Amortization Schedule Calculator

Every payment, month by month — principal vs. interest, remaining balance, and what extra payments do to your loan.

Monthly payment
$2,212
$350,000 at 6.50% over 30 years
Total interest
$446,406
Total paid
$796,406
Payoff time
30 yrs

Balance over time

Full amortization schedule

Every payment, month by month — how much goes to principal vs. interest.

MonthPaymentPrincipalInterestBalance
1$2,212.24$316.40$1,895.83$349,683.60
2$2,212.24$318.12$1,894.12$349,365.48
3$2,212.24$319.84$1,892.40$349,045.63
4$2,212.24$321.57$1,890.66$348,724.06
5$2,212.24$323.32$1,888.92$348,400.74
6$2,212.24$325.07$1,887.17$348,075.68
7$2,212.24$326.83$1,885.41$347,748.85
8$2,212.24$328.60$1,883.64$347,420.25
9$2,212.24$330.38$1,881.86$347,089.87
10$2,212.24$332.17$1,880.07$346,757.70
11$2,212.24$333.97$1,878.27$346,423.74
12$2,212.24$335.78$1,876.46$346,087.96
13$2,212.24$337.59$1,874.64$345,750.37
14$2,212.24$339.42$1,872.81$345,410.94
15$2,212.24$341.26$1,870.98$345,069.68
16$2,212.24$343.11$1,869.13$344,726.57
17$2,212.24$344.97$1,867.27$344,381.60
18$2,212.24$346.84$1,865.40$344,034.76
19$2,212.24$348.72$1,863.52$343,686.05
20$2,212.24$350.61$1,861.63$343,335.44
21$2,212.24$352.50$1,859.73$342,982.94
22$2,212.24$354.41$1,857.82$342,628.52
23$2,212.24$356.33$1,855.90$342,272.19
24$2,212.24$358.26$1,853.97$341,913.93
25$2,212.24$360.20$1,852.03$341,553.72
26$2,212.24$362.16$1,850.08$341,191.57
27$2,212.24$364.12$1,848.12$340,827.45
28$2,212.24$366.09$1,846.15$340,461.36
29$2,212.24$368.07$1,844.17$340,093.29
30$2,212.24$370.07$1,842.17$339,723.22
31$2,212.24$372.07$1,840.17$339,351.15
32$2,212.24$374.09$1,838.15$338,977.06
33$2,212.24$376.11$1,836.13$338,600.95
34$2,212.24$378.15$1,834.09$338,222.80
35$2,212.24$380.20$1,832.04$337,842.60
36$2,212.24$382.26$1,829.98$337,460.35
37$2,212.24$384.33$1,827.91$337,076.02
38$2,212.24$386.41$1,825.83$336,689.61
39$2,212.24$388.50$1,823.74$336,301.11
40$2,212.24$390.61$1,821.63$335,910.50
41$2,212.24$392.72$1,819.52$335,517.78
42$2,212.24$394.85$1,817.39$335,122.93
43$2,212.24$396.99$1,815.25$334,725.94
44$2,212.24$399.14$1,813.10$334,326.80
45$2,212.24$401.30$1,810.94$333,925.50
46$2,212.24$403.47$1,808.76$333,522.02
47$2,212.24$405.66$1,806.58$333,116.36
48$2,212.24$407.86$1,804.38$332,708.50
49$2,212.24$410.07$1,802.17$332,298.44
50$2,212.24$412.29$1,799.95$331,886.15
51$2,212.24$414.52$1,797.72$331,471.63
52$2,212.24$416.77$1,795.47$331,054.86
53$2,212.24$419.02$1,793.21$330,635.84
54$2,212.24$421.29$1,790.94$330,214.54
55$2,212.24$423.58$1,788.66$329,790.97
56$2,212.24$425.87$1,786.37$329,365.10
57$2,212.24$428.18$1,784.06$328,936.92
58$2,212.24$430.50$1,781.74$328,506.42
59$2,212.24$432.83$1,779.41$328,073.59
60$2,212.24$435.17$1,777.07$327,638.42
61$2,212.24$437.53$1,774.71$327,200.89
62$2,212.24$439.90$1,772.34$326,760.99
63$2,212.24$442.28$1,769.96$326,318.71
64$2,212.24$444.68$1,767.56$325,874.03
65$2,212.24$447.09$1,765.15$325,426.94
66$2,212.24$449.51$1,762.73$324,977.43
67$2,212.24$451.94$1,760.29$324,525.49
68$2,212.24$454.39$1,757.85$324,071.10
69$2,212.24$456.85$1,755.39$323,614.25
70$2,212.24$459.33$1,752.91$323,154.92
71$2,212.24$461.82$1,750.42$322,693.10
72$2,212.24$464.32$1,747.92$322,228.79
73$2,212.24$466.83$1,745.41$321,761.95
74$2,212.24$469.36$1,742.88$321,292.59
75$2,212.24$471.90$1,740.33$320,820.69
76$2,212.24$474.46$1,737.78$320,346.23
77$2,212.24$477.03$1,735.21$319,869.20
78$2,212.24$479.61$1,732.62$319,389.59
79$2,212.24$482.21$1,730.03$318,907.38
80$2,212.24$484.82$1,727.41$318,422.55
81$2,212.24$487.45$1,724.79$317,935.10
82$2,212.24$490.09$1,722.15$317,445.01
83$2,212.24$492.74$1,719.49$316,952.27
84$2,212.24$495.41$1,716.82$316,456.86
85$2,212.24$498.10$1,714.14$315,958.76
86$2,212.24$500.79$1,711.44$315,457.97
87$2,212.24$503.51$1,708.73$314,954.46
88$2,212.24$506.23$1,706.00$314,448.22
89$2,212.24$508.98$1,703.26$313,939.25
90$2,212.24$511.73$1,700.50$313,427.51
91$2,212.24$514.51$1,697.73$312,913.01
92$2,212.24$517.29$1,694.95$312,395.71
93$2,212.24$520.09$1,692.14$311,875.62
94$2,212.24$522.91$1,689.33$311,352.71
95$2,212.24$525.74$1,686.49$310,826.96
96$2,212.24$528.59$1,683.65$310,298.37
97$2,212.24$531.46$1,680.78$309,766.92
98$2,212.24$534.33$1,677.90$309,232.58
99$2,212.24$537.23$1,675.01$308,695.35
100$2,212.24$540.14$1,672.10$308,155.22
101$2,212.24$543.06$1,669.17$307,612.15
102$2,212.24$546.01$1,666.23$307,066.15
103$2,212.24$548.96$1,663.27$306,517.18
104$2,212.24$551.94$1,660.30$305,965.25
105$2,212.24$554.93$1,657.31$305,410.32
106$2,212.24$557.93$1,654.31$304,852.39
107$2,212.24$560.95$1,651.28$304,291.43
108$2,212.24$563.99$1,648.25$303,727.44
109$2,212.24$567.05$1,645.19$303,160.39
110$2,212.24$570.12$1,642.12$302,590.27
111$2,212.24$573.21$1,639.03$302,017.07
112$2,212.24$576.31$1,635.93$301,440.75
113$2,212.24$579.43$1,632.80$300,861.32
114$2,212.24$582.57$1,629.67$300,278.75
115$2,212.24$585.73$1,626.51$299,693.02
116$2,212.24$588.90$1,623.34$299,104.12
117$2,212.24$592.09$1,620.15$298,512.03
118$2,212.24$595.30$1,616.94$297,916.73
119$2,212.24$598.52$1,613.72$297,318.21
120$2,212.24$601.76$1,610.47$296,716.44
121$2,212.24$605.02$1,607.21$296,111.42
122$2,212.24$608.30$1,603.94$295,503.12
123$2,212.24$611.60$1,600.64$294,891.52
124$2,212.24$614.91$1,597.33$294,276.61
125$2,212.24$618.24$1,594.00$293,658.37
126$2,212.24$621.59$1,590.65$293,036.78
127$2,212.24$624.96$1,587.28$292,411.83
128$2,212.24$628.34$1,583.90$291,783.49
129$2,212.24$631.74$1,580.49$291,151.74
130$2,212.24$635.17$1,577.07$290,516.58
131$2,212.24$638.61$1,573.63$289,877.97
132$2,212.24$642.07$1,570.17$289,235.90
133$2,212.24$645.54$1,566.69$288,590.36
134$2,212.24$649.04$1,563.20$287,941.32
135$2,212.24$652.56$1,559.68$287,288.76
136$2,212.24$656.09$1,556.15$286,632.67
137$2,212.24$659.64$1,552.59$285,973.03
138$2,212.24$663.22$1,549.02$285,309.81
139$2,212.24$666.81$1,545.43$284,643.00
140$2,212.24$670.42$1,541.82$283,972.58
141$2,212.24$674.05$1,538.18$283,298.53
142$2,212.24$677.70$1,534.53$282,620.82
143$2,212.24$681.38$1,530.86$281,939.45
144$2,212.24$685.07$1,527.17$281,254.38
145$2,212.24$688.78$1,523.46$280,565.60
146$2,212.24$692.51$1,519.73$279,873.10
147$2,212.24$696.26$1,515.98$279,176.84
148$2,212.24$700.03$1,512.21$278,476.81
149$2,212.24$703.82$1,508.42$277,772.99
150$2,212.24$707.63$1,504.60$277,065.35
151$2,212.24$711.47$1,500.77$276,353.88
152$2,212.24$715.32$1,496.92$275,638.56
153$2,212.24$719.20$1,493.04$274,919.37
154$2,212.24$723.09$1,489.15$274,196.28
155$2,212.24$727.01$1,485.23$273,469.27
156$2,212.24$730.95$1,481.29$272,738.32
157$2,212.24$734.91$1,477.33$272,003.42
158$2,212.24$738.89$1,473.35$271,264.53
159$2,212.24$742.89$1,469.35$270,521.64
160$2,212.24$746.91$1,465.33$269,774.73
161$2,212.24$750.96$1,461.28$269,023.77
162$2,212.24$755.03$1,457.21$268,268.74
163$2,212.24$759.12$1,453.12$267,509.63
164$2,212.24$763.23$1,449.01$266,746.40
165$2,212.24$767.36$1,444.88$265,979.04
166$2,212.24$771.52$1,440.72$265,207.52
167$2,212.24$775.70$1,436.54$264,431.82
168$2,212.24$779.90$1,432.34$263,651.92
169$2,212.24$784.12$1,428.11$262,867.80
170$2,212.24$788.37$1,423.87$262,079.43
171$2,212.24$792.64$1,419.60$261,286.79
172$2,212.24$796.93$1,415.30$260,489.85
173$2,212.24$801.25$1,410.99$259,688.60
174$2,212.24$805.59$1,406.65$258,883.01
175$2,212.24$809.96$1,402.28$258,073.06
176$2,212.24$814.34$1,397.90$257,258.71
177$2,212.24$818.75$1,393.48$256,439.96
178$2,212.24$823.19$1,389.05$255,616.77
179$2,212.24$827.65$1,384.59$254,789.12
180$2,212.24$832.13$1,380.11$253,956.99
181$2,212.24$836.64$1,375.60$253,120.36
182$2,212.24$841.17$1,371.07$252,279.19
183$2,212.24$845.73$1,366.51$251,433.46
184$2,212.24$850.31$1,361.93$250,583.15
185$2,212.24$854.91$1,357.33$249,728.24
186$2,212.24$859.54$1,352.69$248,868.70
187$2,212.24$864.20$1,348.04$248,004.50
188$2,212.24$868.88$1,343.36$247,135.62
189$2,212.24$873.59$1,338.65$246,262.03
190$2,212.24$878.32$1,333.92$245,383.71
191$2,212.24$883.08$1,329.16$244,500.64
192$2,212.24$887.86$1,324.38$243,612.78
193$2,212.24$892.67$1,319.57$242,720.11
194$2,212.24$897.50$1,314.73$241,822.60
195$2,212.24$902.37$1,309.87$240,920.24
196$2,212.24$907.25$1,304.98$240,012.99
197$2,212.24$912.17$1,300.07$239,100.82
198$2,212.24$917.11$1,295.13$238,183.71
199$2,212.24$922.08$1,290.16$237,261.63
200$2,212.24$927.07$1,285.17$236,334.56
201$2,212.24$932.09$1,280.15$235,402.47
202$2,212.24$937.14$1,275.10$234,465.33
203$2,212.24$942.22$1,270.02$233,523.11
204$2,212.24$947.32$1,264.92$232,575.79
205$2,212.24$952.45$1,259.79$231,623.34
206$2,212.24$957.61$1,254.63$230,665.72
207$2,212.24$962.80$1,249.44$229,702.93
208$2,212.24$968.01$1,244.22$228,734.91
209$2,212.24$973.26$1,238.98$227,761.65
210$2,212.24$978.53$1,233.71$226,783.13
211$2,212.24$983.83$1,228.41$225,799.30
212$2,212.24$989.16$1,223.08$224,810.14
213$2,212.24$994.52$1,217.72$223,815.62
214$2,212.24$999.90$1,212.33$222,815.72
215$2,212.24$1,005.32$1,206.92$221,810.40
216$2,212.24$1,010.77$1,201.47$220,799.63
217$2,212.24$1,016.24$1,196.00$219,783.39
218$2,212.24$1,021.74$1,190.49$218,761.65
219$2,212.24$1,027.28$1,184.96$217,734.37
220$2,212.24$1,032.84$1,179.39$216,701.53
221$2,212.24$1,038.44$1,173.80$215,663.09
222$2,212.24$1,044.06$1,168.18$214,619.02
223$2,212.24$1,049.72$1,162.52$213,569.31
224$2,212.24$1,055.40$1,156.83$212,513.90
225$2,212.24$1,061.12$1,151.12$211,452.78
226$2,212.24$1,066.87$1,145.37$210,385.91
227$2,212.24$1,072.65$1,139.59$209,313.26
228$2,212.24$1,078.46$1,133.78$208,234.81
229$2,212.24$1,084.30$1,127.94$207,150.51
230$2,212.24$1,090.17$1,122.07$206,060.33
231$2,212.24$1,096.08$1,116.16$204,964.26
232$2,212.24$1,102.02$1,110.22$203,862.24
233$2,212.24$1,107.98$1,104.25$202,754.26
234$2,212.24$1,113.99$1,098.25$201,640.27
235$2,212.24$1,120.02$1,092.22$200,520.25
236$2,212.24$1,126.09$1,086.15$199,394.16
237$2,212.24$1,132.19$1,080.05$198,261.98
238$2,212.24$1,138.32$1,073.92$197,123.66
239$2,212.24$1,144.48$1,067.75$195,979.17
240$2,212.24$1,150.68$1,061.55$194,828.49
241$2,212.24$1,156.92$1,055.32$193,671.57
242$2,212.24$1,163.18$1,049.05$192,508.39
243$2,212.24$1,169.48$1,042.75$191,338.90
244$2,212.24$1,175.82$1,036.42$190,163.08
245$2,212.24$1,182.19$1,030.05$188,980.90
246$2,212.24$1,188.59$1,023.65$187,792.31
247$2,212.24$1,195.03$1,017.21$186,597.28
248$2,212.24$1,201.50$1,010.74$185,395.77
249$2,212.24$1,208.01$1,004.23$184,187.76
250$2,212.24$1,214.55$997.68$182,973.21
251$2,212.24$1,221.13$991.10$181,752.07
252$2,212.24$1,227.75$984.49$180,524.33
253$2,212.24$1,234.40$977.84$179,289.93
254$2,212.24$1,241.08$971.15$178,048.84
255$2,212.24$1,247.81$964.43$176,801.04
256$2,212.24$1,254.57$957.67$175,546.47
257$2,212.24$1,261.36$950.88$174,285.11
258$2,212.24$1,268.19$944.04$173,016.92
259$2,212.24$1,275.06$937.17$171,741.85
260$2,212.24$1,281.97$930.27$170,459.88
261$2,212.24$1,288.91$923.32$169,170.97
262$2,212.24$1,295.90$916.34$167,875.07
263$2,212.24$1,302.91$909.32$166,572.16
264$2,212.24$1,309.97$902.27$165,262.19
265$2,212.24$1,317.07$895.17$163,945.12
266$2,212.24$1,324.20$888.04$162,620.92
267$2,212.24$1,331.37$880.86$161,289.54
268$2,212.24$1,338.59$873.65$159,950.96
269$2,212.24$1,345.84$866.40$158,605.12
270$2,212.24$1,353.13$859.11$157,251.99
271$2,212.24$1,360.46$851.78$155,891.54
272$2,212.24$1,367.83$844.41$154,523.71
273$2,212.24$1,375.23$837.00$153,148.48
274$2,212.24$1,382.68$829.55$151,765.79
275$2,212.24$1,390.17$822.06$150,375.62
276$2,212.24$1,397.70$814.53$148,977.91
277$2,212.24$1,405.27$806.96$147,572.64
278$2,212.24$1,412.89$799.35$146,159.75
279$2,212.24$1,420.54$791.70$144,739.21
280$2,212.24$1,428.23$784.00$143,310.98
281$2,212.24$1,435.97$776.27$141,875.01
282$2,212.24$1,443.75$768.49$140,431.26
283$2,212.24$1,451.57$760.67$138,979.69
284$2,212.24$1,459.43$752.81$137,520.26
285$2,212.24$1,467.34$744.90$136,052.93
286$2,212.24$1,475.28$736.95$134,577.64
287$2,212.24$1,483.28$728.96$133,094.36
288$2,212.24$1,491.31$720.93$131,603.05
289$2,212.24$1,499.39$712.85$130,103.67
290$2,212.24$1,507.51$704.73$128,596.16
291$2,212.24$1,515.68$696.56$127,080.48
292$2,212.24$1,523.89$688.35$125,556.60
293$2,212.24$1,532.14$680.10$124,024.46
294$2,212.24$1,540.44$671.80$122,484.02
295$2,212.24$1,548.78$663.46$120,935.23
296$2,212.24$1,557.17$655.07$119,378.06
297$2,212.24$1,565.61$646.63$117,812.45
298$2,212.24$1,574.09$638.15$116,238.37
299$2,212.24$1,582.61$629.62$114,655.75
300$2,212.24$1,591.19$621.05$113,064.57
301$2,212.24$1,599.81$612.43$111,464.76
302$2,212.24$1,608.47$603.77$109,856.29
303$2,212.24$1,617.18$595.05$108,239.11
304$2,212.24$1,625.94$586.30$106,613.17
305$2,212.24$1,634.75$577.49$104,978.42
306$2,212.24$1,643.60$568.63$103,334.81
307$2,212.24$1,652.51$559.73$101,682.30
308$2,212.24$1,661.46$550.78$100,020.84
309$2,212.24$1,670.46$541.78$98,350.39
310$2,212.24$1,679.51$532.73$96,670.88
311$2,212.24$1,688.60$523.63$94,982.27
312$2,212.24$1,697.75$514.49$93,284.52
313$2,212.24$1,706.95$505.29$91,577.58
314$2,212.24$1,716.19$496.05$89,861.38
315$2,212.24$1,725.49$486.75$88,135.89
316$2,212.24$1,734.84$477.40$86,401.06
317$2,212.24$1,744.23$468.01$84,656.83
318$2,212.24$1,753.68$458.56$82,903.15
319$2,212.24$1,763.18$449.06$81,139.97
320$2,212.24$1,772.73$439.51$79,367.24
321$2,212.24$1,782.33$429.91$77,584.91
322$2,212.24$1,791.99$420.25$75,792.92
323$2,212.24$1,801.69$410.54$73,991.23
324$2,212.24$1,811.45$400.79$72,179.77
325$2,212.24$1,821.26$390.97$70,358.51
326$2,212.24$1,831.13$381.11$68,527.38
327$2,212.24$1,841.05$371.19$66,686.33
328$2,212.24$1,851.02$361.22$64,835.31
329$2,212.24$1,861.05$351.19$62,974.26
330$2,212.24$1,871.13$341.11$61,103.14
331$2,212.24$1,881.26$330.98$59,221.87
332$2,212.24$1,891.45$320.79$57,330.42
333$2,212.24$1,901.70$310.54$55,428.72
334$2,212.24$1,912.00$300.24$53,516.72
335$2,212.24$1,922.36$289.88$51,594.37
336$2,212.24$1,932.77$279.47$49,661.60
337$2,212.24$1,943.24$269.00$47,718.36
338$2,212.24$1,953.76$258.47$45,764.60
339$2,212.24$1,964.35$247.89$43,800.25
340$2,212.24$1,974.99$237.25$41,825.26
341$2,212.24$1,985.68$226.55$39,839.58
342$2,212.24$1,996.44$215.80$37,843.14
343$2,212.24$2,007.25$204.98$35,835.89
344$2,212.24$2,018.13$194.11$33,817.76
345$2,212.24$2,029.06$183.18$31,788.70
346$2,212.24$2,040.05$172.19$29,748.65
347$2,212.24$2,051.10$161.14$27,697.55
348$2,212.24$2,062.21$150.03$25,635.34
349$2,212.24$2,073.38$138.86$23,561.96
350$2,212.24$2,084.61$127.63$21,477.35
351$2,212.24$2,095.90$116.34$19,381.45
352$2,212.24$2,107.26$104.98$17,274.19
353$2,212.24$2,118.67$93.57$15,155.52
354$2,212.24$2,130.15$82.09$13,025.38
355$2,212.24$2,141.68$70.55$10,883.69
356$2,212.24$2,153.28$58.95$8,730.41
357$2,212.24$2,164.95$47.29$6,565.46
358$2,212.24$2,176.68$35.56$4,388.79
359$2,212.24$2,188.47$23.77$2,200.32
360$2,212.24$2,200.32$11.92$0.00

How the math works

Amortization is just a payment plan with a guarantee: every payment is identical, and the last one lands the balance at exactly zero. The monthly payment comes from the standard loan formula — monthly rate equals the annual rate divided by 12, and the payment is sized so that many payments of interest-plus-principal exactly retire the loan.

The split inside each payment is where it gets interesting. Every month, the lender first charges interest on the remaining balance (balance × monthly rate); whatever is left of your fixed payment then reduces the balance. Early on, the balance is huge, so the interest charge eats nearly the whole payment. As the balance shrinks, the interest slice shrinks with it and the principal slice grows — the same payment, rebalanced every month, until the final payments are almost pure principal.

Why each input matters: the loan amount sets the scale of every number downstream; the rate determines how lopsided the early split is — at higher rates you spend years barely denting the balance; the term decides the payment size and therefore how fast the balance (and the interest charged on it) falls; and extra payments skip the interest step entirely, going straight to principal and shrinking every future interest charge.

Worked example

Take a $300,000 loan at 6.75% for 30 years. The monthly rate is 6.75% ÷ 12 = 0.5625%, and 360 payments of $1,945.79 retire the loan exactly. In month 1, interest is $300,000 × 0.5625% = $1,687.50 — a full 86.7% of the payment — leaving just $258.29 for principal. Over the life of the loan you pay $400,486 in interest, more than the amount you borrowed.

Monthly payment
$1,945.79
Month 1: interest
$1,687.50 (86.7%)
Total interest, 30 yrs
$400,486

The crossover — the first month where principal exceeds interest — doesn't arrive until well past the halfway mark of the loan. That long interest-heavy phase is exactly why extra payments made early are so powerful.

What to watch for

Frequently asked questions

What is an amortization schedule?

It's the month-by-month plan of your loan: each payment is split between interest (charged on the remaining balance) and principal (which reduces the balance). Early payments are mostly interest; later payments are mostly principal.

Why do I pay so much interest in the early years?

Interest is charged on the outstanding balance, which is largest at the start. On a 30-year loan, well over half of your first years' payments can go to interest.

How do extra principal payments change the schedule?

Every extra dollar goes straight to principal, which shrinks the balance that future interest is charged on. Even $100–200/month extra can shave years off a 30-year mortgage and save tens of thousands in interest.

Can I use this for car loans or personal loans?

Yes — amortization works the same for any fixed-rate, fixed-payment loan. Enter the amount, rate, and term for a car loan, personal loan, or student loan.

What happens to the schedule if I miss a payment?

Interest keeps accruing on the balance while the payment is missed, so you fall behind the schedule — plus late fees and a credit-report hit after 30 days. One missed payment doesn't change the math of the remaining schedule, but catching up means covering the missed payment plus the extra accrued interest.

Is a 15-year loan just a faster amortization?

Essentially, yes — same math, fewer payments, so each payment carries a much bigger principal slice. On a $300,000 loan at 6.75%, the 30-year schedule charges about $400,486 in total interest; the 15-year version charges about $177,851 — less than half — in exchange for a $2,654.73 monthly payment versus $1,945.79.

How is an amortization schedule different from a payoff quote?

The schedule assumes you pay on the first of each month through the end of the term. A payoff quote is what you actually owe on a specific date: remaining balance plus interest accrued since your last payment (per-diem interest). Always get a formal payoff quote before closing out a loan.

Do extra payments lower my monthly payment?

No — your required payment stays the same; extra payments shorten the loan instead (you finish early). The exception is a recast (re-amortization): some servicers will recompute your payment over the remaining term after a large lump sum, for a small fee.