N.J. Stat. § 54:5-61
The holder of the tax title shall be entitled to fees and expenses in ascertaining the persons interested in the premises sold, but such fees and expenses shall not exceed in all the sum of twelve dollars, and the holder shall also be entitled for his expenses, to such sums as he may have actually paid for recording the certificate. In addition, and upon compliance with the provisions of R.S. 54:5-62 the holder shall also be entitled for his expenses, to such sums as he may have actually paid for necessary advertising in a newspaper under this chapter and fees for services of notices necessarily and actually served. Such fees and expenses shall be separate, apart from and in addition to those fees permitted under section 7 of P.L. 1965, c.187 (C.54:5-97.1) and R.S. 54:5-98. Upon redemption in accordance with R.S. 54:5-58, R.S. 54:5-59 and R.S. 54:5-60 the holder of the tax title shall be entitled to collect from the owner or other persons having a right of redemption pursuant to R.S. 54:5-54, additional sums in accordance with the following schedule: When the tax title certificate amount shall exceed the sum of two hundred dollars, the holder, upon redemption of the tax title shall be entitled to collect from the owner or other person having an interest in the lands an additional sum equal to two per cent of the amount so paid for the tax title certificate.
When the tax title certificate amount shall exceed the sum of $5,000, such additional sum shall be equal to 4% of such amount paid; and when the tax title certificate amount exceeds $10,000, such additional sum shall be equal to 6% of such amount paid. This section shall also apply to all existing tax title certificates held by municipalities on the effective date of P.L. 1991, c.75.
N.J.S. § 54:5-61