Extra Mortgage Payment Calculator

Measure the interest and time saved by recurring or one-time principal payments.

Your estimate

Monthly payment with extra principal: $2,222.62
Interest difference: $105,428.67
Months saved: 79 months
Payments until payoff: 281 months
Total interest: $302,713.69

With extra paymentsOriginal loan

Starting values are illustrative, not live quotes. Extra principal is applied after the regular payment in the selected month. Fees, penalties and daily-interest payoff adjustments are excluded.

Payment schedule

Payment schedule
Month	Payment	Principal	Interest	Balance
1	$2,222.62	$489.28	$1,733.33	$319,510.72
2	$2,222.62	$491.93	$1,730.68	$319,018.78
3	$2,222.62	$494.60	$1,728.02	$318,524.18
4	$2,222.62	$497.28	$1,725.34	$318,026.90
5	$2,222.62	$499.97	$1,722.65	$317,526.93
6	$2,222.62	$502.68	$1,719.94	$317,024.25
7	$2,222.62	$505.40	$1,717.21	$316,518.85
8	$2,222.62	$508.14	$1,714.48	$316,010.71
9	$2,222.62	$510.89	$1,711.72	$315,499.81
10	$2,222.62	$513.66	$1,708.96	$314,986.15
11	$2,222.62	$516.44	$1,706.18	$314,469.71
12	$2,222.62	$519.24	$1,703.38	$313,950.47
13	$2,222.62	$522.05	$1,700.57	$313,428.42
14	$2,222.62	$524.88	$1,697.74	$312,903.54
15	$2,222.62	$527.72	$1,694.89	$312,375.82
16	$2,222.62	$530.58	$1,692.04	$311,845.23
17	$2,222.62	$533.46	$1,689.16	$311,311.78
18	$2,222.62	$536.35	$1,686.27	$310,775.43
19	$2,222.62	$539.25	$1,683.37	$310,236.18
20	$2,222.62	$542.17	$1,680.45	$309,694.01
21	$2,222.62	$545.11	$1,677.51	$309,148.90
22	$2,222.62	$548.06	$1,674.56	$308,600.84
23	$2,222.62	$551.03	$1,671.59	$308,049.81
24	$2,222.62	$554.01	$1,668.60	$307,495.80
25	$2,222.62	$557.02	$1,665.60	$306,938.78
26	$2,222.62	$560.03	$1,662.59	$306,378.75
27	$2,222.62	$563.07	$1,659.55	$305,815.68
28	$2,222.62	$566.12	$1,656.50	$305,249.56
29	$2,222.62	$569.18	$1,653.44	$304,680.38
30	$2,222.62	$572.27	$1,650.35	$304,108.12
31	$2,222.62	$575.37	$1,647.25	$303,532.75
32	$2,222.62	$578.48	$1,644.14	$302,954.27
33	$2,222.62	$581.62	$1,641.00	$302,372.65
34	$2,222.62	$584.77	$1,637.85	$301,787.89
35	$2,222.62	$587.93	$1,634.68	$301,199.96
36	$2,222.62	$591.12	$1,631.50	$300,608.84
37	$2,222.62	$594.32	$1,628.30	$300,014.52
38	$2,222.62	$597.54	$1,625.08	$299,416.98
39	$2,222.62	$600.78	$1,621.84	$298,816.20
40	$2,222.62	$604.03	$1,618.59	$298,212.17
41	$2,222.62	$607.30	$1,615.32	$297,604.87
42	$2,222.62	$610.59	$1,612.03	$296,994.28
43	$2,222.62	$613.90	$1,608.72	$296,380.38
44	$2,222.62	$617.22	$1,605.39	$295,763.16
45	$2,222.62	$620.57	$1,602.05	$295,142.59
46	$2,222.62	$623.93	$1,598.69	$294,518.66
47	$2,222.62	$627.31	$1,595.31	$293,891.35
48	$2,222.62	$630.71	$1,591.91	$293,260.65
49	$2,222.62	$634.12	$1,588.50	$292,626.52
50	$2,222.62	$637.56	$1,585.06	$291,988.97
51	$2,222.62	$641.01	$1,581.61	$291,347.96
52	$2,222.62	$644.48	$1,578.13	$290,703.47
53	$2,222.62	$647.97	$1,574.64	$290,055.50
54	$2,222.62	$651.48	$1,571.13	$289,404.02
55	$2,222.62	$655.01	$1,567.61	$288,749.00
56	$2,222.62	$658.56	$1,564.06	$288,090.44
57	$2,222.62	$662.13	$1,560.49	$287,428.31
58	$2,222.62	$665.71	$1,556.90	$286,762.60
59	$2,222.62	$669.32	$1,553.30	$286,093.28
60	$2,222.62	$672.95	$1,549.67	$285,420.33
61	$2,222.62	$676.59	$1,546.03	$284,743.74
62	$2,222.62	$680.26	$1,542.36	$284,063.49
63	$2,222.62	$683.94	$1,538.68	$283,379.55
64	$2,222.62	$687.65	$1,534.97	$282,691.90
65	$2,222.62	$691.37	$1,531.25	$282,000.53
66	$2,222.62	$695.11	$1,527.50	$281,305.42
67	$2,222.62	$698.88	$1,523.74	$280,606.54
68	$2,222.62	$702.67	$1,519.95	$279,903.87
69	$2,222.62	$706.47	$1,516.15	$279,197.40
70	$2,222.62	$710.30	$1,512.32	$278,487.10
71	$2,222.62	$714.15	$1,508.47	$277,772.96
72	$2,222.62	$718.01	$1,504.60	$277,054.94
73	$2,222.62	$721.90	$1,500.71	$276,333.04
74	$2,222.62	$725.81	$1,496.80	$275,607.22
75	$2,222.62	$729.75	$1,492.87	$274,877.48
76	$2,222.62	$733.70	$1,488.92	$274,143.78
77	$2,222.62	$737.67	$1,484.95	$273,406.11
78	$2,222.62	$741.67	$1,480.95	$272,664.44
79	$2,222.62	$745.69	$1,476.93	$271,918.76
80	$2,222.62	$749.72	$1,472.89	$271,169.03
81	$2,222.62	$753.79	$1,468.83	$270,415.25
82	$2,222.62	$757.87	$1,464.75	$269,657.38
83	$2,222.62	$761.97	$1,460.64	$268,895.40
84	$2,222.62	$766.10	$1,456.52	$268,129.30
85	$2,222.62	$770.25	$1,452.37	$267,359.05
86	$2,222.62	$774.42	$1,448.19	$266,584.63
87	$2,222.62	$778.62	$1,444.00	$265,806.01
88	$2,222.62	$782.84	$1,439.78	$265,023.18
89	$2,222.62	$787.08	$1,435.54	$264,236.10
90	$2,222.62	$791.34	$1,431.28	$263,444.76
91	$2,222.62	$795.63	$1,426.99	$262,649.14
92	$2,222.62	$799.93	$1,422.68	$261,849.20
93	$2,222.62	$804.27	$1,418.35	$261,044.94
94	$2,222.62	$808.62	$1,413.99	$260,236.31
95	$2,222.62	$813.00	$1,409.61	$259,423.31
96	$2,222.62	$817.41	$1,405.21	$258,605.90
97	$2,222.62	$821.84	$1,400.78	$257,784.06
98	$2,222.62	$826.29	$1,396.33	$256,957.78
99	$2,222.62	$830.76	$1,391.85	$256,127.01
100	$2,222.62	$835.26	$1,387.35	$255,291.75
101	$2,222.62	$839.79	$1,382.83	$254,451.96
102	$2,222.62	$844.34	$1,378.28	$253,607.63
103	$2,222.62	$848.91	$1,373.71	$252,758.72
104	$2,222.62	$853.51	$1,369.11	$251,905.21
105	$2,222.62	$858.13	$1,364.49	$251,047.08
106	$2,222.62	$862.78	$1,359.84	$250,184.30
107	$2,222.62	$867.45	$1,355.16	$249,316.84
108	$2,222.62	$872.15	$1,350.47	$248,444.69
109	$2,222.62	$876.88	$1,345.74	$247,567.82
110	$2,222.62	$881.63	$1,340.99	$246,686.19
111	$2,222.62	$886.40	$1,336.22	$245,799.79
112	$2,222.62	$891.20	$1,331.42	$244,908.59
113	$2,222.62	$896.03	$1,326.59	$244,012.56
114	$2,222.62	$900.88	$1,321.73	$243,111.68
115	$2,222.62	$905.76	$1,316.85	$242,205.91
116	$2,222.62	$910.67	$1,311.95	$241,295.25
117	$2,222.62	$915.60	$1,307.02	$240,379.64
118	$2,222.62	$920.56	$1,302.06	$239,459.08
119	$2,222.62	$925.55	$1,297.07	$238,533.53
120	$2,222.62	$930.56	$1,292.06	$237,602.97
121	$2,222.62	$935.60	$1,287.02	$236,667.37
122	$2,222.62	$940.67	$1,281.95	$235,726.70
123	$2,222.62	$945.76	$1,276.85	$234,780.94
124	$2,222.62	$950.89	$1,271.73	$233,830.05
125	$2,222.62	$956.04	$1,266.58	$232,874.01
126	$2,222.62	$961.22	$1,261.40	$231,912.80
127	$2,222.62	$966.42	$1,256.19	$230,946.37
128	$2,222.62	$971.66	$1,250.96	$229,974.71
129	$2,222.62	$976.92	$1,245.70	$228,997.79
130	$2,222.62	$982.21	$1,240.40	$228,015.58
131	$2,222.62	$987.53	$1,235.08	$227,028.05
132	$2,222.62	$992.88	$1,229.74	$226,035.16
133	$2,222.62	$998.26	$1,224.36	$225,036.90
134	$2,222.62	$1,003.67	$1,218.95	$224,033.24
135	$2,222.62	$1,009.10	$1,213.51	$223,024.13
136	$2,222.62	$1,014.57	$1,208.05	$222,009.56
137	$2,222.62	$1,020.07	$1,202.55	$220,989.49
138	$2,222.62	$1,025.59	$1,197.03	$219,963.90
139	$2,222.62	$1,031.15	$1,191.47	$218,932.76
140	$2,222.62	$1,036.73	$1,185.89	$217,896.03
141	$2,222.62	$1,042.35	$1,180.27	$216,853.68
142	$2,222.62	$1,047.99	$1,174.62	$215,805.68
143	$2,222.62	$1,053.67	$1,168.95	$214,752.01
144	$2,222.62	$1,059.38	$1,163.24	$213,692.64
145	$2,222.62	$1,065.12	$1,157.50	$212,627.52
146	$2,222.62	$1,070.89	$1,151.73	$211,556.64
147	$2,222.62	$1,076.69	$1,145.93	$210,479.95
148	$2,222.62	$1,082.52	$1,140.10	$209,397.43
149	$2,222.62	$1,088.38	$1,134.24	$208,309.05
150	$2,222.62	$1,094.28	$1,128.34	$207,214.77
151	$2,222.62	$1,100.20	$1,122.41	$206,114.57
152	$2,222.62	$1,106.16	$1,116.45	$205,008.40
153	$2,222.62	$1,112.16	$1,110.46	$203,896.25
154	$2,222.62	$1,118.18	$1,104.44	$202,778.07
155	$2,222.62	$1,124.24	$1,098.38	$201,653.83
156	$2,222.62	$1,130.33	$1,092.29	$200,523.51
157	$2,222.62	$1,136.45	$1,086.17	$199,387.06
158	$2,222.62	$1,142.60	$1,080.01	$198,244.45
159	$2,222.62	$1,148.79	$1,073.82	$197,095.66
160	$2,222.62	$1,155.02	$1,067.60	$195,940.64
161	$2,222.62	$1,161.27	$1,061.35	$194,779.37
162	$2,222.62	$1,167.56	$1,055.05	$193,611.81
163	$2,222.62	$1,173.89	$1,048.73	$192,437.92
164	$2,222.62	$1,180.25	$1,042.37	$191,257.68
165	$2,222.62	$1,186.64	$1,035.98	$190,071.04
166	$2,222.62	$1,193.07	$1,029.55	$188,877.97
167	$2,222.62	$1,199.53	$1,023.09	$187,678.44
168	$2,222.62	$1,206.03	$1,016.59	$186,472.42
169	$2,222.62	$1,212.56	$1,010.06	$185,259.86
170	$2,222.62	$1,219.13	$1,003.49	$184,040.73
171	$2,222.62	$1,225.73	$996.89	$182,815.00
172	$2,222.62	$1,232.37	$990.25	$181,582.63
173	$2,222.62	$1,239.05	$983.57	$180,343.59
174	$2,222.62	$1,245.76	$976.86	$179,097.83
175	$2,222.62	$1,252.50	$970.11	$177,845.32
176	$2,222.62	$1,259.29	$963.33	$176,586.04
177	$2,222.62	$1,266.11	$956.51	$175,319.93
178	$2,222.62	$1,272.97	$949.65	$174,046.96
179	$2,222.62	$1,279.86	$942.75	$172,767.09
180	$2,222.62	$1,286.80	$935.82	$171,480.30
181	$2,222.62	$1,293.77	$928.85	$170,186.53
182	$2,222.62	$1,300.77	$921.84	$168,885.76
183	$2,222.62	$1,307.82	$914.80	$167,577.94
184	$2,222.62	$1,314.90	$907.71	$166,263.03
185	$2,222.62	$1,322.03	$900.59	$164,941.01
186	$2,222.62	$1,329.19	$893.43	$163,611.82
187	$2,222.62	$1,336.39	$886.23	$162,275.43
188	$2,222.62	$1,343.63	$878.99	$160,931.81
189	$2,222.62	$1,350.90	$871.71	$159,580.91
190	$2,222.62	$1,358.22	$864.40	$158,222.68
191	$2,222.62	$1,365.58	$857.04	$156,857.11
192	$2,222.62	$1,372.98	$849.64	$155,484.13
193	$2,222.62	$1,380.41	$842.21	$154,103.72
194	$2,222.62	$1,387.89	$834.73	$152,715.83
195	$2,222.62	$1,395.41	$827.21	$151,320.42
196	$2,222.62	$1,402.97	$819.65	$149,917.46
197	$2,222.62	$1,410.56	$812.05	$148,506.89
198	$2,222.62	$1,418.21	$804.41	$147,088.69
199	$2,222.62	$1,425.89	$796.73	$145,662.80
200	$2,222.62	$1,433.61	$789.01	$144,229.19
201	$2,222.62	$1,441.38	$781.24	$142,787.81
202	$2,222.62	$1,449.18	$773.43	$141,338.63
203	$2,222.62	$1,457.03	$765.58	$139,881.60
204	$2,222.62	$1,464.93	$757.69	$138,416.67
205	$2,222.62	$1,472.86	$749.76	$136,943.81
206	$2,222.62	$1,480.84	$741.78	$135,462.97
207	$2,222.62	$1,488.86	$733.76	$133,974.11
208	$2,222.62	$1,496.92	$725.69	$132,477.19
209	$2,222.62	$1,505.03	$717.58	$130,972.15
210	$2,222.62	$1,513.19	$709.43	$129,458.97
211	$2,222.62	$1,521.38	$701.24	$127,937.59
212	$2,222.62	$1,529.62	$693.00	$126,407.96
213	$2,222.62	$1,537.91	$684.71	$124,870.06
214	$2,222.62	$1,546.24	$676.38	$123,323.82
215	$2,222.62	$1,554.61	$668.00	$121,769.20
216	$2,222.62	$1,563.03	$659.58	$120,206.17
217	$2,222.62	$1,571.50	$651.12	$118,634.67
218	$2,222.62	$1,580.01	$642.60	$117,054.66
219	$2,222.62	$1,588.57	$634.05	$115,466.08
220	$2,222.62	$1,597.18	$625.44	$113,868.91
221	$2,222.62	$1,605.83	$616.79	$112,263.08
222	$2,222.62	$1,614.53	$608.09	$110,648.55
223	$2,222.62	$1,623.27	$599.35	$109,025.28
224	$2,222.62	$1,632.06	$590.55	$107,393.22
225	$2,222.62	$1,640.90	$581.71	$105,752.31
226	$2,222.62	$1,649.79	$572.83	$104,102.52
227	$2,222.62	$1,658.73	$563.89	$102,443.79
228	$2,222.62	$1,667.71	$554.90	$100,776.08
229	$2,222.62	$1,676.75	$545.87	$99,099.33
230	$2,222.62	$1,685.83	$536.79	$97,413.50
231	$2,222.62	$1,694.96	$527.66	$95,718.54
232	$2,222.62	$1,704.14	$518.48	$94,014.40
233	$2,222.62	$1,713.37	$509.24	$92,301.03
234	$2,222.62	$1,722.65	$499.96	$90,578.37
235	$2,222.62	$1,731.98	$490.63	$88,846.39
236	$2,222.62	$1,741.37	$481.25	$87,105.02
237	$2,222.62	$1,750.80	$471.82	$85,354.22
238	$2,222.62	$1,760.28	$462.34	$83,593.94
239	$2,222.62	$1,769.82	$452.80	$81,824.12
240	$2,222.62	$1,779.40	$443.21	$80,044.72
241	$2,222.62	$1,789.04	$433.58	$78,255.68
242	$2,222.62	$1,798.73	$423.88	$76,456.94
243	$2,222.62	$1,808.48	$414.14	$74,648.47
244	$2,222.62	$1,818.27	$404.35	$72,830.20
245	$2,222.62	$1,828.12	$394.50	$71,002.07
246	$2,222.62	$1,838.02	$384.59	$69,164.05
247	$2,222.62	$1,847.98	$374.64	$67,316.07
248	$2,222.62	$1,857.99	$364.63	$65,458.08
249	$2,222.62	$1,868.05	$354.56	$63,590.03
250	$2,222.62	$1,878.17	$344.45	$61,711.86
251	$2,222.62	$1,888.35	$334.27	$59,823.51
252	$2,222.62	$1,898.57	$324.04	$57,924.94
253	$2,222.62	$1,908.86	$313.76	$56,016.08
254	$2,222.62	$1,919.20	$303.42	$54,096.89
255	$2,222.62	$1,929.59	$293.02	$52,167.29
256	$2,222.62	$1,940.04	$282.57	$50,227.25
257	$2,222.62	$1,950.55	$272.06	$48,276.69
258	$2,222.62	$1,961.12	$261.50	$46,315.58
259	$2,222.62	$1,971.74	$250.88	$44,343.83
260	$2,222.62	$1,982.42	$240.20	$42,361.41
261	$2,222.62	$1,993.16	$229.46	$40,368.25
262	$2,222.62	$2,003.96	$218.66	$38,364.30
263	$2,222.62	$2,014.81	$207.81	$36,349.48
264	$2,222.62	$2,025.72	$196.89	$34,323.76
265	$2,222.62	$2,036.70	$185.92	$32,287.06
266	$2,222.62	$2,047.73	$174.89	$30,239.33
267	$2,222.62	$2,058.82	$163.80	$28,180.51
268	$2,222.62	$2,069.97	$152.64	$26,110.54
269	$2,222.62	$2,081.19	$141.43	$24,029.35
270	$2,222.62	$2,092.46	$130.16	$21,936.89
271	$2,222.62	$2,103.79	$118.82	$19,833.10
272	$2,222.62	$2,115.19	$107.43	$17,717.91
273	$2,222.62	$2,126.65	$95.97	$15,591.27
274	$2,222.62	$2,138.16	$84.45	$13,453.10
275	$2,222.62	$2,149.75	$72.87	$11,303.36
276	$2,222.62	$2,161.39	$61.23	$9,141.96
277	$2,222.62	$2,173.10	$49.52	$6,968.87
278	$2,222.62	$2,184.87	$37.75	$4,784.00
279	$2,222.62	$2,196.70	$25.91	$2,587.29
280	$2,222.62	$2,208.60	$14.01	$378.69
281	$380.74	$378.69	$2.05	$0.00

Updated September 9, 2026

How to use

Replace the example inputs with your loan and property figures.
Select Calculate to update the estimate and any schedule.
Change one assumption at a time, then compare the result with the earlier scenario.

How this calculation works

The original schedule is compared with a second schedule using the same rate and required payment. Extra principal is deducted after the scheduled payment. Once the balance reaches zero, no further payments or interest are counted.

New balance = prior balance + monthly interest − payment − extra principal

Worked example

Illustrative inputs — not a quote or a local average.

Current principal balance: $320,000.00
Interest rate: 6.5 %
Years remaining: 30 years
Extra principal each month: $200.00
One-time principal payment: $0.00
Extra payment month: 1 month

Monthly payment with extra principal: $2,222.62. Interest difference: $105,428.67. Months saved: 79 months.

Reading the result

Use recurring extra principal for a sustainable monthly commitment. Use the one-time amount and month for a bonus or savings contribution. A smaller payment made sooner can outperform the same payment made later, because it reduces the balance for more future interest periods.

Before acting on the estimate

Confirm how your servicer identifies principal-only payments. An advance payment toward a future installment is not necessarily handled the same way. Keep enough cash for irregular expenses; the interest savings do not measure the value of liquidity.