Lump Sum Payment Impact
Calculator

Interest saved

$18,482.85

Results

Interest saved: $18,482.85
Months saved: 23 mo
Total interest: $98,684.47
Monthly payment: $1,238.20

Balance and interest over time

Remaining balance
Interest paid to date

Payment schedule


1	1,238.20	459.03	779.17	169,540.97
2	1,238.20	461.13	777.06	169,079.84
3	1,238.20	463.25	774.95	168,616.59
4	1,238.20	465.37	772.83	168,151.22
5	1,238.20	467.50	770.69	167,683.71
6	1,238.20	469.65	768.55	167,214.07
7	1,238.20	471.80	766.40	166,742.27
8	1,238.20	473.96	764.24	166,268.30
9	1,238.20	476.13	762.06	165,792.17
10	1,238.20	478.32	759.88	165,313.85
11	1,238.20	480.51	757.69	164,833.34
12	1,238.20	482.71	755.49	164,350.63
13	1,238.20	484.92	753.27	163,865.71
14	1,238.20	487.15	751.05	163,378.56
15	1,238.20	489.38	748.82	162,889.19
16	1,238.20	491.62	746.58	162,397.56
17	1,238.20	493.87	744.32	161,903.69
18	1,238.20	496.14	742.06	161,407.55
19	1,238.20	498.41	739.78	160,909.14
20	1,238.20	500.70	737.50	160,408.44
21	1,238.20	502.99	735.21	159,905.45
22	1,238.20	505.30	732.90	159,400.15
23	1,238.20	507.61	730.58	158,892.54
24	1,238.20	509.94	728.26	158,382.60
25	1,238.20	512.28	725.92	157,870.32
26	1,238.20	514.62	723.57	157,355.70
27	1,238.20	516.98	721.21	156,838.71
28	1,238.20	519.35	718.84	156,319.36
29	1,238.20	521.73	716.46	155,797.63
30	1,238.20	524.12	714.07	155,273.50
31	1,238.20	526.53	711.67	154,746.98
32	1,238.20	528.94	709.26	154,218.04
33	1,238.20	531.36	706.83	153,686.67
34	1,238.20	533.80	704.40	153,152.87
35	1,238.20	536.25	701.95	152,616.62
36	1,238.20	538.70	699.49	152,077.92
37	1,238.20	541.17	697.02	151,536.75
38	1,238.20	543.65	694.54	150,993.09
39	1,238.20	546.15	692.05	150,446.95
40	1,238.20	548.65	689.55	149,898.30
41	1,238.20	551.16	687.03	149,347.14
42	1,238.20	553.69	684.51	148,793.45
43	1,238.20	556.23	681.97	148,237.22
44	1,238.20	558.78	679.42	147,678.44
45	1,238.20	561.34	676.86	147,117.11
46	1,238.20	563.91	674.29	146,553.19
47	1,238.20	566.50	671.70	145,986.70
48	1,238.20	569.09	669.11	145,417.61
49	1,238.20	571.70	666.50	144,845.91
50	1,238.20	574.32	663.88	144,271.59
51	1,238.20	576.95	661.24	143,694.64
52	1,238.20	579.60	658.60	143,115.04
53	1,238.20	582.25	655.94	142,532.79
54	1,238.20	584.92	653.28	141,947.86
55	1,238.20	587.60	650.59	141,360.26
56	1,238.20	590.30	647.90	140,769.97
57	1,238.20	593.00	645.20	140,176.96
58	1,238.20	595.72	642.48	139,581.24
59	1,238.20	598.45	639.75	138,982.79
60	1,238.20	601.19	637.00	138,381.60
61	1,238.20	603.95	634.25	137,777.65
62	1,238.20	606.72	631.48	137,170.94
63	1,238.20	609.50	628.70	136,561.44
64	1,238.20	612.29	625.91	135,949.15
65	1,238.20	615.10	623.10	135,334.05
66	1,238.20	617.92	620.28	134,716.14
67	1,238.20	620.75	617.45	134,095.39
68	1,238.20	623.59	614.60	133,471.80
69	1,238.20	626.45	611.75	132,845.34
70	1,238.20	629.32	608.87	132,216.02
71	1,238.20	632.21	605.99	131,583.81
72	1,238.20	635.10	603.09	130,948.71
73	1,238.20	638.02	600.18	130,310.69
74	1,238.20	640.94	597.26	129,669.75
75	1,238.20	643.88	594.32	129,025.88
76	1,238.20	646.83	591.37	128,379.05
77	1,238.20	649.79	588.40	127,729.26
78	1,238.20	652.77	585.43	127,076.48
79	1,238.20	655.76	582.43	126,420.72
80	1,238.20	658.77	579.43	125,761.95
81	1,238.20	661.79	576.41	125,100.16
82	1,238.20	664.82	573.38	124,435.34
83	1,238.20	667.87	570.33	123,767.47
84	1,238.20	670.93	567.27	123,096.54
85	1,238.20	674.00	564.19	122,422.54
86	1,238.20	677.09	561.10	121,745.45
87	1,238.20	680.20	558.00	121,065.25
88	1,238.20	683.31	554.88	120,381.93
89	1,238.20	686.45	551.75	119,695.49
90	1,238.20	689.59	548.60	119,005.89
91	1,238.20	692.75	545.44	118,313.14
92	1,238.20	695.93	542.27	117,617.21
93	1,238.20	699.12	539.08	116,918.09
94	1,238.20	702.32	535.87	116,215.77
95	1,238.20	705.54	532.66	115,510.23
96	1,238.20	708.78	529.42	114,801.45
97	1,238.20	712.02	526.17	114,089.43
98	1,238.20	715.29	522.91	113,374.14
99	1,238.20	718.57	519.63	112,655.58
100	1,238.20	721.86	516.34	111,933.72
101	1,238.20	725.17	513.03	111,208.55
102	1,238.20	728.49	509.71	110,480.06
103	1,238.20	731.83	506.37	109,748.23
104	1,238.20	735.18	503.01	109,013.05
105	1,238.20	738.55	499.64	108,274.49
106	1,238.20	741.94	496.26	107,532.55
107	1,238.20	745.34	492.86	106,787.21
108	1,238.20	748.76	489.44	106,038.46
109	1,238.20	752.19	486.01	105,286.27
110	1,238.20	755.64	482.56	104,530.63
111	1,238.20	759.10	479.10	103,771.54
112	1,238.20	762.58	475.62	103,008.96
113	1,238.20	766.07	472.12	102,242.89
114	1,238.20	769.58	468.61	101,473.30
115	1,238.20	773.11	465.09	100,700.19
116	1,238.20	776.65	461.54	99,923.54
117	1,238.20	780.21	457.98	99,143.32
118	1,238.20	783.79	454.41	98,359.53
119	1,238.20	787.38	450.81	97,572.15
120	1,238.20	790.99	447.21	96,781.16
121	1,238.20	794.62	443.58	95,986.54
122	1,238.20	798.26	439.94	95,188.28
123	1,238.20	801.92	436.28	94,386.36
124	1,238.20	805.59	432.60	93,580.77
125	1,238.20	809.29	428.91	92,771.49
126	1,238.20	812.99	425.20	91,958.49
127	1,238.20	816.72	421.48	91,141.77
128	1,238.20	820.46	417.73	90,321.31
129	1,238.20	824.22	413.97	89,497.08
130	1,238.20	828.00	410.19	88,669.08
131	1,238.20	831.80	406.40	87,837.28
132	1,238.20	835.61	402.59	87,001.67
133	1,238.20	839.44	398.76	86,162.23
134	1,238.20	843.29	394.91	85,318.95
135	1,238.20	847.15	391.05	84,471.79
136	1,238.20	851.03	387.16	83,620.76
137	1,238.20	854.94	383.26	82,765.82
138	1,238.20	858.85	379.34	81,906.97
139	1,238.20	862.79	375.41	81,044.18
140	1,238.20	866.74	371.45	80,177.44
141	1,238.20	870.72	367.48	79,306.72
142	1,238.20	874.71	363.49	78,432.01
143	1,238.20	878.72	359.48	77,553.29
144	1,238.20	882.74	355.45	76,670.55
145	1,238.20	886.79	351.41	75,783.76
146	1,238.20	890.85	347.34	74,892.90
147	1,238.20	894.94	343.26	73,997.97
148	1,238.20	899.04	339.16	73,098.93
149	1,238.20	903.16	335.04	72,195.76
150	1,238.20	907.30	330.90	71,288.46
151	1,238.20	911.46	326.74	70,377.01
152	1,238.20	915.64	322.56	69,461.37
153	1,238.20	919.83	318.36	68,541.54
154	1,238.20	924.05	314.15	67,617.49
155	1,238.20	928.28	309.91	66,689.21
156	1,238.20	932.54	305.66	65,756.67
157	1,238.20	936.81	301.38	64,819.86
158	1,238.20	941.11	297.09	63,878.75
159	1,238.20	945.42	292.78	62,933.33
160	1,238.20	949.75	288.44	61,983.58
161	1,238.20	954.11	284.09	61,029.47
162	1,238.20	958.48	279.72	60,070.99
163	1,238.20	962.87	275.33	59,108.12
164	1,238.20	967.28	270.91	58,140.84
165	1,238.20	971.72	266.48	57,169.12
166	1,238.20	976.17	262.03	56,192.95
167	1,238.20	980.65	257.55	55,212.30
168	1,238.20	985.14	253.06	54,227.16
169	1,238.20	989.66	248.54	53,237.50
170	1,238.20	994.19	244.01	52,243.31
171	1,238.20	998.75	239.45	51,244.56
172	1,238.20	1,003.33	234.87	50,241.24
173	1,238.20	1,007.92	230.27	49,233.31
174	1,238.20	1,012.54	225.65	48,220.77
175	1,238.20	1,017.19	221.01	47,203.58
176	1,238.20	1,021.85	216.35	46,181.73
177	1,238.20	1,026.53	211.67	45,155.20
178	1,238.20	1,031.24	206.96	44,123.97
179	1,238.20	1,035.96	202.23	43,088.00
180	1,238.20	1,040.71	197.49	42,047.29
181	1,238.20	1,045.48	192.72	41,001.81
182	1,238.20	1,050.27	187.92	39,951.54
183	1,238.20	1,055.09	183.11	38,896.46
184	1,238.20	1,059.92	178.28	37,836.53
185	1,238.20	1,064.78	173.42	36,771.75
186	1,238.20	1,069.66	168.54	35,702.09
187	1,238.20	1,074.56	163.63	34,627.53
188	1,238.20	1,079.49	158.71	33,548.04
189	1,238.20	1,084.44	153.76	32,463.61
190	1,238.20	1,089.41	148.79	31,374.20
191	1,238.20	1,094.40	143.80	30,279.80
192	1,238.20	1,099.41	138.78	29,180.39
193	1,238.20	1,104.45	133.74	28,075.94
194	1,238.20	1,109.52	128.68	26,966.42
195	1,238.20	1,114.60	123.60	25,851.82
196	1,238.20	1,119.71	118.49	24,732.11
197	1,238.20	1,124.84	113.36	23,607.27
198	1,238.20	1,130.00	108.20	22,477.27
199	1,238.20	1,135.18	103.02	21,342.09
200	1,238.20	1,140.38	97.82	20,201.72
201	1,238.20	1,145.61	92.59	19,056.11
202	1,238.20	1,150.86	87.34	17,905.25
203	1,238.20	1,156.13	82.07	16,749.12
204	1,238.20	1,161.43	76.77	15,587.69
205	1,238.20	1,166.75	71.44	14,420.94
206	1,238.20	1,172.10	66.10	13,248.84
207	1,238.20	1,177.47	60.72	12,071.36
208	1,238.20	1,182.87	55.33	10,888.49
209	1,238.20	1,188.29	49.91	9,700.20
210	1,238.20	1,193.74	44.46	8,506.46
211	1,238.20	1,199.21	38.99	7,307.25
212	1,238.20	1,204.71	33.49	6,102.55
213	1,238.20	1,210.23	27.97	4,892.32
214	1,238.20	1,215.77	22.42	3,676.55
215	1,238.20	1,221.35	16.85	2,455.20
216	1,238.20	1,226.94	11.25	1,228.26
217	1,233.89	1,228.26	5.63	0.00

Comparison

Scenario	Number of payments	Total interest	Total paid
Standard plan	240.00	117,167.32	297,167.32
Your plan	217.00	98,684.47	278,684.47

Formula

balance′ = balance − lump sum, payment unchanged

= 18482.85

Note

This schedule applies the standard amortization formula to the figures you entered. It assumes a fixed rate, payments made on time, and no fees, insurance or rate changes; a real lender's statement will differ.

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Frequently asked questions

What's the difference between this and the extra-payment-savings tool?+

This tool models a single large one-time payment — like a bonus or inheritance — applied at a specific point in the loan, while extra-payment-savings is built around smaller recurring additions.

How much interest do I actually save with a lump sum?+

The savings equal the interest that would have accrued on that amount for every remaining period of the original schedule. Paying a lump sum earlier in the loan saves more than paying the same amount later, since more periods of interest are avoided.

Does the lump sum shorten the loan or reduce future payments?+

By default it shortens the remaining term while keeping the payment amount the same. Some lenders can instead re-amortize to lower your payment at the same term — check which option your loan allows.

Is it better to put a windfall toward the mortgage or invest it?+

That depends on your loan's interest rate versus expected investment returns, and on your tolerance for risk. The calculator only tells you the guaranteed interest saved from paying down the loan, which you can then compare to other options.

What if I make the lump sum payment right after the loan starts?+

That's when it has the most impact, because it eliminates interest on that principal for the maximum number of remaining periods — try different timing to see the difference.

Lump Sum Payment Impact Calculator

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