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Mortgage Calculator UK

Compare UK repayment and interest-only mortgage estimates in pounds, including entered ownership costs and extra repayments.

Calculator currency: GBP

This model uses GBP. Your language and currency preferences do not change its regional rules.

Your inputs

Extra payments & additional assumptions
First payment month

Calculations run in your browser. No account needed.

EXAMPLE RESULTCalculated locally
Initial monthly ownership cost
£2,422.62
Regular monthly payment
£2,022.62
Loan amount
£320,000.00
Total interest
£408,142.36
Total payments
£728,142.36
Payoff time
360 months
Down payment
£80,000.00
Ownership costs during loan
£144,000.00

About this result

Ownership cost excludes extra principal payments. Insurance input stays constant except for the entered growth; mortgage-insurance cancellation is not automatic.

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My workspace

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Loan balance over time

GBP
Balance
079.9K159.9K239.8K319.7K1180360
Payment 360
Balance£0.00

Loan payment breakdown

GBP

Principal and interest over the loan term.

Total£728,142.36
  • Principal£320,000.0043.9%
  • Interest£408,142.3656.1%

Detailed breakdown

All 360 rows

The complete calculation, row by row. Amounts in GBP.

Swipe or scroll horizontally for more columns.
Detailed breakdown · All 360 rows
PaymentMonthPayment amount (GBP)Principal (GBP)Interest (GBP)Balance (GBP)
12026-112,022.62289.281,733.33319,710.72
22026-122,022.62290.851,731.77319,419.86
32027-012,022.62292.431,730.19319,127.44
42027-022,022.62294.011,728.61318,833.43
52027-032,022.62295.601,727.01318,537.82
62027-042,022.62297.201,725.41318,240.62
72027-052,022.62298.811,723.80317,941.80
82027-062,022.62300.431,722.18317,641.37
92027-072,022.62302.061,720.56317,339.31
102027-082,022.62303.701,718.92317,035.62
112027-092,022.62305.341,717.28316,730.27
122027-102,022.62307.001,715.62316,423.28
132027-112,022.62308.661,713.96316,114.62
142027-122,022.62310.331,712.29315,804.29
152028-012,022.62312.011,710.61315,492.28
162028-022,022.62313.701,708.92315,178.58
172028-032,022.62315.401,707.22314,863.18
182028-042,022.62317.111,705.51314,546.07
192028-052,022.62318.831,703.79314,227.24
202028-062,022.62320.551,702.06313,906.69
212028-072,022.62322.291,700.33313,584.40
222028-082,022.62324.041,698.58313,260.36
232028-092,022.62325.791,696.83312,934.57
242028-102,022.62327.561,695.06312,607.02
252028-112,022.62329.331,693.29312,277.69
262028-122,022.62331.111,691.50311,946.57
272029-012,022.62332.911,689.71311,613.67
282029-022,022.62334.711,687.91311,278.96
292029-032,022.62336.521,686.09310,942.43
302029-042,022.62338.351,684.27310,604.09
312029-052,022.62340.181,682.44310,263.91
322029-062,022.62342.021,680.60309,921.89
332029-072,022.62343.871,678.74309,578.01
342029-082,022.62345.741,676.88309,232.28
352029-092,022.62347.611,675.01308,884.67
362029-102,022.62349.491,673.13308,535.17
372029-112,022.62351.391,671.23308,183.79
382029-122,022.62353.291,669.33307,830.50
392030-012,022.62355.201,667.42307,475.30
402030-022,022.62357.131,665.49307,118.17
412030-032,022.62359.061,663.56306,759.11
422030-042,022.62361.011,661.61306,398.10
432030-052,022.62362.961,659.66306,035.14
442030-062,022.62364.931,657.69305,670.22
452030-072,022.62366.901,655.71305,303.31
462030-082,022.62368.891,653.73304,934.42
472030-092,022.62370.891,651.73304,563.53
482030-102,022.62372.901,649.72304,190.63
492030-112,022.62374.921,647.70303,815.71
502030-122,022.62376.951,645.67303,438.76
512031-012,022.62378.991,643.63303,059.77
522031-022,022.62381.041,641.57302,678.73
532031-032,022.62383.111,639.51302,295.62
542031-042,022.62385.181,637.43301,910.44
552031-052,022.62387.271,635.35301,523.17
562031-062,022.62389.371,633.25301,133.80
572031-072,022.62391.481,631.14300,742.33
582031-082,022.62393.601,629.02300,348.73
592031-092,022.62395.731,626.89299,953.00
602031-102,022.62397.871,624.75299,555.13
612031-112,022.62400.031,622.59299,155.10
622031-122,022.62402.191,620.42298,752.91
632032-012,022.62404.371,618.24298,348.53
642032-022,022.62406.561,616.05297,941.97
652032-032,022.62408.771,613.85297,533.20
662032-042,022.62410.981,611.64297,122.23
672032-052,022.62413.211,609.41296,709.02
682032-062,022.62415.441,607.17296,293.58
692032-072,022.62417.691,604.92295,875.88
702032-082,022.62419.961,602.66295,455.93
712032-092,022.62422.231,600.39295,033.69
722032-102,022.62424.521,598.10294,609.18
732032-112,022.62426.821,595.80294,182.36
742032-122,022.62429.131,593.49293,753.23
752033-012,022.62431.451,591.16293,321.77
762033-022,022.62433.791,588.83292,887.98
772033-032,022.62436.141,586.48292,451.84
782033-042,022.62438.501,584.11292,013.34
792033-052,022.62440.881,581.74291,572.46
802033-062,022.62443.271,579.35291,129.19
812033-072,022.62445.671,576.95290,683.52
822033-082,022.62448.081,574.54290,235.44
832033-092,022.62450.511,572.11289,784.93
842033-102,022.62452.951,569.67289,331.98
852033-112,022.62455.401,567.21288,876.58
862033-122,022.62457.871,564.75288,418.71
872034-012,022.62460.351,562.27287,958.36
882034-022,022.62462.841,559.77287,495.52
892034-032,022.62465.351,557.27287,030.17
902034-042,022.62467.871,554.75286,562.30
912034-052,022.62470.411,552.21286,091.89
922034-062,022.62472.951,549.66285,618.94
932034-072,022.62475.521,547.10285,143.42
942034-082,022.62478.091,544.53284,665.33
952034-092,022.62480.681,541.94284,184.65
962034-102,022.62483.281,539.33283,701.37
972034-112,022.62485.901,536.72283,215.47
982034-122,022.62488.531,534.08282,726.93
992035-012,022.62491.181,531.44282,235.75
1002035-022,022.62493.841,528.78281,741.91
1012035-032,022.62496.521,526.10281,245.40
1022035-042,022.62499.211,523.41280,746.19
1032035-052,022.62501.911,520.71280,244.28
1042035-062,022.62504.631,517.99279,739.65
1052035-072,022.62507.361,515.26279,232.29
1062035-082,022.62510.111,512.51278,722.18
1072035-092,022.62512.871,509.75278,209.31
1082035-102,022.62515.651,506.97277,693.66
1092035-112,022.62518.441,504.17277,175.22
1102035-122,022.62521.251,501.37276,653.96
1112036-012,022.62524.081,498.54276,129.89
1122036-022,022.62526.911,495.70275,602.97
1132036-032,022.62529.771,492.85275,073.21
1142036-042,022.62532.641,489.98274,540.57
1152036-052,022.62535.521,487.09274,005.05
1162036-062,022.62538.421,484.19273,466.62
1172036-072,022.62541.341,481.28272,925.28
1182036-082,022.62544.271,478.35272,381.01
1192036-092,022.62547.221,475.40271,833.79
1202036-102,022.62550.181,472.43271,283.60
1212036-112,022.62553.161,469.45270,730.44
1222036-122,022.62556.161,466.46270,174.28
1232037-012,022.62559.171,463.44269,615.10
1242037-022,022.62562.201,460.42269,052.90
1252037-032,022.62565.251,457.37268,487.65
1262037-042,022.62568.311,454.31267,919.34
1272037-052,022.62571.391,451.23267,347.96
1282037-062,022.62574.481,448.13266,773.47
1292037-072,022.62577.591,445.02266,195.88
1302037-082,022.62580.721,441.89265,615.16
1312037-092,022.62583.871,438.75265,031.29
1322037-102,022.62587.031,435.59264,444.26
1332037-112,022.62590.211,432.41263,854.04
1342037-122,022.62593.411,429.21263,260.64
1352038-012,022.62596.621,426.00262,664.01
1362038-022,022.62599.851,422.76262,064.16
1372038-032,022.62603.101,419.51261,461.06
1382038-042,022.62606.371,416.25260,854.69
1392038-052,022.62609.651,412.96260,245.03
1402038-062,022.62612.961,409.66259,632.07
1412038-072,022.62616.281,406.34259,015.80
1422038-082,022.62619.621,403.00258,396.18
1432038-092,022.62622.971,399.65257,773.21
1442038-102,022.62626.351,396.27257,146.86
1452038-112,022.62629.741,392.88256,517.12
1462038-122,022.62633.151,389.47255,883.97
1472039-012,022.62636.581,386.04255,247.39
1482039-022,022.62640.031,382.59254,607.37
1492039-032,022.62643.491,379.12253,963.87
1502039-042,022.62646.981,375.64253,316.89
1512039-052,022.62650.481,372.13252,666.41
1522039-062,022.62654.011,368.61252,012.40
1532039-072,022.62657.551,365.07251,354.85
1542039-082,022.62661.111,361.51250,693.74
1552039-092,022.62664.691,357.92250,029.04
1562039-102,022.62668.291,354.32249,360.75
1572039-112,022.62671.911,350.70248,688.84
1582039-122,022.62675.551,347.06248,013.28
1592040-012,022.62679.211,343.41247,334.07
1602040-022,022.62682.891,339.73246,651.18
1612040-032,022.62686.591,336.03245,964.59
1622040-042,022.62690.311,332.31245,274.28
1632040-052,022.62694.051,328.57244,580.23
1642040-062,022.62697.811,324.81243,882.42
1652040-072,022.62701.591,321.03243,180.84
1662040-082,022.62705.391,317.23242,475.45
1672040-092,022.62709.211,313.41241,766.24
1682040-102,022.62713.051,309.57241,053.19
1692040-112,022.62716.911,305.70240,336.27
1702040-122,022.62720.801,301.82239,615.48
1712041-012,022.62724.701,297.92238,890.78
1722041-022,022.62728.631,293.99238,162.15
1732041-032,022.62732.571,290.04237,429.58
1742041-042,022.62736.541,286.08236,693.04
1752041-052,022.62740.531,282.09235,952.51
1762041-062,022.62744.541,278.08235,207.97
1772041-072,022.62748.571,274.04234,459.39
1782041-082,022.62752.631,269.99233,706.76
1792041-092,022.62756.711,265.91232,950.06
1802041-102,022.62760.801,261.81232,189.25
1812041-112,022.62764.931,257.69231,424.33
1822041-122,022.62769.071,253.55230,655.26
1832042-012,022.62773.241,249.38229,882.02
1842042-022,022.62777.421,245.19229,104.60
1852042-032,022.62781.631,240.98228,322.96
1862042-042,022.62785.871,236.75227,537.10
1872042-052,022.62790.131,232.49226,746.97
1882042-062,022.62794.401,228.21225,952.57
1892042-072,022.62798.711,223.91225,153.86
1902042-082,022.62803.031,219.58224,350.82
1912042-092,022.62807.381,215.23223,543.44
1922042-102,022.62811.761,210.86222,731.68
1932042-112,022.62816.151,206.46221,915.53
1942042-122,022.62820.581,202.04221,094.95
1952043-012,022.62825.021,197.60220,269.93
1962043-022,022.62829.491,193.13219,440.44
1972043-032,022.62833.981,188.64218,606.46
1982043-042,022.62838.501,184.12217,767.96
1992043-052,022.62843.041,179.58216,924.92
2002043-062,022.62847.611,175.01216,077.31
2012043-072,022.62852.201,170.42215,225.11
2022043-082,022.62856.811,165.80214,368.30
2032043-092,022.62861.461,161.16213,506.84
2042043-102,022.62866.121,156.50212,640.72
2052043-112,022.62870.811,151.80211,769.91
2062043-122,022.62875.531,147.09210,894.38
2072044-012,022.62880.271,142.34210,014.10
2082044-022,022.62885.041,137.58209,129.06
2092044-032,022.62889.841,132.78208,239.23
2102044-042,022.62894.661,127.96207,344.57
2112044-052,022.62899.501,123.12206,445.07
2122044-062,022.62904.371,118.24205,540.70
2132044-072,022.62909.271,113.35204,631.42
2142044-082,022.62914.201,108.42203,717.23
2152044-092,022.62919.151,103.47202,798.08
2162044-102,022.62924.131,098.49201,873.95
2172044-112,022.62929.131,093.48200,944.82
2182044-122,022.62934.171,088.45200,010.65
2192045-012,022.62939.231,083.39199,071.42
2202045-022,022.62944.311,078.30198,127.11
2212045-032,022.62949.431,073.19197,177.68
2222045-042,022.62954.571,068.05196,223.11
2232045-052,022.62959.741,062.88195,263.37
2242045-062,022.62964.941,057.68194,298.42
2252045-072,022.62970.171,052.45193,328.26
2262045-082,022.62975.421,047.19192,352.83
2272045-092,022.62980.711,041.91191,372.13
2282045-102,022.62986.021,036.60190,386.11
2292045-112,022.62991.361,031.26189,394.75
2302045-122,022.62996.731,025.89188,398.02
2312046-012,022.621,002.131,020.49187,395.89
2322046-022,022.621,007.561,015.06186,388.33
2332046-032,022.621,013.011,009.60185,375.32
2342046-042,022.621,018.501,004.12184,356.82
2352046-052,022.621,024.02998.60183,332.80
2362046-062,022.621,029.57993.05182,303.24
2372046-072,022.621,035.14987.48181,268.09
2382046-082,022.621,040.75981.87180,227.34
2392046-092,022.621,046.39976.23179,180.96
2402046-102,022.621,052.05970.56178,128.90
2412046-112,022.621,057.75964.86177,071.15
2422046-122,022.621,063.48959.14176,007.67
2432047-012,022.621,069.24953.37174,938.43
2442047-022,022.621,075.03947.58173,863.39
2452047-032,022.621,080.86941.76172,782.53
2462047-042,022.621,086.71935.91171,695.82
2472047-052,022.621,092.60930.02170,603.22
2482047-062,022.621,098.52924.10169,504.71
2492047-072,022.621,104.47918.15168,400.24
2502047-082,022.621,110.45912.17167,289.79
2512047-092,022.621,116.46906.15166,173.32
2522047-102,022.621,122.51900.11165,050.81
2532047-112,022.621,128.59894.03163,922.22
2542047-122,022.621,134.71887.91162,787.51
2552048-012,022.621,140.85881.77161,646.66
2562048-022,022.621,147.03875.59160,499.63
2572048-032,022.621,153.24869.37159,346.39
2582048-042,022.621,159.49863.13158,186.89
2592048-052,022.621,165.77856.85157,021.12
2602048-062,022.621,172.09850.53155,849.04
2612048-072,022.621,178.44844.18154,670.60
2622048-082,022.621,184.82837.80153,485.78
2632048-092,022.621,191.24831.38152,294.55
2642048-102,022.621,197.69824.93151,096.86
2652048-112,022.621,204.18818.44149,892.68
2662048-122,022.621,210.70811.92148,681.98
2672049-012,022.621,217.26805.36147,464.72
2682049-022,022.621,223.85798.77146,240.87
2692049-032,022.621,230.48792.14145,010.39
2702049-042,022.621,237.14785.47143,773.25
2712049-052,022.621,243.85778.77142,529.40
2722049-062,022.621,250.58772.03141,278.82
2732049-072,022.621,257.36765.26140,021.46
2742049-082,022.621,264.17758.45138,757.30
2752049-092,022.621,271.02751.60137,486.28
2762049-102,022.621,277.90744.72136,208.38
2772049-112,022.621,284.82737.80134,923.56
2782049-122,022.621,291.78730.84133,631.78
2792050-012,022.621,298.78723.84132,333.00
2802050-022,022.621,305.81716.80131,027.18
2812050-032,022.621,312.89709.73129,714.30
2822050-042,022.621,320.00702.62128,394.30
2832050-052,022.621,327.15695.47127,067.15
2842050-062,022.621,334.34688.28125,732.81
2852050-072,022.621,341.56681.05124,391.25
2862050-082,022.621,348.83673.79123,042.41
2872050-092,022.621,356.14666.48121,686.28
2882050-102,022.621,363.48659.13120,322.79
2892050-112,022.621,370.87651.75118,951.92
2902050-122,022.621,378.29644.32117,573.63
2912051-012,022.621,385.76636.86116,187.87
2922051-022,022.621,393.27629.35114,794.60
2932051-032,022.621,400.81621.80113,393.79
2942051-042,022.621,408.40614.22111,985.39
2952051-052,022.621,416.03606.59110,569.36
2962051-062,022.621,423.70598.92109,145.66
2972051-072,022.621,431.41591.21107,714.24
2982051-082,022.621,439.17583.45106,275.08
2992051-092,022.621,446.96575.66104,828.12
3002051-102,022.621,454.80567.82103,373.32
3012051-112,022.621,462.68559.94101,910.64
3022051-122,022.621,470.60552.02100,440.04
3032052-012,022.621,478.57544.0598,961.47
3042052-022,022.621,486.58536.0497,474.89
3052052-032,022.621,494.63527.9995,980.27
3062052-042,022.621,502.72519.8994,477.54
3072052-052,022.621,510.86511.7592,966.68
3082052-062,022.621,519.05503.5791,447.63
3092052-072,022.621,527.28495.3489,920.35
3102052-082,022.621,535.55487.0788,384.80
3112052-092,022.621,543.87478.7586,840.94
3122052-102,022.621,552.23470.3985,288.71
3132052-112,022.621,560.64461.9883,728.07
3142052-122,022.621,569.09453.5382,158.98
3152053-012,022.621,577.59445.0380,581.39
3162053-022,022.621,586.14436.4878,995.25
3172053-032,022.621,594.73427.8977,400.53
3182053-042,022.621,603.36419.2575,797.16
3192053-052,022.621,612.05410.5774,185.11
3202053-062,022.621,620.78401.8472,564.33
3212053-072,022.621,629.56393.0670,934.77
3222053-082,022.621,638.39384.2369,296.38
3232053-092,022.621,647.26375.3667,649.12
3242053-102,022.621,656.18366.4365,992.94
3252053-112,022.621,665.16357.4664,327.78
3262053-122,022.621,674.18348.4462,653.60
3272054-012,022.621,683.24339.3760,970.36
3282054-022,022.621,692.36330.2659,278.00
3292054-032,022.621,701.53321.0957,576.47
3302054-042,022.621,710.75311.8755,865.73
3312054-052,022.621,720.01302.6154,145.71
3322054-062,022.621,729.33293.2952,416.38
3332054-072,022.621,738.70283.9250,677.69
3342054-082,022.621,748.11274.5048,929.58
3352054-092,022.621,757.58265.0447,171.99
3362054-102,022.621,767.10255.5145,404.89
3372054-112,022.621,776.67245.9443,628.22
3382054-122,022.621,786.30236.3241,841.92
3392055-012,022.621,795.97226.6440,045.94
3402055-022,022.621,805.70216.9238,240.24
3412055-032,022.621,815.48207.1336,424.76
3422055-042,022.621,825.32197.3034,599.44
3432055-052,022.621,835.20187.4132,764.24
3442055-062,022.621,845.14177.4730,919.09
3452055-072,022.621,855.14167.4829,063.95
3462055-082,022.621,865.19157.4327,198.77
3472055-092,022.621,875.29147.3325,323.47
3482055-102,022.621,885.45137.1723,438.03
3492055-112,022.621,895.66126.9621,542.36
3502055-122,022.621,905.93116.6919,636.43
3512056-012,022.621,916.25106.3617,720.18
3522056-022,022.621,926.6395.9815,793.55
3532056-032,022.621,937.0785.5513,856.48
3542056-042,022.621,947.5675.0611,908.92
3552056-052,022.621,958.1164.519,950.81
3562056-062,022.621,968.7253.907,982.09
3572056-072,022.621,979.3843.246,002.71
3582056-082,022.621,990.1032.514,012.60
3592056-092,022.622,000.8821.732,011.72
3602056-102,022.622,011.7210.900.00

How it works

A useful distinction

Budget separately for the interest-only balance

An interest-only balance of £240,000 due in 20 years would require £1,000 monthly saving to accumulate without growth. That is additional to interest payments; the low mortgage installment does not fund the final principal repayment.

Repayment and interest-only mortgages

A repayment mortgage gradually reduces the amount owed through scheduled payments. In the interest-only comparison, paying the interest does not by itself repay the original loan. Compare the balance left at the end alongside the monthly payment. A smaller monthly figure can therefore leave a much larger final obligation, and changing the assumed rate changes both comparisons.

For a loan of 250,000 at a constant 5% annual rate, the modeled interest-only payment is 1,041.67 per month and 250,000 remains to repay. Product fees, early repayment charges, purchase taxes and future rate changes are excluded unless explicitly entered in a supported field.

UK mortgage: formula and assumptions

Loan = price × (1−down payment%). Monthly payment = Pr/[1−(1+r)^−n].

The schedule assumes a fixed interest rate over the entered amortization period. Ownership costs are tracked separately from loan principal and interest.

Interest-only comparison: formula and assumptions

Monthly interest=principal×annual rate/12. The principal remains due at the end.

This model assumes a constant rate and balance. It does not include a repayment investment or guarantee that the final balance will be affordable.

Worked example

Reference example currency: GBP. These fixed examples do not change with your calculator preferences.

Using the UK mortgage example:

Inputs
Home price (£)
400000
Down payment (%)
20
Annual interest rate (%)
6.5
Term (years)
30
Annual property tax (£)
3600
Annual home insurance (£)
1200
Monthly mortgage insurance (£)
0
Monthly HOA fees (£)
0
Other monthly ownership costs (£)
0
Annual tax increase (%)
0
Annual insurance increase (%)
0
Annual HOA increase (%)
0
Extra monthly principal (£)
0
Extra annual principal (£)
0
One-time extra principal (£)
0
One-time payment month
12
First payment month
2026-11-01
Method

Loan = price × (1−down payment%). Monthly payment = Pr/[1−(1+r)^−n].

Result

Example result

Initial monthly ownership cost: £2,422.62

Regular monthly payment: £2,022.62

Loan amount: £320,000.00

Total interest: £408,142.36

Total payments: £728,142.36

Payoff time: 360 months

Down payment: £80,000.00

Ownership costs during loan: £144,000.00

  • Ownership cost excludes extra principal payments. Insurance input stays constant except for the entered growth; mortgage-insurance cancellation is not automatic.

These are illustrative inputs. Change the values to explore a different scenario.

What to keep in mind

This is an estimate, not a loan offer. Taxes, insurance, mortgage-insurance cancellation, renewal terms, and fees depend on your agreement.

Formula references

References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.

Common questions

What happens to the balance on an interest-only mortgage?

Monthly interest payments do not repay principal. The original balance remains due unless you arrange and make separate capital repayments.

Does the UK estimate include every purchase cost?

No. Use the fields for costs the model supports; stamp duty, product fees and lender-specific conditions are not automatically determined.

Prepared by Finflo. See our methodology and editorial policy. Read the relevant professional-advice limitations.