HELOC Payment Calculator

Estimate the change from interest-only borrowing to a fully amortizing repayment period.

Your estimate

Monthly interest during draw period: $400.00
Monthly payment during repayment: $501.86
Total interest: $108,447.37
Payment increase at repayment: $101.86

Repayment period

Starting values are illustrative, not live quotes. Illustrates one initial draw, interest-only payments during the draw period, and full amortization during repayment. The chart begins at repayment. Rate resets, later draws, fees, floors and balloon clauses are excluded.

Payment schedule

Payment schedule
Month	Payment	Principal	Interest	Balance
1	$501.86	$101.86	$400.00	$59,898.14
2	$501.86	$102.54	$399.32	$59,795.59
3	$501.86	$103.23	$398.64	$59,692.37
4	$501.86	$103.91	$397.95	$59,588.45
5	$501.86	$104.61	$397.26	$59,483.84
6	$501.86	$105.31	$396.56	$59,378.54
7	$501.86	$106.01	$395.86	$59,272.53
8	$501.86	$106.71	$395.15	$59,165.82
9	$501.86	$107.43	$394.44	$59,058.39
10	$501.86	$108.14	$393.72	$58,950.25
11	$501.86	$108.86	$393.00	$58,841.39
12	$501.86	$109.59	$392.28	$58,731.80
13	$501.86	$110.32	$391.55	$58,621.48
14	$501.86	$111.05	$390.81	$58,510.43
15	$501.86	$111.79	$390.07	$58,398.63
16	$501.86	$112.54	$389.32	$58,286.09
17	$501.86	$113.29	$388.57	$58,172.80
18	$501.86	$114.05	$387.82	$58,058.76
19	$501.86	$114.81	$387.06	$57,943.95
20	$501.86	$115.57	$386.29	$57,828.38
21	$501.86	$116.34	$385.52	$57,712.04
22	$501.86	$117.12	$384.75	$57,594.92
23	$501.86	$117.90	$383.97	$57,477.02
24	$501.86	$118.68	$383.18	$57,358.34
25	$501.86	$119.48	$382.39	$57,238.87
26	$501.86	$120.27	$381.59	$57,118.59
27	$501.86	$121.07	$380.79	$56,997.52
28	$501.86	$121.88	$379.98	$56,875.64
29	$501.86	$122.69	$379.17	$56,752.95
30	$501.86	$123.51	$378.35	$56,629.44
31	$501.86	$124.33	$377.53	$56,505.10
32	$501.86	$125.16	$376.70	$56,379.94
33	$501.86	$126.00	$375.87	$56,253.94
34	$501.86	$126.84	$375.03	$56,127.10
35	$501.86	$127.68	$374.18	$55,999.42
36	$501.86	$128.53	$373.33	$55,870.88
37	$501.86	$129.39	$372.47	$55,741.49
38	$501.86	$130.25	$371.61	$55,611.24
39	$501.86	$131.12	$370.74	$55,480.12
40	$501.86	$132.00	$369.87	$55,348.12
41	$501.86	$132.88	$368.99	$55,215.24
42	$501.86	$133.76	$368.10	$55,081.48
43	$501.86	$134.65	$367.21	$54,946.83
44	$501.86	$135.55	$366.31	$54,811.27
45	$501.86	$136.46	$365.41	$54,674.82
46	$501.86	$137.37	$364.50	$54,537.45
47	$501.86	$138.28	$363.58	$54,399.17
48	$501.86	$139.20	$362.66	$54,259.97
49	$501.86	$140.13	$361.73	$54,119.84
50	$501.86	$141.07	$360.80	$53,978.77
51	$501.86	$142.01	$359.86	$53,836.77
52	$501.86	$142.95	$358.91	$53,693.82
53	$501.86	$143.91	$357.96	$53,549.91
54	$501.86	$144.86	$357.00	$53,405.05
55	$501.86	$145.83	$356.03	$53,259.22
56	$501.86	$146.80	$355.06	$53,112.41
57	$501.86	$147.78	$354.08	$52,964.63
58	$501.86	$148.77	$353.10	$52,815.87
59	$501.86	$149.76	$352.11	$52,666.11
60	$501.86	$150.76	$351.11	$52,515.35
61	$501.86	$151.76	$350.10	$52,363.59
62	$501.86	$152.77	$349.09	$52,210.82
63	$501.86	$153.79	$348.07	$52,057.02
64	$501.86	$154.82	$347.05	$51,902.21
65	$501.86	$155.85	$346.01	$51,746.36
66	$501.86	$156.89	$344.98	$51,589.47
67	$501.86	$157.93	$343.93	$51,431.53
68	$501.86	$158.99	$342.88	$51,272.55
69	$501.86	$160.05	$341.82	$51,112.50
70	$501.86	$161.11	$340.75	$50,951.39
71	$501.86	$162.19	$339.68	$50,789.20
72	$501.86	$163.27	$338.59	$50,625.93
73	$501.86	$164.36	$337.51	$50,461.57
74	$501.86	$165.45	$336.41	$50,296.12
75	$501.86	$166.56	$335.31	$50,129.56
76	$501.86	$167.67	$334.20	$49,961.89
77	$501.86	$168.78	$333.08	$49,793.11
78	$501.86	$169.91	$331.95	$49,623.20
79	$501.86	$171.04	$330.82	$49,452.16
80	$501.86	$172.18	$329.68	$49,279.97
81	$501.86	$173.33	$328.53	$49,106.64
82	$501.86	$174.49	$327.38	$48,932.16
83	$501.86	$175.65	$326.21	$48,756.51
84	$501.86	$176.82	$325.04	$48,579.69
85	$501.86	$178.00	$323.86	$48,401.69
86	$501.86	$179.19	$322.68	$48,222.50
87	$501.86	$180.38	$321.48	$48,042.12
88	$501.86	$181.58	$320.28	$47,860.54
89	$501.86	$182.79	$319.07	$47,677.74
90	$501.86	$184.01	$317.85	$47,493.73
91	$501.86	$185.24	$316.62	$47,308.49
92	$501.86	$186.47	$315.39	$47,122.02
93	$501.86	$187.72	$314.15	$46,934.30
94	$501.86	$188.97	$312.90	$46,745.33
95	$501.86	$190.23	$311.64	$46,555.10
96	$501.86	$191.50	$310.37	$46,363.61
97	$501.86	$192.77	$309.09	$46,170.83
98	$501.86	$194.06	$307.81	$45,976.77
99	$501.86	$195.35	$306.51	$45,781.42
100	$501.86	$196.65	$305.21	$45,584.77
101	$501.86	$197.97	$303.90	$45,386.80
102	$501.86	$199.29	$302.58	$45,187.52
103	$501.86	$200.61	$301.25	$44,986.90
104	$501.86	$201.95	$299.91	$44,784.95
105	$501.86	$203.30	$298.57	$44,581.65
106	$501.86	$204.65	$297.21	$44,377.00
107	$501.86	$206.02	$295.85	$44,170.98
108	$501.86	$207.39	$294.47	$43,963.59
109	$501.86	$208.77	$293.09	$43,754.82
110	$501.86	$210.17	$291.70	$43,544.65
111	$501.86	$211.57	$290.30	$43,333.09
112	$501.86	$212.98	$288.89	$43,120.11
113	$501.86	$214.40	$287.47	$42,905.71
114	$501.86	$215.83	$286.04	$42,689.89
115	$501.86	$217.26	$284.60	$42,472.62
116	$501.86	$218.71	$283.15	$42,253.91
117	$501.86	$220.17	$281.69	$42,033.74
118	$501.86	$221.64	$280.22	$41,812.10
119	$501.86	$223.12	$278.75	$41,588.98
120	$501.86	$224.60	$277.26	$41,364.38
121	$501.86	$226.10	$275.76	$41,138.28
122	$501.86	$227.61	$274.26	$40,910.67
123	$501.86	$229.13	$272.74	$40,681.54
124	$501.86	$230.65	$271.21	$40,450.89
125	$501.86	$232.19	$269.67	$40,218.70
126	$501.86	$233.74	$268.12	$39,984.96
127	$501.86	$235.30	$266.57	$39,749.66
128	$501.86	$236.87	$265.00	$39,512.79
129	$501.86	$238.45	$263.42	$39,274.35
130	$501.86	$240.04	$261.83	$39,034.31
131	$501.86	$241.64	$260.23	$38,792.68
132	$501.86	$243.25	$258.62	$38,549.43
133	$501.86	$244.87	$257.00	$38,304.56
134	$501.86	$246.50	$255.36	$38,058.06
135	$501.86	$248.14	$253.72	$37,809.92
136	$501.86	$249.80	$252.07	$37,560.12
137	$501.86	$251.46	$250.40	$37,308.66
138	$501.86	$253.14	$248.72	$37,055.52
139	$501.86	$254.83	$247.04	$36,800.69
140	$501.86	$256.53	$245.34	$36,544.16
141	$501.86	$258.24	$243.63	$36,285.93
142	$501.86	$259.96	$241.91	$36,025.97
143	$501.86	$261.69	$240.17	$35,764.28
144	$501.86	$263.44	$238.43	$35,500.84
145	$501.86	$265.19	$236.67	$35,235.65
146	$501.86	$266.96	$234.90	$34,968.69
147	$501.86	$268.74	$233.12	$34,699.95
148	$501.86	$270.53	$231.33	$34,429.42
149	$501.86	$272.33	$229.53	$34,157.09
150	$501.86	$274.15	$227.71	$33,882.94
151	$501.86	$275.98	$225.89	$33,606.96
152	$501.86	$277.82	$224.05	$33,329.14
153	$501.86	$279.67	$222.19	$33,049.47
154	$501.86	$281.53	$220.33	$32,767.94
155	$501.86	$283.41	$218.45	$32,484.53
156	$501.86	$285.30	$216.56	$32,199.23
157	$501.86	$287.20	$214.66	$31,912.02
158	$501.86	$289.12	$212.75	$31,622.91
159	$501.86	$291.04	$210.82	$31,331.86
160	$501.86	$292.98	$208.88	$31,038.88
161	$501.86	$294.94	$206.93	$30,743.94
162	$501.86	$296.90	$204.96	$30,447.03
163	$501.86	$298.88	$202.98	$30,148.15
164	$501.86	$300.88	$200.99	$29,847.27
165	$501.86	$302.88	$198.98	$29,544.39
166	$501.86	$304.90	$196.96	$29,239.49
167	$501.86	$306.93	$194.93	$28,932.56
168	$501.86	$308.98	$192.88	$28,623.58
169	$501.86	$311.04	$190.82	$28,312.54
170	$501.86	$313.11	$188.75	$27,999.42
171	$501.86	$315.20	$186.66	$27,684.22
172	$501.86	$317.30	$184.56	$27,366.92
173	$501.86	$319.42	$182.45	$27,047.50
174	$501.86	$321.55	$180.32	$26,725.95
175	$501.86	$323.69	$178.17	$26,402.26
176	$501.86	$325.85	$176.02	$26,076.41
177	$501.86	$328.02	$173.84	$25,748.39
178	$501.86	$330.21	$171.66	$25,418.18
179	$501.86	$332.41	$169.45	$25,085.77
180	$501.86	$334.63	$167.24	$24,751.15
181	$501.86	$336.86	$165.01	$24,414.29
182	$501.86	$339.10	$162.76	$24,075.19
183	$501.86	$341.36	$160.50	$23,733.83
184	$501.86	$343.64	$158.23	$23,390.19
185	$501.86	$345.93	$155.93	$23,044.26
186	$501.86	$348.24	$153.63	$22,696.02
187	$501.86	$350.56	$151.31	$22,345.47
188	$501.86	$352.89	$148.97	$21,992.57
189	$501.86	$355.25	$146.62	$21,637.33
190	$501.86	$357.62	$144.25	$21,279.71
191	$501.86	$360.00	$141.86	$20,919.71
192	$501.86	$362.40	$139.46	$20,557.31
193	$501.86	$364.82	$137.05	$20,192.50
194	$501.86	$367.25	$134.62	$19,825.25
195	$501.86	$369.70	$132.17	$19,455.55
196	$501.86	$372.16	$129.70	$19,083.39
197	$501.86	$374.64	$127.22	$18,708.75
198	$501.86	$377.14	$124.73	$18,331.61
199	$501.86	$379.65	$122.21	$17,951.96
200	$501.86	$382.18	$119.68	$17,569.77
201	$501.86	$384.73	$117.13	$17,185.04
202	$501.86	$387.30	$114.57	$16,797.75
203	$501.86	$389.88	$111.98	$16,407.87
204	$501.86	$392.48	$109.39	$16,015.39
205	$501.86	$395.09	$106.77	$15,620.29
206	$501.86	$397.73	$104.14	$15,222.56
207	$501.86	$400.38	$101.48	$14,822.18
208	$501.86	$403.05	$98.81	$14,419.13
209	$501.86	$405.74	$96.13	$14,013.40
210	$501.86	$408.44	$93.42	$13,604.96
211	$501.86	$411.16	$90.70	$13,193.79
212	$501.86	$413.91	$87.96	$12,779.89
213	$501.86	$416.66	$85.20	$12,363.22
214	$501.86	$419.44	$82.42	$11,943.78
215	$501.86	$422.24	$79.63	$11,521.54
216	$501.86	$425.05	$76.81	$11,096.49
217	$501.86	$427.89	$73.98	$10,668.60
218	$501.86	$430.74	$71.12	$10,237.86
219	$501.86	$433.61	$68.25	$9,804.25
220	$501.86	$436.50	$65.36	$9,367.75
221	$501.86	$439.41	$62.45	$8,928.33
222	$501.86	$442.34	$59.52	$8,485.99
223	$501.86	$445.29	$56.57	$8,040.70
224	$501.86	$448.26	$53.60	$7,592.44
225	$501.86	$451.25	$50.62	$7,141.19
226	$501.86	$454.26	$47.61	$6,686.94
227	$501.86	$457.28	$44.58	$6,229.65
228	$501.86	$460.33	$41.53	$5,769.32
229	$501.86	$463.40	$38.46	$5,305.92
230	$501.86	$466.49	$35.37	$4,839.43
231	$501.86	$469.60	$32.26	$4,369.83
232	$501.86	$472.73	$29.13	$3,897.09
233	$501.86	$475.88	$25.98	$3,421.21
234	$501.86	$479.06	$22.81	$2,942.15
235	$501.86	$482.25	$19.61	$2,459.90
236	$501.86	$485.46	$16.40	$1,974.44
237	$501.86	$488.70	$13.16	$1,485.74
238	$501.86	$491.96	$9.90	$993.78
239	$501.86	$495.24	$6.63	$498.54
240	$501.86	$498.54	$3.32	$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 entered balance is assumed drawn at the start and held constant during the draw period. Monthly interest is paid without principal reduction. At repayment, the balance is amortized over the entered repayment term. The interest rate is held constant for both phases.

Draw interest = drawn balance × annual rate ÷ 12

Worked example

Illustrative inputs — not a quote or a local average.

Drawn balance: $60,000.00
Interest rate: 8 %
Draw period: 10 years
Repayment term: 20 years

Monthly interest during draw period: $400.00. Monthly payment during repayment: $501.86. Total interest: $108,447.37.

Reading the result

Use the difference between draw and repayment payments as a starting stress test. Then rerun with a higher interest rate. The draw payment is not the complete lifetime cost, and an unused credit limit should not be entered as though it has already been borrowed.

Before acting on the estimate

Actual HELOCs may permit repeated draws, charge annual fees or use different minimum-payment formulas. The tool does not predict rate resets. Review the agreement for index, margin, caps, floors and any required balloon payment.