Interest Only Then Amortizing
Calculator

Interest-only payment

$1,375.00

Results

Interest-only payment: $1,375.00
Payment after interest-only: $1,917.86
Total interest: $262,330.18
Extra interest vs standard: $9,651.44

Balance and interest over time

Remaining balance
Interest paid to date

Payment schedule


1	1,375.00	0.00	1,375.00	300,000.00
2	1,375.00	0.00	1,375.00	300,000.00
3	1,375.00	0.00	1,375.00	300,000.00
4	1,375.00	0.00	1,375.00	300,000.00
5	1,375.00	0.00	1,375.00	300,000.00
6	1,375.00	0.00	1,375.00	300,000.00
7	1,375.00	0.00	1,375.00	300,000.00
8	1,375.00	0.00	1,375.00	300,000.00
9	1,375.00	0.00	1,375.00	300,000.00
10	1,375.00	0.00	1,375.00	300,000.00
11	1,375.00	0.00	1,375.00	300,000.00
12	1,375.00	0.00	1,375.00	300,000.00
13	1,375.00	0.00	1,375.00	300,000.00
14	1,375.00	0.00	1,375.00	300,000.00
15	1,375.00	0.00	1,375.00	300,000.00
16	1,375.00	0.00	1,375.00	300,000.00
17	1,375.00	0.00	1,375.00	300,000.00
18	1,375.00	0.00	1,375.00	300,000.00
19	1,375.00	0.00	1,375.00	300,000.00
20	1,375.00	0.00	1,375.00	300,000.00
21	1,375.00	0.00	1,375.00	300,000.00
22	1,375.00	0.00	1,375.00	300,000.00
23	1,375.00	0.00	1,375.00	300,000.00
24	1,375.00	0.00	1,375.00	300,000.00
25	1,917.86	542.86	1,375.00	299,457.14
26	1,917.86	545.35	1,372.51	298,911.79
27	1,917.86	547.85	1,370.01	298,363.94
28	1,917.86	550.36	1,367.50	297,813.57
29	1,917.86	552.88	1,364.98	297,260.69
30	1,917.86	555.42	1,362.44	296,705.27
31	1,917.86	557.96	1,359.90	296,147.31
32	1,917.86	560.52	1,357.34	295,586.79
33	1,917.86	563.09	1,354.77	295,023.70
34	1,917.86	565.67	1,352.19	294,458.03
35	1,917.86	568.26	1,349.60	293,889.76
36	1,917.86	570.87	1,346.99	293,318.89
37	1,917.86	573.48	1,344.38	292,745.41
38	1,917.86	576.11	1,341.75	292,169.30
39	1,917.86	578.75	1,339.11	291,590.54
40	1,917.86	581.41	1,336.46	291,009.14
41	1,917.86	584.07	1,333.79	290,425.06
42	1,917.86	586.75	1,331.11	289,838.32
43	1,917.86	589.44	1,328.43	289,248.88
44	1,917.86	592.14	1,325.72	288,656.74
45	1,917.86	594.85	1,323.01	288,061.89
46	1,917.86	597.58	1,320.28	287,464.31
47	1,917.86	600.32	1,317.54	286,863.99
48	1,917.86	603.07	1,314.79	286,260.92
49	1,917.86	605.83	1,312.03	285,655.09
50	1,917.86	608.61	1,309.25	285,046.48
51	1,917.86	611.40	1,306.46	284,435.08
52	1,917.86	614.20	1,303.66	283,820.87
53	1,917.86	617.02	1,300.85	283,203.86
54	1,917.86	619.85	1,298.02	282,584.01
55	1,917.86	622.69	1,295.18	281,961.32
56	1,917.86	625.54	1,292.32	281,335.78
57	1,917.86	628.41	1,289.46	280,707.38
58	1,917.86	631.29	1,286.58	280,076.09
59	1,917.86	634.18	1,283.68	279,441.91
60	1,917.86	637.09	1,280.78	278,804.82
61	1,917.86	640.01	1,277.86	278,164.81
62	1,917.86	642.94	1,274.92	277,521.87
63	1,917.86	645.89	1,271.98	276,875.98
64	1,917.86	648.85	1,269.01	276,227.14
65	1,917.86	651.82	1,266.04	275,575.31
66	1,917.86	654.81	1,263.05	274,920.51
67	1,917.86	657.81	1,260.05	274,262.69
68	1,917.86	660.83	1,257.04	273,601.87
69	1,917.86	663.85	1,254.01	272,938.01
70	1,917.86	666.90	1,250.97	272,271.12
71	1,917.86	669.95	1,247.91	271,601.16
72	1,917.86	673.02	1,244.84	270,928.14
73	1,917.86	676.11	1,241.75	270,252.03
74	1,917.86	679.21	1,238.66	269,572.82
75	1,917.86	682.32	1,235.54	268,890.50
76	1,917.86	685.45	1,232.41	268,205.05
77	1,917.86	688.59	1,229.27	267,516.46
78	1,917.86	691.75	1,226.12	266,824.72
79	1,917.86	694.92	1,222.95	266,129.80
80	1,917.86	698.10	1,219.76	265,431.70
81	1,917.86	701.30	1,216.56	264,730.40
82	1,917.86	704.52	1,213.35	264,025.88
83	1,917.86	707.74	1,210.12	263,318.14
84	1,917.86	710.99	1,206.87	262,607.15
85	1,917.86	714.25	1,203.62	261,892.90
86	1,917.86	717.52	1,200.34	261,175.38
87	1,917.86	720.81	1,197.05	260,454.57
88	1,917.86	724.11	1,193.75	259,730.46
89	1,917.86	727.43	1,190.43	259,003.03
90	1,917.86	730.77	1,187.10	258,272.26
91	1,917.86	734.12	1,183.75	257,538.15
92	1,917.86	737.48	1,180.38	256,800.67
93	1,917.86	740.86	1,177.00	256,059.81
94	1,917.86	744.26	1,173.61	255,315.55
95	1,917.86	747.67	1,170.20	254,567.89
96	1,917.86	751.09	1,166.77	253,816.79
97	1,917.86	754.54	1,163.33	253,062.26
98	1,917.86	757.99	1,159.87	252,304.26
99	1,917.86	761.47	1,156.39	251,542.80
100	1,917.86	764.96	1,152.90	250,777.84
101	1,917.86	768.46	1,149.40	250,009.37
102	1,917.86	771.99	1,145.88	249,237.39
103	1,917.86	775.52	1,142.34	248,461.86
104	1,917.86	779.08	1,138.78	247,682.78
105	1,917.86	782.65	1,135.21	246,900.13
106	1,917.86	786.24	1,131.63	246,113.89
107	1,917.86	789.84	1,128.02	245,324.05
108	1,917.86	793.46	1,124.40	244,530.59
109	1,917.86	797.10	1,120.77	243,733.49
110	1,917.86	800.75	1,117.11	242,932.74
111	1,917.86	804.42	1,113.44	242,128.32
112	1,917.86	808.11	1,109.75	241,320.21
113	1,917.86	811.81	1,106.05	240,508.40
114	1,917.86	815.53	1,102.33	239,692.87
115	1,917.86	819.27	1,098.59	238,873.60
116	1,917.86	823.03	1,094.84	238,050.57
117	1,917.86	826.80	1,091.07	237,223.77
118	1,917.86	830.59	1,087.28	236,393.19
119	1,917.86	834.39	1,083.47	235,558.79
120	1,917.86	838.22	1,079.64	234,720.57
121	1,917.86	842.06	1,075.80	233,878.51
122	1,917.86	845.92	1,071.94	233,032.59
123	1,917.86	849.80	1,068.07	232,182.80
124	1,917.86	853.69	1,064.17	231,329.11
125	1,917.86	857.60	1,060.26	230,471.50
126	1,917.86	861.54	1,056.33	229,609.97
127	1,917.86	865.48	1,052.38	228,744.48
128	1,917.86	869.45	1,048.41	227,875.03
129	1,917.86	873.44	1,044.43	227,001.60
130	1,917.86	877.44	1,040.42	226,124.16
131	1,917.86	881.46	1,036.40	225,242.70
132	1,917.86	885.50	1,032.36	224,357.19
133	1,917.86	889.56	1,028.30	223,467.64
134	1,917.86	893.64	1,024.23	222,574.00
135	1,917.86	897.73	1,020.13	221,676.27
136	1,917.86	901.85	1,016.02	220,774.42
137	1,917.86	905.98	1,011.88	219,868.44
138	1,917.86	910.13	1,007.73	218,958.31
139	1,917.86	914.30	1,003.56	218,044.00
140	1,917.86	918.49	999.37	217,125.51
141	1,917.86	922.70	995.16	216,202.80
142	1,917.86	926.93	990.93	215,275.87
143	1,917.86	931.18	986.68	214,344.69
144	1,917.86	935.45	982.41	213,409.24
145	1,917.86	939.74	978.13	212,469.50
146	1,917.86	944.04	973.82	211,525.46
147	1,917.86	948.37	969.49	210,577.09
148	1,917.86	952.72	965.14	209,624.37
149	1,917.86	957.08	960.78	208,667.28
150	1,917.86	961.47	956.39	207,705.81
151	1,917.86	965.88	951.98	206,739.93
152	1,917.86	970.30	947.56	205,769.63
153	1,917.86	974.75	943.11	204,794.88
154	1,917.86	979.22	938.64	203,815.66
155	1,917.86	983.71	934.16	202,831.95
156	1,917.86	988.22	929.65	201,843.73
157	1,917.86	992.75	925.12	200,850.99
158	1,917.86	997.30	920.57	199,853.69
159	1,917.86	1,001.87	916.00	198,851.82
160	1,917.86	1,006.46	911.40	197,845.37
161	1,917.86	1,011.07	906.79	196,834.29
162	1,917.86	1,015.71	902.16	195,818.59
163	1,917.86	1,020.36	897.50	194,798.23
164	1,917.86	1,025.04	892.83	193,773.19
165	1,917.86	1,029.74	888.13	192,743.45
166	1,917.86	1,034.46	883.41	191,709.00
167	1,917.86	1,039.20	878.67	190,669.80
168	1,917.86	1,043.96	873.90	189,625.84
169	1,917.86	1,048.74	869.12	188,577.10
170	1,917.86	1,053.55	864.31	187,523.55
171	1,917.86	1,058.38	859.48	186,465.17
172	1,917.86	1,063.23	854.63	185,401.93
173	1,917.86	1,068.10	849.76	184,333.83
174	1,917.86	1,073.00	844.86	183,260.83
175	1,917.86	1,077.92	839.95	182,182.91
176	1,917.86	1,082.86	835.01	181,100.06
177	1,917.86	1,087.82	830.04	180,012.23
178	1,917.86	1,092.81	825.06	178,919.43
179	1,917.86	1,097.82	820.05	177,821.61
180	1,917.86	1,102.85	815.02	176,718.76
181	1,917.86	1,107.90	809.96	175,610.86
182	1,917.86	1,112.98	804.88	174,497.88
183	1,917.86	1,118.08	799.78	173,379.80
184	1,917.86	1,123.21	794.66	172,256.60
185	1,917.86	1,128.35	789.51	171,128.24
186	1,917.86	1,133.53	784.34	169,994.72
187	1,917.86	1,138.72	779.14	168,856.00
188	1,917.86	1,143.94	773.92	167,712.06
189	1,917.86	1,149.18	768.68	166,562.87
190	1,917.86	1,154.45	763.41	165,408.42
191	1,917.86	1,159.74	758.12	164,248.68
192	1,917.86	1,165.06	752.81	163,083.63
193	1,917.86	1,170.40	747.47	161,913.23
194	1,917.86	1,175.76	742.10	160,737.47
195	1,917.86	1,181.15	736.71	159,556.32
196	1,917.86	1,186.56	731.30	158,369.76
197	1,917.86	1,192.00	725.86	157,177.76
198	1,917.86	1,197.46	720.40	155,980.29
199	1,917.86	1,202.95	714.91	154,777.34
200	1,917.86	1,208.47	709.40	153,568.87
201	1,917.86	1,214.01	703.86	152,354.87
202	1,917.86	1,219.57	698.29	151,135.30
203	1,917.86	1,225.16	692.70	149,910.14
204	1,917.86	1,230.77	687.09	148,679.36
205	1,917.86	1,236.42	681.45	147,442.94
206	1,917.86	1,242.08	675.78	146,200.86
207	1,917.86	1,247.78	670.09	144,953.09
208	1,917.86	1,253.49	664.37	143,699.59
209	1,917.86	1,259.24	658.62	142,440.35
210	1,917.86	1,265.01	652.85	141,175.34
211	1,917.86	1,270.81	647.05	139,904.53
212	1,917.86	1,276.63	641.23	138,627.90
213	1,917.86	1,282.49	635.38	137,345.41
214	1,917.86	1,288.36	629.50	136,057.05
215	1,917.86	1,294.27	623.59	134,762.78
216	1,917.86	1,300.20	617.66	133,462.58
217	1,917.86	1,306.16	611.70	132,156.42
218	1,917.86	1,312.15	605.72	130,844.28
219	1,917.86	1,318.16	599.70	129,526.12
220	1,917.86	1,324.20	593.66	128,201.91
221	1,917.86	1,330.27	587.59	126,871.64
222	1,917.86	1,336.37	581.50	125,535.27
223	1,917.86	1,342.49	575.37	124,192.78
224	1,917.86	1,348.65	569.22	122,844.14
225	1,917.86	1,354.83	563.04	121,489.31
226	1,917.86	1,361.04	556.83	120,128.27
227	1,917.86	1,367.28	550.59	118,761.00
228	1,917.86	1,373.54	544.32	117,387.45
229	1,917.86	1,379.84	538.03	116,007.62
230	1,917.86	1,386.16	531.70	114,621.46
231	1,917.86	1,392.51	525.35	113,228.94
232	1,917.86	1,398.90	518.97	111,830.04
233	1,917.86	1,405.31	512.55	110,424.74
234	1,917.86	1,411.75	506.11	109,012.99
235	1,917.86	1,418.22	499.64	107,594.77
236	1,917.86	1,424.72	493.14	106,170.05
237	1,917.86	1,431.25	486.61	104,738.80
238	1,917.86	1,437.81	480.05	103,300.99
239	1,917.86	1,444.40	473.46	101,856.59
240	1,917.86	1,451.02	466.84	100,405.56
241	1,917.86	1,457.67	460.19	98,947.89
242	1,917.86	1,464.35	453.51	97,483.54
243	1,917.86	1,471.06	446.80	96,012.48
244	1,917.86	1,477.81	440.06	94,534.67
245	1,917.86	1,484.58	433.28	93,050.09
246	1,917.86	1,491.38	426.48	91,558.71
247	1,917.86	1,498.22	419.64	90,060.49
248	1,917.86	1,505.09	412.78	88,555.41
249	1,917.86	1,511.98	405.88	87,043.42
250	1,917.86	1,518.91	398.95	85,524.51
251	1,917.86	1,525.88	391.99	83,998.63
252	1,917.86	1,532.87	384.99	82,465.76
253	1,917.86	1,539.89	377.97	80,925.87
254	1,917.86	1,546.95	370.91	79,378.92
255	1,917.86	1,554.04	363.82	77,824.87
256	1,917.86	1,561.17	356.70	76,263.71
257	1,917.86	1,568.32	349.54	74,695.39
258	1,917.86	1,575.51	342.35	73,119.88
259	1,917.86	1,582.73	335.13	71,537.15
260	1,917.86	1,589.98	327.88	69,947.16
261	1,917.86	1,597.27	320.59	68,349.89
262	1,917.86	1,604.59	313.27	66,745.30
263	1,917.86	1,611.95	305.92	65,133.35
264	1,917.86	1,619.34	298.53	63,514.02
265	1,917.86	1,626.76	291.11	61,887.26
266	1,917.86	1,634.21	283.65	60,253.05
267	1,917.86	1,641.70	276.16	58,611.34
268	1,917.86	1,649.23	268.64	56,962.11
269	1,917.86	1,656.79	261.08	55,305.33
270	1,917.86	1,664.38	253.48	53,640.95
271	1,917.86	1,672.01	245.85	51,968.94
272	1,917.86	1,679.67	238.19	50,289.27
273	1,917.86	1,687.37	230.49	48,601.90
274	1,917.86	1,695.10	222.76	46,906.79
275	1,917.86	1,702.87	214.99	45,203.92
276	1,917.86	1,710.68	207.18	43,493.24
277	1,917.86	1,718.52	199.34	41,774.72
278	1,917.86	1,726.40	191.47	40,048.33
279	1,917.86	1,734.31	183.55	38,314.02
280	1,917.86	1,742.26	175.61	36,571.76
281	1,917.86	1,750.24	167.62	34,821.52
282	1,917.86	1,758.26	159.60	33,063.25
283	1,917.86	1,766.32	151.54	31,296.93
284	1,917.86	1,774.42	143.44	29,522.51
285	1,917.86	1,782.55	135.31	27,739.96
286	1,917.86	1,790.72	127.14	25,949.24
287	1,917.86	1,798.93	118.93	24,150.31
288	1,917.86	1,807.17	110.69	22,343.14
289	1,917.86	1,815.46	102.41	20,527.68
290	1,917.86	1,823.78	94.09	18,703.90
291	1,917.86	1,832.14	85.73	16,871.76
292	1,917.86	1,840.53	77.33	15,031.23
293	1,917.86	1,848.97	68.89	13,182.26
294	1,917.86	1,857.44	60.42	11,324.82
295	1,917.86	1,865.96	51.91	9,458.86
296	1,917.86	1,874.51	43.35	7,584.35
297	1,917.86	1,883.10	34.76	5,701.25
298	1,917.86	1,891.73	26.13	3,809.52
299	1,917.86	1,900.40	17.46	1,909.11
300	1,917.86	1,909.11	8.75	0.00

Comparison

Scenario	Total interest	Total paid
Standard plan	252,678.74	552,678.74
Your plan	262,330.18	562,330.18

Formula

IO: M = P × r; then M = P[r(1+r)^n]/[(1+r)^n−1]

= 9651.44

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

Why does my payment jump so much after the interest-only period ends?+

During the interest-only phase you're not reducing principal at all, so when amortization begins, the full remaining balance must be paid off in a shorter time than the original term — the same debt now amortizes over fewer years, raising the payment.

Does an interest-only period save me money overall?+

No — it doesn't reduce total interest paid over the life of the loan; it only defers principal reduction, which means more total interest accrues because the balance stays higher for longer.

Who typically uses an interest-only loan structure?+

It's common for borrowers expecting rising income, a future lump sum, or short ownership horizons — anyone who values lower payments now over paying down the balance, but it carries real risk if income or values don't rise as expected.

What happens if I make extra payments during the interest-only phase?+

Any payment above the interest-only amount reduces principal, which lowers the balance the amortizing period will later be calculated on — this is one way to soften the payment jump at conversion.

How is the post-conversion payment calculated?+

It re-amortizes the remaining principal balance over the remaining loan term at the current rate, which is why a shorter remaining term after a longer interest-only period produces a bigger jump in the required payment.

Interest Only Then Amortizing Calculator

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