🔑 HELOC Calculator
Find out how large a home equity line of credit you can get, and what you'll pay during the interest-only draw period and the repayment period.
Quick answer: With a $450,000 home, a $250,000 mortgage and an 85% CLTV limit you can get a HELOC of up to $132,500; borrowing $50,000 at 7.5% costs $312.50 a month interest-only during a 10-year draw period, then $402.80 a month over a 20-year repayment period.
Updated · Free · No sign-up · Works on any device
HELOC Calculator inputs
Result
Maximum HELOC credit line
$132,500
85% of $450,000 minus your $250,000 mortgage
| Home equity | $200,000 |
| Amount borrowed | $50,000 |
| Interest-only payment (draw period, 10 years) | $312.50 / month |
| Repayment payment (20 years) | $402.80 / month |
- Payment jump at repayment
- $90.30
- Combined LTV after borrowing
- 66.7%
- Total interest
- $84,170
- Total repaid
- $134,170
Assumes the full amount is drawn at the start and the rate stays fixed. HELOC rates are usually variable, so payments change with the prime rate.
Draw vs. repayment period
| Phase | Monthly payment | Interest paid |
|---|---|---|
| Draw (years 1–10) | $312.50 | $37,500.00 |
| Repayment (years 11–30) | $402.80 | $46,670.13 |
Credit line at different CLTV limits
| CLTV limit | Maximum credit line |
|---|---|
| 80% | $110,000 |
| 85% | $132,500 |
| 90% | $155,000 |
PrincipalInterest
Amortization schedule
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $1,121.64 | $3,711.96 | $48,878.36 |
| 2 | $1,208.72 | $3,624.88 | $47,669.64 |
| 3 | $1,302.53 | $3,531.07 | $46,367.11 |
| 4 | $1,403.66 | $3,429.94 | $44,963.45 |
| 5 | $1,512.65 | $3,320.95 | $43,450.80 |
| 6 | $1,630.06 | $3,203.54 | $41,820.74 |
| 7 | $1,756.61 | $3,076.99 | $40,064.13 |
| 8 | $1,892.97 | $2,940.63 | $38,171.16 |
| 9 | $2,039.94 | $2,793.66 | $36,131.22 |
| 10 | $2,198.31 | $2,635.29 | $33,932.91 |
| 11 | $2,368.96 | $2,464.64 | $31,563.95 |
| 12 | $2,552.88 | $2,280.72 | $29,011.07 |
| 13 | $2,751.07 | $2,082.53 | $26,260.00 |
| 14 | $2,964.64 | $1,868.96 | $23,295.36 |
| 15 | $3,194.78 | $1,638.82 | $20,100.58 |
| 16 | $3,442.81 | $1,390.79 | $16,657.77 |
| 17 | $3,710.08 | $1,123.52 | $12,947.69 |
| 18 | $3,998.11 | $835.49 | $8,949.58 |
| 19 | $4,308.48 | $525.12 | $4,641.10 |
| 20 | $4,641.10 | $190.63 | $0.00 |
Show monthly schedule (240 payments)
| # | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $402.80 | $90.30 | $312.50 | $49,909.70 |
| 2 | $402.80 | $90.86 | $311.94 | $49,818.84 |
| 3 | $402.80 | $91.43 | $311.37 | $49,727.41 |
| 4 | $402.80 | $92.00 | $310.80 | $49,635.41 |
| 5 | $402.80 | $92.58 | $310.22 | $49,542.83 |
| 6 | $402.80 | $93.16 | $309.64 | $49,449.67 |
| 7 | $402.80 | $93.74 | $309.06 | $49,355.93 |
| 8 | $402.80 | $94.33 | $308.47 | $49,261.60 |
| 9 | $402.80 | $94.91 | $307.89 | $49,166.69 |
| 10 | $402.80 | $95.51 | $307.29 | $49,071.18 |
| 11 | $402.80 | $96.11 | $306.69 | $48,975.07 |
| 12 | $402.80 | $96.71 | $306.09 | $48,878.36 |
| 13 | $402.80 | $97.31 | $305.49 | $48,781.05 |
| 14 | $402.80 | $97.92 | $304.88 | $48,683.13 |
| 15 | $402.80 | $98.53 | $304.27 | $48,584.60 |
| 16 | $402.80 | $99.15 | $303.65 | $48,485.45 |
| 17 | $402.80 | $99.77 | $303.03 | $48,385.68 |
| 18 | $402.80 | $100.39 | $302.41 | $48,285.29 |
| 19 | $402.80 | $101.02 | $301.78 | $48,184.27 |
| 20 | $402.80 | $101.65 | $301.15 | $48,082.62 |
| 21 | $402.80 | $102.28 | $300.52 | $47,980.34 |
| 22 | $402.80 | $102.92 | $299.88 | $47,877.42 |
| 23 | $402.80 | $103.57 | $299.23 | $47,773.85 |
| 24 | $402.80 | $104.21 | $298.59 | $47,669.64 |
| 25 | $402.80 | $104.86 | $297.94 | $47,564.78 |
| 26 | $402.80 | $105.52 | $297.28 | $47,459.26 |
| 27 | $402.80 | $106.18 | $296.62 | $47,353.08 |
| 28 | $402.80 | $106.84 | $295.96 | $47,246.24 |
| 29 | $402.80 | $107.51 | $295.29 | $47,138.73 |
| 30 | $402.80 | $108.18 | $294.62 | $47,030.55 |
| 31 | $402.80 | $108.86 | $293.94 | $46,921.69 |
| 32 | $402.80 | $109.54 | $293.26 | $46,812.15 |
| 33 | $402.80 | $110.22 | $292.58 | $46,701.93 |
| 34 | $402.80 | $110.91 | $291.89 | $46,591.02 |
| 35 | $402.80 | $111.61 | $291.19 | $46,479.41 |
| 36 | $402.80 | $112.30 | $290.50 | $46,367.11 |
| 37 | $402.80 | $113.01 | $289.79 | $46,254.10 |
| 38 | $402.80 | $113.71 | $289.09 | $46,140.39 |
| 39 | $402.80 | $114.42 | $288.38 | $46,025.97 |
| 40 | $402.80 | $115.14 | $287.66 | $45,910.83 |
| 41 | $402.80 | $115.86 | $286.94 | $45,794.97 |
| 42 | $402.80 | $116.58 | $286.22 | $45,678.39 |
| 43 | $402.80 | $117.31 | $285.49 | $45,561.08 |
| 44 | $402.80 | $118.04 | $284.76 | $45,443.04 |
| 45 | $402.80 | $118.78 | $284.02 | $45,324.26 |
| 46 | $402.80 | $119.52 | $283.28 | $45,204.74 |
| 47 | $402.80 | $120.27 | $282.53 | $45,084.47 |
| 48 | $402.80 | $121.02 | $281.78 | $44,963.45 |
| 49 | $402.80 | $121.78 | $281.02 | $44,841.67 |
| 50 | $402.80 | $122.54 | $280.26 | $44,719.13 |
| 51 | $402.80 | $123.31 | $279.49 | $44,595.82 |
| 52 | $402.80 | $124.08 | $278.72 | $44,471.74 |
| 53 | $402.80 | $124.85 | $277.95 | $44,346.89 |
| 54 | $402.80 | $125.63 | $277.17 | $44,221.26 |
| 55 | $402.80 | $126.42 | $276.38 | $44,094.84 |
| 56 | $402.80 | $127.21 | $275.59 | $43,967.63 |
| 57 | $402.80 | $128.00 | $274.80 | $43,839.63 |
| 58 | $402.80 | $128.80 | $274.00 | $43,710.83 |
| 59 | $402.80 | $129.61 | $273.19 | $43,581.22 |
| 60 | $402.80 | $130.42 | $272.38 | $43,450.80 |
| 61 | $402.80 | $131.23 | $271.57 | $43,319.57 |
| 62 | $402.80 | $132.05 | $270.75 | $43,187.52 |
| 63 | $402.80 | $132.88 | $269.92 | $43,054.64 |
| 64 | $402.80 | $133.71 | $269.09 | $42,920.93 |
| 65 | $402.80 | $134.54 | $268.26 | $42,786.39 |
| 66 | $402.80 | $135.39 | $267.41 | $42,651.00 |
| 67 | $402.80 | $136.23 | $266.57 | $42,514.77 |
| 68 | $402.80 | $137.08 | $265.72 | $42,377.69 |
| 69 | $402.80 | $137.94 | $264.86 | $42,239.75 |
| 70 | $402.80 | $138.80 | $264.00 | $42,100.95 |
| 71 | $402.80 | $139.67 | $263.13 | $41,961.28 |
| 72 | $402.80 | $140.54 | $262.26 | $41,820.74 |
| 73 | $402.80 | $141.42 | $261.38 | $41,679.32 |
| 74 | $402.80 | $142.30 | $260.50 | $41,537.02 |
| 75 | $402.80 | $143.19 | $259.61 | $41,393.83 |
| 76 | $402.80 | $144.09 | $258.71 | $41,249.74 |
| 77 | $402.80 | $144.99 | $257.81 | $41,104.75 |
| 78 | $402.80 | $145.90 | $256.90 | $40,958.85 |
| 79 | $402.80 | $146.81 | $255.99 | $40,812.04 |
| 80 | $402.80 | $147.72 | $255.08 | $40,664.32 |
| 81 | $402.80 | $148.65 | $254.15 | $40,515.67 |
| 82 | $402.80 | $149.58 | $253.22 | $40,366.09 |
| 83 | $402.80 | $150.51 | $252.29 | $40,215.58 |
| 84 | $402.80 | $151.45 | $251.35 | $40,064.13 |
| 85 | $402.80 | $152.40 | $250.40 | $39,911.73 |
| 86 | $402.80 | $153.35 | $249.45 | $39,758.38 |
| 87 | $402.80 | $154.31 | $248.49 | $39,604.07 |
| 88 | $402.80 | $155.27 | $247.53 | $39,448.80 |
| 89 | $402.80 | $156.24 | $246.56 | $39,292.56 |
| 90 | $402.80 | $157.22 | $245.58 | $39,135.34 |
| 91 | $402.80 | $158.20 | $244.60 | $38,977.14 |
| 92 | $402.80 | $159.19 | $243.61 | $38,817.95 |
| 93 | $402.80 | $160.19 | $242.61 | $38,657.76 |
| 94 | $402.80 | $161.19 | $241.61 | $38,496.57 |
| 95 | $402.80 | $162.20 | $240.60 | $38,334.37 |
| 96 | $402.80 | $163.21 | $239.59 | $38,171.16 |
| 97 | $402.80 | $164.23 | $238.57 | $38,006.93 |
| 98 | $402.80 | $165.26 | $237.54 | $37,841.67 |
| 99 | $402.80 | $166.29 | $236.51 | $37,675.38 |
| 100 | $402.80 | $167.33 | $235.47 | $37,508.05 |
| 101 | $402.80 | $168.37 | $234.43 | $37,339.68 |
| 102 | $402.80 | $169.43 | $233.37 | $37,170.25 |
| 103 | $402.80 | $170.49 | $232.31 | $36,999.76 |
| 104 | $402.80 | $171.55 | $231.25 | $36,828.21 |
| 105 | $402.80 | $172.62 | $230.18 | $36,655.59 |
| 106 | $402.80 | $173.70 | $229.10 | $36,481.89 |
| 107 | $402.80 | $174.79 | $228.01 | $36,307.10 |
| 108 | $402.80 | $175.88 | $226.92 | $36,131.22 |
| 109 | $402.80 | $176.98 | $225.82 | $35,954.24 |
| 110 | $402.80 | $178.09 | $224.71 | $35,776.15 |
| 111 | $402.80 | $179.20 | $223.60 | $35,596.95 |
| 112 | $402.80 | $180.32 | $222.48 | $35,416.63 |
| 113 | $402.80 | $181.45 | $221.35 | $35,235.18 |
| 114 | $402.80 | $182.58 | $220.22 | $35,052.60 |
| 115 | $402.80 | $183.72 | $219.08 | $34,868.88 |
| 116 | $402.80 | $184.87 | $217.93 | $34,684.01 |
| 117 | $402.80 | $186.02 | $216.78 | $34,497.99 |
| 118 | $402.80 | $187.19 | $215.61 | $34,310.80 |
| 119 | $402.80 | $188.36 | $214.44 | $34,122.44 |
| 120 | $402.80 | $189.53 | $213.27 | $33,932.91 |
| 121 | $402.80 | $190.72 | $212.08 | $33,742.19 |
| 122 | $402.80 | $191.91 | $210.89 | $33,550.28 |
| 123 | $402.80 | $193.11 | $209.69 | $33,357.17 |
| 124 | $402.80 | $194.32 | $208.48 | $33,162.85 |
| 125 | $402.80 | $195.53 | $207.27 | $32,967.32 |
| 126 | $402.80 | $196.75 | $206.05 | $32,770.57 |
| 127 | $402.80 | $197.98 | $204.82 | $32,572.59 |
| 128 | $402.80 | $199.22 | $203.58 | $32,373.37 |
| 129 | $402.80 | $200.47 | $202.33 | $32,172.90 |
| 130 | $402.80 | $201.72 | $201.08 | $31,971.18 |
| 131 | $402.80 | $202.98 | $199.82 | $31,768.20 |
| 132 | $402.80 | $204.25 | $198.55 | $31,563.95 |
| 133 | $402.80 | $205.53 | $197.27 | $31,358.42 |
| 134 | $402.80 | $206.81 | $195.99 | $31,151.61 |
| 135 | $402.80 | $208.10 | $194.70 | $30,943.51 |
| 136 | $402.80 | $209.40 | $193.40 | $30,734.11 |
| 137 | $402.80 | $210.71 | $192.09 | $30,523.40 |
| 138 | $402.80 | $212.03 | $190.77 | $30,311.37 |
| 139 | $402.80 | $213.35 | $189.45 | $30,098.02 |
| 140 | $402.80 | $214.69 | $188.11 | $29,883.33 |
| 141 | $402.80 | $216.03 | $186.77 | $29,667.30 |
| 142 | $402.80 | $217.38 | $185.42 | $29,449.92 |
| 143 | $402.80 | $218.74 | $184.06 | $29,231.18 |
| 144 | $402.80 | $220.11 | $182.69 | $29,011.07 |
| 145 | $402.80 | $221.48 | $181.32 | $28,789.59 |
| 146 | $402.80 | $222.87 | $179.93 | $28,566.72 |
| 147 | $402.80 | $224.26 | $178.54 | $28,342.46 |
| 148 | $402.80 | $225.66 | $177.14 | $28,116.80 |
| 149 | $402.80 | $227.07 | $175.73 | $27,889.73 |
| 150 | $402.80 | $228.49 | $174.31 | $27,661.24 |
| 151 | $402.80 | $229.92 | $172.88 | $27,431.32 |
| 152 | $402.80 | $231.35 | $171.45 | $27,199.97 |
| 153 | $402.80 | $232.80 | $170.00 | $26,967.17 |
| 154 | $402.80 | $234.26 | $168.54 | $26,732.91 |
| 155 | $402.80 | $235.72 | $167.08 | $26,497.19 |
| 156 | $402.80 | $237.19 | $165.61 | $26,260.00 |
| 157 | $402.80 | $238.67 | $164.13 | $26,021.33 |
| 158 | $402.80 | $240.17 | $162.63 | $25,781.16 |
| 159 | $402.80 | $241.67 | $161.13 | $25,539.49 |
| 160 | $402.80 | $243.18 | $159.62 | $25,296.31 |
| 161 | $402.80 | $244.70 | $158.10 | $25,051.61 |
| 162 | $402.80 | $246.23 | $156.57 | $24,805.38 |
| 163 | $402.80 | $247.77 | $155.03 | $24,557.61 |
| 164 | $402.80 | $249.31 | $153.49 | $24,308.30 |
| 165 | $402.80 | $250.87 | $151.93 | $24,057.43 |
| 166 | $402.80 | $252.44 | $150.36 | $23,804.99 |
| 167 | $402.80 | $254.02 | $148.78 | $23,550.97 |
| 168 | $402.80 | $255.61 | $147.19 | $23,295.36 |
| 169 | $402.80 | $257.20 | $145.60 | $23,038.16 |
| 170 | $402.80 | $258.81 | $143.99 | $22,779.35 |
| 171 | $402.80 | $260.43 | $142.37 | $22,518.92 |
| 172 | $402.80 | $262.06 | $140.74 | $22,256.86 |
| 173 | $402.80 | $263.69 | $139.11 | $21,993.17 |
| 174 | $402.80 | $265.34 | $137.46 | $21,727.83 |
| 175 | $402.80 | $267.00 | $135.80 | $21,460.83 |
| 176 | $402.80 | $268.67 | $134.13 | $21,192.16 |
| 177 | $402.80 | $270.35 | $132.45 | $20,921.81 |
| 178 | $402.80 | $272.04 | $130.76 | $20,649.77 |
| 179 | $402.80 | $273.74 | $129.06 | $20,376.03 |
| 180 | $402.80 | $275.45 | $127.35 | $20,100.58 |
| 181 | $402.80 | $277.17 | $125.63 | $19,823.41 |
| 182 | $402.80 | $278.90 | $123.90 | $19,544.51 |
| 183 | $402.80 | $280.65 | $122.15 | $19,263.86 |
| 184 | $402.80 | $282.40 | $120.40 | $18,981.46 |
| 185 | $402.80 | $284.17 | $118.63 | $18,697.29 |
| 186 | $402.80 | $285.94 | $116.86 | $18,411.35 |
| 187 | $402.80 | $287.73 | $115.07 | $18,123.62 |
| 188 | $402.80 | $289.53 | $113.27 | $17,834.09 |
| 189 | $402.80 | $291.34 | $111.46 | $17,542.75 |
| 190 | $402.80 | $293.16 | $109.64 | $17,249.59 |
| 191 | $402.80 | $294.99 | $107.81 | $16,954.60 |
| 192 | $402.80 | $296.83 | $105.97 | $16,657.77 |
| 193 | $402.80 | $298.69 | $104.11 | $16,359.08 |
| 194 | $402.80 | $300.56 | $102.24 | $16,058.52 |
| 195 | $402.80 | $302.43 | $100.37 | $15,756.09 |
| 196 | $402.80 | $304.32 | $98.48 | $15,451.77 |
| 197 | $402.80 | $306.23 | $96.57 | $15,145.54 |
| 198 | $402.80 | $308.14 | $94.66 | $14,837.40 |
| 199 | $402.80 | $310.07 | $92.73 | $14,527.33 |
| 200 | $402.80 | $312.00 | $90.80 | $14,215.33 |
| 201 | $402.80 | $313.95 | $88.85 | $13,901.38 |
| 202 | $402.80 | $315.92 | $86.88 | $13,585.46 |
| 203 | $402.80 | $317.89 | $84.91 | $13,267.57 |
| 204 | $402.80 | $319.88 | $82.92 | $12,947.69 |
| 205 | $402.80 | $321.88 | $80.92 | $12,625.81 |
| 206 | $402.80 | $323.89 | $78.91 | $12,301.92 |
| 207 | $402.80 | $325.91 | $76.89 | $11,976.01 |
| 208 | $402.80 | $327.95 | $74.85 | $11,648.06 |
| 209 | $402.80 | $330.00 | $72.80 | $11,318.06 |
| 210 | $402.80 | $332.06 | $70.74 | $10,986.00 |
| 211 | $402.80 | $334.14 | $68.66 | $10,651.86 |
| 212 | $402.80 | $336.23 | $66.57 | $10,315.63 |
| 213 | $402.80 | $338.33 | $64.47 | $9,977.30 |
| 214 | $402.80 | $340.44 | $62.36 | $9,636.86 |
| 215 | $402.80 | $342.57 | $60.23 | $9,294.29 |
| 216 | $402.80 | $344.71 | $58.09 | $8,949.58 |
| 217 | $402.80 | $346.87 | $55.93 | $8,602.71 |
| 218 | $402.80 | $349.03 | $53.77 | $8,253.68 |
| 219 | $402.80 | $351.21 | $51.59 | $7,902.47 |
| 220 | $402.80 | $353.41 | $49.39 | $7,549.06 |
| 221 | $402.80 | $355.62 | $47.18 | $7,193.44 |
| 222 | $402.80 | $357.84 | $44.96 | $6,835.60 |
| 223 | $402.80 | $360.08 | $42.72 | $6,475.52 |
| 224 | $402.80 | $362.33 | $40.47 | $6,113.19 |
| 225 | $402.80 | $364.59 | $38.21 | $5,748.60 |
| 226 | $402.80 | $366.87 | $35.93 | $5,381.73 |
| 227 | $402.80 | $369.16 | $33.64 | $5,012.57 |
| 228 | $402.80 | $371.47 | $31.33 | $4,641.10 |
| 229 | $402.80 | $373.79 | $29.01 | $4,267.31 |
| 230 | $402.80 | $376.13 | $26.67 | $3,891.18 |
| 231 | $402.80 | $378.48 | $24.32 | $3,512.70 |
| 232 | $402.80 | $380.85 | $21.95 | $3,131.85 |
| 233 | $402.80 | $383.23 | $19.57 | $2,748.62 |
| 234 | $402.80 | $385.62 | $17.18 | $2,363.00 |
| 235 | $402.80 | $388.03 | $14.77 | $1,974.97 |
| 236 | $402.80 | $390.46 | $12.34 | $1,584.51 |
| 237 | $402.80 | $392.90 | $9.90 | $1,191.61 |
| 238 | $402.80 | $395.35 | $7.45 | $796.26 |
| 239 | $402.80 | $397.82 | $4.98 | $398.44 |
| 240 | $400.93 | $398.44 | $2.49 | $0.00 |
How to use the HELOC calculator
- Enter your home's current value and the balance on your mortgage.
- Enter the lender's maximum combined loan-to-value (CLTV) – 85% is typical.
- Enter how much you plan to borrow, the rate, and the draw and repayment periods.
The formulas
Maximum credit line = Home value × CLTV limit − Mortgage balance
Interest-only payment = Balance × Rate ÷ 12
Repayment payment = B × r(1+r)n ÷ ((1+r)n − 1)
where r is the monthly rate and n is the number of repayment months.
Worked example
Your home is worth $450,000 and you owe $250,000. At an 85% CLTV limit the lender allows $382,500 of total debt, so your line can be up to $132,500. If you borrow $50,000 at 7.5%:
- Draw period (10 years): $50,000 × 7.5% ÷ 12 = $312.50 a month, interest only
- Repayment period (20 years): $402.80 a month of principal and interest
Total interest is $37,500 during the draw period plus $46,670.13 during repayment.
Typical HELOC terms
| Feature | Typical range |
|---|---|
| Maximum CLTV | 80% – 90% |
| Draw period | 5 – 10 years |
| Repayment period | 10 – 20 years |
| Interest rate | Prime rate + 0% – 2% (variable) |
| Minimum credit score | 620 – 680 |
Tips
- Budget for the repayment-period payment, not just the interest-only payment.
- Paying principal during the draw period cuts total interest and the later payment jump.
- Ask about rate caps, annual fees and early-closure fees before you sign.
Estimates for educational purposes, not financial advice.
Frequently asked questions
How much can I borrow with a HELOC?
Lenders cap your combined loan-to-value (CLTV), typically at 80–90%. Multiply your home value by the limit and subtract your mortgage balance: $450,000 × 85% − $250,000 = $132,500.
How is a HELOC payment calculated?
During the draw period most HELOCs require interest only: balance × annual rate ÷ 12. When the repayment period starts the balance is amortized like a loan, so the payment covers principal and interest and usually rises sharply.
How long are HELOC draw and repayment periods?
A common structure is a 10-year draw period followed by a 20-year repayment period, but 5–10-year draws and 10–20-year repayments are all common. Some lenders require a balloon payment instead.
Is HELOC interest tax-deductible?
Only if the money is used to buy, build or substantially improve the home that secures it, and within the mortgage-interest limits. Interest on a HELOC used for other purposes is not deductible.
What is the difference between a HELOC and a home equity loan?
A HELOC is a revolving line with a variable rate that you draw as needed; a home equity loan is a lump sum with a fixed rate and fixed payments from day one.