceptions. You are not required to pay the filing fee if you are submitting a request for naturalization because of your service in the military. $680 is the last fee in a long line of fees. It's after you have a permanent green card-just before you get citizenship-that final hurdle is $680. If you want to talk about the whole process-that depends upon the process and the person, I've seen people spend up to $10,000. We’re in the business of breaking even.”. The USCIS is supposed to do a fee study every two years and propose fee levels proportional to the costs they’re incurring; those fees then get set through federal rulemaking. In 1997, the fee for a naturalization application was $95, less than 15% of what it is today. The most recent jump came in 2007, when the USCIS proposed increasing the naturalization application fee about 85%, from $320 to the current rate U.S. Citizenship Filing Fee Exceptions. The $680.00 is the standard filing fee. However, you may qualify for exceptions. You are not required to pay the filing fee if you are submitting a request for naturalization because of your service in the military. If you are over 75 years of age, you are not required to submit the extra $85.00 for the biometric fee Citizenship Fees. The fees associated with citizenship applications are prescribed in the Irish Nationality and Citizenship Regulations 2011, which came into effect on 10th November, 2011. APPLICATION FEE. An application fee of €175 is required for every application for a certificate of naturalisation. 
http://www.cic.gc.ca/english/resources/tools/fees/cit/citizenship.asp https://www.uscitizenship.info/articles/what-is-the-filing-fee-for-form-n-400-and-why-you-need-to-pay-for-us-citizenship/index.html http://www.nydailynews.com/new-york/citizenship-now/citizenship-fees-major-barrier-680-article-1.1312275 http://immigration-law.freeadvice.com/immigration-law/citizenship/form_n400_fee.htm http://immigration-law.freeadvice.com/immigration-law/citizenship/form_n400_fee.htm http://swampland.time.com/2013/07/09/explainer-why-it-costs-immigrants-680-to-apply-for-naturalization/ http://immigration-law.freeadvice.com/immigration-law/citizenship/form_n400_fee.htm http://www.inis.gov.ie/en/INIS/Pages/WP11000026
how much is naturalization fee