OneLifeAppsNZ
← Back to Money & Financial Decisions
MONEY & FINANCIAL DECISIONS

Loan & Mortgage

Understand repayments, interest and the effect of paying a little extra.

All amounts NZD · Examples are editable · Entries stay in this browser session and are not saved

Loan details

Base monthly repayment$3,350.37
Amount borrowed$520,000
Base total interest$485,110
Base total repaid$1,005,110
Interest saved with extra$36,200

With the extra repayment: $3,450 monthly (final payment may be smaller), $448,910 total interest and $968,910 total repaid.

Estimated payoff in 23.4 years — around March 2050. Saves 1 years and 7 months.

Remaining loan balance
View chart values
YearBase loanWith extra repayments
0$520,000$520,000
1$510,744$509,510
2$500,917$498,373
3$490,483$486,550
4$479,407$473,997
5$467,647$460,670
6$455,162$446,521
7$441,906$431,499
8$427,833$415,551
9$412,893$398,619
10$397,030$380,642
11$380,190$361,557
12$362,310$341,295
13$343,328$319,783
14$323,175$296,945
15$301,779$272,697
16$279,064$246,954
17$254,947$219,624
18$229,343$190,608
19$202,160$159,802
20$173,300$127,096
21$142,660$92,372
22$110,130$55,507
23$75,594$16,369
24$38,928$0
25$0$0

Could you manage a higher interest rate?

ScenarioResultChange from baseline
6% (current)$3,350 monthly$0
7%$3,675 monthly+$325
8%$4,013 monthly+$663
9%$4,364 monthly+$1,013

Same principal and term, excluding extra repayments. Rates change independently from your baseline.

Full repayment schedule — including extra payments
PaymentOpeningRepaymentInterestPrincipalClosing
1$520,000.00$3,450.37$2,600.00$850.37$519,149.63
2$519,149.63$3,450.37$2,595.75$854.62$518,295.01
3$518,295.01$3,450.37$2,591.48$858.89$517,436.12
4$517,436.12$3,450.37$2,587.18$863.19$516,572.93
5$516,572.93$3,450.37$2,582.86$867.50$515,705.43
6$515,705.43$3,450.37$2,578.53$871.84$514,833.59
7$514,833.59$3,450.37$2,574.17$876.20$513,957.39
8$513,957.39$3,450.37$2,569.79$880.58$513,076.81
9$513,076.81$3,450.37$2,565.38$884.98$512,191.83
10$512,191.83$3,450.37$2,560.96$889.41$511,302.42
11$511,302.42$3,450.37$2,556.51$893.86$510,408.57
12$510,408.57$3,450.37$2,552.04$898.32$509,510.24
13$509,510.24$3,450.37$2,547.55$902.82$508,607.43
14$508,607.43$3,450.37$2,543.04$907.33$507,700.10
15$507,700.10$3,450.37$2,538.50$911.87$506,788.23
16$506,788.23$3,450.37$2,533.94$916.43$505,871.80
17$505,871.80$3,450.37$2,529.36$921.01$504,950.79
18$504,950.79$3,450.37$2,524.75$925.61$504,025.18
19$504,025.18$3,450.37$2,520.13$930.24$503,094.94
20$503,094.94$3,450.37$2,515.47$934.89$502,160.05
21$502,160.05$3,450.37$2,510.80$939.57$501,220.48
22$501,220.48$3,450.37$2,506.10$944.26$500,276.21
23$500,276.21$3,450.37$2,501.38$948.99$499,327.23
24$499,327.23$3,450.37$2,496.64$953.73$498,373.50
25$498,373.50$3,450.37$2,491.87$958.50$497,415.00
26$497,415.00$3,450.37$2,487.07$963.29$496,451.71
27$496,451.71$3,450.37$2,482.26$968.11$495,483.60
28$495,483.60$3,450.37$2,477.42$972.95$494,510.65
29$494,510.65$3,450.37$2,472.55$977.81$493,532.83
30$493,532.83$3,450.37$2,467.66$982.70$492,550.13
31$492,550.13$3,450.37$2,462.75$987.62$491,562.51
32$491,562.51$3,450.37$2,457.81$992.55$490,569.96
33$490,569.96$3,450.37$2,452.85$997.52$489,572.44
34$489,572.44$3,450.37$2,447.86$1,002.51$488,569.94
35$488,569.94$3,450.37$2,442.85$1,007.52$487,562.42
36$487,562.42$3,450.37$2,437.81$1,012.56$486,549.86
37$486,549.86$3,450.37$2,432.75$1,017.62$485,532.25
38$485,532.25$3,450.37$2,427.66$1,022.71$484,509.54
39$484,509.54$3,450.37$2,422.55$1,027.82$483,481.72
40$483,481.72$3,450.37$2,417.41$1,032.96$482,448.76
41$482,448.76$3,450.37$2,412.24$1,038.12$481,410.64
42$481,410.64$3,450.37$2,407.05$1,043.31$480,367.32
43$480,367.32$3,450.37$2,401.84$1,048.53$479,318.79
44$479,318.79$3,450.37$2,396.59$1,053.77$478,265.02
45$478,265.02$3,450.37$2,391.33$1,059.04$477,205.98
46$477,205.98$3,450.37$2,386.03$1,064.34$476,141.64
47$476,141.64$3,450.37$2,380.71$1,069.66$475,071.98
48$475,071.98$3,450.37$2,375.36$1,075.01$473,996.97
49$473,996.97$3,450.37$2,369.98$1,080.38$472,916.59
50$472,916.59$3,450.37$2,364.58$1,085.78$471,830.81
51$471,830.81$3,450.37$2,359.15$1,091.21$470,739.59
52$470,739.59$3,450.37$2,353.70$1,096.67$469,642.92
53$469,642.92$3,450.37$2,348.21$1,102.15$468,540.77
54$468,540.77$3,450.37$2,342.70$1,107.66$467,433.11
55$467,433.11$3,450.37$2,337.17$1,113.20$466,319.91
56$466,319.91$3,450.37$2,331.60$1,118.77$465,201.14
57$465,201.14$3,450.37$2,326.01$1,124.36$464,076.78
58$464,076.78$3,450.37$2,320.38$1,129.98$462,946.79
59$462,946.79$3,450.37$2,314.73$1,135.63$461,811.16
60$461,811.16$3,450.37$2,309.06$1,141.31$460,669.85
61$460,669.85$3,450.37$2,303.35$1,147.02$459,522.83
62$459,522.83$3,450.37$2,297.61$1,152.75$458,370.08
63$458,370.08$3,450.37$2,291.85$1,158.52$457,211.56
64$457,211.56$3,450.37$2,286.06$1,164.31$456,047.25
65$456,047.25$3,450.37$2,280.24$1,170.13$454,877.12
66$454,877.12$3,450.37$2,274.39$1,175.98$453,701.14
67$453,701.14$3,450.37$2,268.51$1,181.86$452,519.28
68$452,519.28$3,450.37$2,262.60$1,187.77$451,331.51
69$451,331.51$3,450.37$2,256.66$1,193.71$450,137.80
70$450,137.80$3,450.37$2,250.69$1,199.68$448,938.12
71$448,938.12$3,450.37$2,244.69$1,205.68$447,732.44
72$447,732.44$3,450.37$2,238.66$1,211.71$446,520.74
73$446,520.74$3,450.37$2,232.60$1,217.76$445,302.97
74$445,302.97$3,450.37$2,226.51$1,223.85$444,079.12
75$444,079.12$3,450.37$2,220.40$1,229.97$442,849.15
76$442,849.15$3,450.37$2,214.25$1,236.12$441,613.03
77$441,613.03$3,450.37$2,208.07$1,242.30$440,370.72
78$440,370.72$3,450.37$2,201.85$1,248.51$439,122.21
79$439,122.21$3,450.37$2,195.61$1,254.76$437,867.45
80$437,867.45$3,450.37$2,189.34$1,261.03$436,606.42
81$436,606.42$3,450.37$2,183.03$1,267.34$435,339.09
82$435,339.09$3,450.37$2,176.70$1,273.67$434,065.42
83$434,065.42$3,450.37$2,170.33$1,280.04$432,785.38
84$432,785.38$3,450.37$2,163.93$1,286.44$431,498.94
85$431,498.94$3,450.37$2,157.49$1,292.87$430,206.06
86$430,206.06$3,450.37$2,151.03$1,299.34$428,906.73
87$428,906.73$3,450.37$2,144.53$1,305.83$427,600.89
88$427,600.89$3,450.37$2,138.00$1,312.36$426,288.53
89$426,288.53$3,450.37$2,131.44$1,318.92$424,969.61
90$424,969.61$3,450.37$2,124.85$1,325.52$423,644.09
91$423,644.09$3,450.37$2,118.22$1,332.15$422,311.94
92$422,311.94$3,450.37$2,111.56$1,338.81$420,973.13
93$420,973.13$3,450.37$2,104.87$1,345.50$419,627.63
94$419,627.63$3,450.37$2,098.14$1,352.23$418,275.40
95$418,275.40$3,450.37$2,091.38$1,358.99$416,916.41
96$416,916.41$3,450.37$2,084.58$1,365.79$415,550.63
97$415,550.63$3,450.37$2,077.75$1,372.61$414,178.01
98$414,178.01$3,450.37$2,070.89$1,379.48$412,798.53
99$412,798.53$3,450.37$2,063.99$1,386.37$411,412.16
100$411,412.16$3,450.37$2,057.06$1,393.31$410,018.85
101$410,018.85$3,450.37$2,050.09$1,400.27$408,618.58
102$408,618.58$3,450.37$2,043.09$1,407.27$407,211.31
103$407,211.31$3,450.37$2,036.06$1,414.31$405,797.00
104$405,797.00$3,450.37$2,028.98$1,421.38$404,375.61
105$404,375.61$3,450.37$2,021.88$1,428.49$402,947.12
106$402,947.12$3,450.37$2,014.74$1,435.63$401,511.49
107$401,511.49$3,450.37$2,007.56$1,442.81$400,068.68
108$400,068.68$3,450.37$2,000.34$1,450.02$398,618.66
109$398,618.66$3,450.37$1,993.09$1,457.27$397,161.38
110$397,161.38$3,450.37$1,985.81$1,464.56$395,696.82
111$395,696.82$3,450.37$1,978.48$1,471.88$394,224.94
112$394,224.94$3,450.37$1,971.12$1,479.24$392,745.70
113$392,745.70$3,450.37$1,963.73$1,486.64$391,259.06
114$391,259.06$3,450.37$1,956.30$1,494.07$389,764.99
115$389,764.99$3,450.37$1,948.82$1,501.54$388,263.45
116$388,263.45$3,450.37$1,941.32$1,509.05$386,754.40
117$386,754.40$3,450.37$1,933.77$1,516.60$385,237.80
118$385,237.80$3,450.37$1,926.19$1,524.18$383,713.62
119$383,713.62$3,450.37$1,918.57$1,531.80$382,181.82
120$382,181.82$3,450.37$1,910.91$1,539.46$380,642.36
121$380,642.36$3,450.37$1,903.21$1,547.16$379,095.21
122$379,095.21$3,450.37$1,895.48$1,554.89$377,540.32
123$377,540.32$3,450.37$1,887.70$1,562.67$375,977.65
124$375,977.65$3,450.37$1,879.89$1,570.48$374,407.17
125$374,407.17$3,450.37$1,872.04$1,578.33$372,828.84
126$372,828.84$3,450.37$1,864.14$1,586.22$371,242.62
127$371,242.62$3,450.37$1,856.21$1,594.15$369,648.46
128$369,648.46$3,450.37$1,848.24$1,602.12$368,046.34
129$368,046.34$3,450.37$1,840.23$1,610.14$366,436.20
130$366,436.20$3,450.37$1,832.18$1,618.19$364,818.02
131$364,818.02$3,450.37$1,824.09$1,626.28$363,191.74
132$363,191.74$3,450.37$1,815.96$1,634.41$361,557.33
133$361,557.33$3,450.37$1,807.79$1,642.58$359,914.75
134$359,914.75$3,450.37$1,799.57$1,650.79$358,263.96
135$358,263.96$3,450.37$1,791.32$1,659.05$356,604.91
136$356,604.91$3,450.37$1,783.02$1,667.34$354,937.57
137$354,937.57$3,450.37$1,774.69$1,675.68$353,261.89
138$353,261.89$3,450.37$1,766.31$1,684.06$351,577.83
139$351,577.83$3,450.37$1,757.89$1,692.48$349,885.35
140$349,885.35$3,450.37$1,749.43$1,700.94$348,184.41
141$348,184.41$3,450.37$1,740.92$1,709.45$346,474.97
142$346,474.97$3,450.37$1,732.37$1,717.99$344,756.97
143$344,756.97$3,450.37$1,723.78$1,726.58$343,030.39
144$343,030.39$3,450.37$1,715.15$1,735.22$341,295.18
145$341,295.18$3,450.37$1,706.48$1,743.89$339,551.28
146$339,551.28$3,450.37$1,697.76$1,752.61$337,798.67
147$337,798.67$3,450.37$1,688.99$1,761.37$336,037.30
148$336,037.30$3,450.37$1,680.19$1,770.18$334,267.12
149$334,267.12$3,450.37$1,671.34$1,779.03$332,488.09
150$332,488.09$3,450.37$1,662.44$1,787.93$330,700.16
151$330,700.16$3,450.37$1,653.50$1,796.87$328,903.29
152$328,903.29$3,450.37$1,644.52$1,805.85$327,097.44
153$327,097.44$3,450.37$1,635.49$1,814.88$325,282.56
154$325,282.56$3,450.37$1,626.41$1,823.95$323,458.61
155$323,458.61$3,450.37$1,617.29$1,833.07$321,625.53
156$321,625.53$3,450.37$1,608.13$1,842.24$319,783.29
157$319,783.29$3,450.37$1,598.92$1,851.45$317,931.84
158$317,931.84$3,450.37$1,589.66$1,860.71$316,071.14
159$316,071.14$3,450.37$1,580.36$1,870.01$314,201.12
160$314,201.12$3,450.37$1,571.01$1,879.36$312,321.76
161$312,321.76$3,450.37$1,561.61$1,888.76$310,433.00
162$310,433.00$3,450.37$1,552.17$1,898.20$308,534.80
163$308,534.80$3,450.37$1,542.67$1,907.69$306,627.11
164$306,627.11$3,450.37$1,533.14$1,917.23$304,709.88
165$304,709.88$3,450.37$1,523.55$1,926.82$302,783.06
166$302,783.06$3,450.37$1,513.92$1,936.45$300,846.61
167$300,846.61$3,450.37$1,504.23$1,946.13$298,900.47
168$298,900.47$3,450.37$1,494.50$1,955.86$296,944.61
169$296,944.61$3,450.37$1,484.72$1,965.64$294,978.96
170$294,978.96$3,450.37$1,474.89$1,975.47$293,003.49
171$293,003.49$3,450.37$1,465.02$1,985.35$291,018.14
172$291,018.14$3,450.37$1,455.09$1,995.28$289,022.86
173$289,022.86$3,450.37$1,445.11$2,005.25$287,017.61
174$287,017.61$3,450.37$1,435.09$2,015.28$285,002.33
175$285,002.33$3,450.37$1,425.01$2,025.36$282,976.98
176$282,976.98$3,450.37$1,414.88$2,035.48$280,941.49
177$280,941.49$3,450.37$1,404.71$2,045.66$278,895.83
178$278,895.83$3,450.37$1,394.48$2,055.89$276,839.95
179$276,839.95$3,450.37$1,384.20$2,066.17$274,773.78
180$274,773.78$3,450.37$1,373.87$2,076.50$272,697.28
181$272,697.28$3,450.37$1,363.49$2,086.88$270,610.40
182$270,610.40$3,450.37$1,353.05$2,097.32$268,513.08
183$268,513.08$3,450.37$1,342.57$2,107.80$266,405.28
184$266,405.28$3,450.37$1,332.03$2,118.34$264,286.94
185$264,286.94$3,450.37$1,321.43$2,128.93$262,158.01
186$262,158.01$3,450.37$1,310.79$2,139.58$260,018.43
187$260,018.43$3,450.37$1,300.09$2,150.28$257,868.16
188$257,868.16$3,450.37$1,289.34$2,161.03$255,707.13
189$255,707.13$3,450.37$1,278.54$2,171.83$253,535.30
190$253,535.30$3,450.37$1,267.68$2,182.69$251,352.61
191$251,352.61$3,450.37$1,256.76$2,193.60$249,159.00
192$249,159.00$3,450.37$1,245.80$2,204.57$246,954.43
193$246,954.43$3,450.37$1,234.77$2,215.60$244,738.84
194$244,738.84$3,450.37$1,223.69$2,226.67$242,512.16
195$242,512.16$3,450.37$1,212.56$2,237.81$240,274.36
196$240,274.36$3,450.37$1,201.37$2,249.00$238,025.36
197$238,025.36$3,450.37$1,190.13$2,260.24$235,765.12
198$235,765.12$3,450.37$1,178.83$2,271.54$233,493.58
199$233,493.58$3,450.37$1,167.47$2,282.90$231,210.68
200$231,210.68$3,450.37$1,156.05$2,294.31$228,916.37
201$228,916.37$3,450.37$1,144.58$2,305.79$226,610.58
202$226,610.58$3,450.37$1,133.05$2,317.31$224,293.27
203$224,293.27$3,450.37$1,121.47$2,328.90$221,964.36
204$221,964.36$3,450.37$1,109.82$2,340.55$219,623.82
205$219,623.82$3,450.37$1,098.12$2,352.25$217,271.57
206$217,271.57$3,450.37$1,086.36$2,364.01$214,907.56
207$214,907.56$3,450.37$1,074.54$2,375.83$212,531.73
208$212,531.73$3,450.37$1,062.66$2,387.71$210,144.02
209$210,144.02$3,450.37$1,050.72$2,399.65$207,744.38
210$207,744.38$3,450.37$1,038.72$2,411.65$205,332.73
211$205,332.73$3,450.37$1,026.66$2,423.70$202,909.03
212$202,909.03$3,450.37$1,014.55$2,435.82$200,473.20
213$200,473.20$3,450.37$1,002.37$2,448.00$198,025.20
214$198,025.20$3,450.37$990.13$2,460.24$195,564.96
215$195,564.96$3,450.37$977.82$2,472.54$193,092.42
216$193,092.42$3,450.37$965.46$2,484.91$190,607.51
217$190,607.51$3,450.37$953.04$2,497.33$188,110.18
218$188,110.18$3,450.37$940.55$2,509.82$185,600.37
219$185,600.37$3,450.37$928.00$2,522.37$183,078.00
220$183,078.00$3,450.37$915.39$2,534.98$180,543.03
221$180,543.03$3,450.37$902.72$2,547.65$177,995.37
222$177,995.37$3,450.37$889.98$2,560.39$175,434.98
223$175,434.98$3,450.37$877.17$2,573.19$172,861.79
224$172,861.79$3,450.37$864.31$2,586.06$170,275.73
225$170,275.73$3,450.37$851.38$2,598.99$167,676.74
226$167,676.74$3,450.37$838.38$2,611.98$165,064.76
227$165,064.76$3,450.37$825.32$2,625.04$162,439.72
228$162,439.72$3,450.37$812.20$2,638.17$159,801.55
229$159,801.55$3,450.37$799.01$2,651.36$157,150.19
230$157,150.19$3,450.37$785.75$2,664.62$154,485.57
231$154,485.57$3,450.37$772.43$2,677.94$151,807.63
232$151,807.63$3,450.37$759.04$2,691.33$149,116.30
233$149,116.30$3,450.37$745.58$2,704.79$146,411.52
234$146,411.52$3,450.37$732.06$2,718.31$143,693.21
235$143,693.21$3,450.37$718.47$2,731.90$140,961.31
236$140,961.31$3,450.37$704.81$2,745.56$138,215.75
237$138,215.75$3,450.37$691.08$2,759.29$135,456.46
238$135,456.46$3,450.37$677.28$2,773.08$132,683.37
239$132,683.37$3,450.37$663.42$2,786.95$129,896.42
240$129,896.42$3,450.37$649.48$2,800.89$127,095.54
241$127,095.54$3,450.37$635.48$2,814.89$124,280.65
242$124,280.65$3,450.37$621.40$2,828.96$121,451.68
243$121,451.68$3,450.37$607.26$2,843.11$118,608.57
244$118,608.57$3,450.37$593.04$2,857.32$115,751.25
245$115,751.25$3,450.37$578.76$2,871.61$112,879.64
246$112,879.64$3,450.37$564.40$2,885.97$109,993.67
247$109,993.67$3,450.37$549.97$2,900.40$107,093.27
248$107,093.27$3,450.37$535.47$2,914.90$104,178.37
249$104,178.37$3,450.37$520.89$2,929.48$101,248.89
250$101,248.89$3,450.37$506.24$2,944.12$98,304.77
251$98,304.77$3,450.37$491.52$2,958.84$95,345.93
252$95,345.93$3,450.37$476.73$2,973.64$92,372.29
253$92,372.29$3,450.37$461.86$2,988.51$89,383.79
254$89,383.79$3,450.37$446.92$3,003.45$86,380.34
255$86,380.34$3,450.37$431.90$3,018.47$83,361.87
256$83,361.87$3,450.37$416.81$3,033.56$80,328.31
257$80,328.31$3,450.37$401.64$3,048.73$77,279.59
258$77,279.59$3,450.37$386.40$3,063.97$74,215.62
259$74,215.62$3,450.37$371.08$3,079.29$71,136.33
260$71,136.33$3,450.37$355.68$3,094.69$68,041.64
261$68,041.64$3,450.37$340.21$3,110.16$64,931.48
262$64,931.48$3,450.37$324.66$3,125.71$61,805.77
263$61,805.77$3,450.37$309.03$3,141.34$58,664.44
264$58,664.44$3,450.37$293.32$3,157.05$55,507.39
265$55,507.39$3,450.37$277.54$3,172.83$52,334.56
266$52,334.56$3,450.37$261.67$3,188.69$49,145.87
267$49,145.87$3,450.37$245.73$3,204.64$45,941.23
268$45,941.23$3,450.37$229.71$3,220.66$42,720.57
269$42,720.57$3,450.37$213.60$3,236.76$39,483.80
270$39,483.80$3,450.37$197.42$3,252.95$36,230.85
271$36,230.85$3,450.37$181.15$3,269.21$32,961.64
272$32,961.64$3,450.37$164.81$3,285.56$29,676.08
273$29,676.08$3,450.37$148.38$3,301.99$26,374.10
274$26,374.10$3,450.37$131.87$3,318.50$23,055.60
275$23,055.60$3,450.37$115.28$3,335.09$19,720.51
276$19,720.51$3,450.37$98.60$3,351.76$16,368.74
277$16,368.74$3,450.37$81.84$3,368.52$13,000.22
278$13,000.22$3,450.37$65.00$3,385.37$9,614.85
279$9,614.85$3,450.37$48.07$3,402.29$6,212.56
280$6,212.56$3,450.37$31.06$3,419.30$2,793.26
281$2,793.26$2,807.22$13.97$2,793.26$0.00

So what does this actually mean?

On these assumptions, borrowing $520,000 costs $485,110 in interest over the original term. Adding $100 each payment saves $36,200 because the balance falls sooner.

A shorter term or extra payments reduce interest but use more cash now. A higher rate raises the repayment. Check lender fees, repayment restrictions and how much room your household budget has before choosing a loan. This is an illustration, not a lending quote.

Understand this tool

What this calculator is showing you

A fully amortising loan with equal repayments. Interest is the annual nominal rate divided by the number of payments per year; balances reduce after each payment.

How to use it
  1. Enter purchase price or loan principal, deposit, rate and term.
  2. Select payment frequency.
  3. Add an extra payment to compare a faster payoff with the original schedule.
What the result means

Each payment covers interest first and then reduces principal. Earlier extra payments reduce the balance on which later interest is charged. Rate scenarios hold the term and principal constant.

Things this calculator does not know

Lender fees, daily interest conventions, floating-rate changes, offset accounts, interest-only periods and early-repayment charges. Weekly and fortnightly options recalculate the repayment; they are not half or a quarter of a monthly repayment.

Try changing this

Try rates 1–3 percentage points higher, then add a manageable extra payment. Ask the lender about fees and whether extra repayments are allowed.

Scenario prepared 30/10/2026. Assumptions and results are illustrative.