Loans & Payments · Formula v1.0

Amortization Schedule Calculator

Build a payment-by-payment loan amortization schedule.

See how each payment divides between interest and principal. Enter loan amount in dollars, annual interest rate in percent and term in years (6.5 means 6.5%). At the worked-example inputs, the monthly payment is $1,896. Use the schedule to see how much of each payment is interest and when the balance crosses half. On a 30-year loan at 6.5%, the balance stays close to the original for years because early payments are mostly interest. That is why a modest extra payment in the first few years shortens the loan so much: it removes principal that would have generated interest for decades. It returns monthly payment, total interest.

FreeNo sign-upInputs stay in-browserCSV exportReviewed August 17, 2026
LAST REVIEWEDAugust 17, 2026Inputs stay in your browser
Live calculation

Enter your numbers

Calculated result
Monthly payment$1,896
Total interest$382,633
Sensitivity check

What if annual interest rate changes?

-10% input$1,770
0% input$1,896
+10% input$2,026
Year-by-year evidence

Amortization schedule

PeriodOpeningPrincipal / contributionInterest / growthEnding
Payment 1$300,000$271$1,625$299,729
Payment 12$296,935$288$1,608$296,647
Payment 24$293,376$307$1,589$293,069
Payment 36$289,579$328$1,569$289,252
Payment 48$285,528$350$1,547$285,179
Payment 60$281,206$373$1,523$280,833
Payment 72$276,594$398$1,498$276,196
Payment 84$271,673$425$1,472$271,249
Payment 96$266,423$453$1,443$265,970
Payment 108$260,821$483$1,413$260,338
Payment 120$254,844$516$1,380$254,328
Payment 132$248,467$550$1,346$247,916
Payment 144$241,662$587$1,309$241,075
Payment 156$234,402$627$1,270$233,776
Payment 168$226,656$668$1,228$225,987
Payment 180$218,391$713$1,183$217,677
Payment 192$209,572$761$1,135$208,811
Payment 204$200,163$812$1,084$199,351
Payment 216$190,123$866$1,030$189,257
Payment 228$179,411$924$972$178,487
Payment 240$167,982$986$910$166,996
Payment 252$155,787$1,052$844$154,735
Payment 264$142,776$1,123$773$141,653
Payment 276$128,893$1,198$698$127,695
Payment 288$114,081$1,278$618$112,803
Payment 300$98,276$1,364$532$96,912
Payment 312$81,413$1,455$441$79,958
Payment 324$63,421$1,553$344$61,868
Payment 336$44,224$1,657$240$42,567
Payment 348$23,741$1,768$129$21,973
Payment 360$1,886$1,886$10$0.00

Monthly schedules show the first payment, annual checkpoints and the final payment on screen; the CSV contains every calculated row.

Transparent method

The formula

Level payment = P × r(1+r)ⁿ ÷ ((1+r)ⁿ−1); each period interest = balance × r

Worked example

Monthly payment$1,896
Total interest$382,633

Example inputs

Loan amount$300,000
Annual interest rate6.5%
Term30.0 years

How to interpret the result

A schedule shows what a level payment hides: how each month's payment splits between interest and principal. On a $300,000 loan at 6.5 percent over 30 years, the payment is about $1,896 and the total interest is about $382,633. Interest exceeds principal in every payment until about month 233, when the balance has fallen near $174,700. After ten years you still owe about $254,300, more than 84 percent of the loan, which is why paying off early feels slow at first.

Before you rely on it

What to check

Match the schedule to your loan documents, including the payment date and how the first period is counted. Small differences come from odd first periods and rounding.

The common error

Where people go wrong with amortization schedule calculator

Assuming half the loan is repaid halfway through the term. Because the early payments are mostly interest, the balance at the midpoint is well above half.

Sensitivity evidence

How annual interest rate changes the monthly payment

Amortization Schedule Calculator: monthly payment and total interest across a range of annual interest rate, every other input held at the worked-example value.
Annual interest rateMonthly paymentTotal interest
4.5%$1,520$247,220
5.5%$1,703$313,212
6.5%worked example$1,896$382,633
7.5%$2,098$455,152
8.5%$2,307$530,427

Every input, tested

Which input moves the monthly payment most

Amortization Schedule Calculator: monthly payment with each input moved on its own, every other input held at the worked-example value.
InputTested fromToMonthly payment at each endSwing
Annual interest rate5.5%7.5%$1,703 to $2,098$394 (21%)
Loan amount$270,000$330,000$1,707 to $2,086$379 (20%)
Term22.0 years38.0 years$2,139 to $1,776$363 (19%)

Two variables at once

Monthly payment by annual interest rate and loan amount

Amortization Schedule Calculator: monthly payment at each combination of annual interest rate (rows) and loan amount (columns).
Annual interest rate \ Loan amount$240,000$300,000$360,000
4.5%$1,216$1,520$1,824
5.5%$1,363$1,703$2,044
6.5%$1,517$1,896$2,275
7.5%$1,678$2,098$2,517
8.5%$1,845$2,307$2,768

Step by step

The worked example, input by input

Worked-example inputs and the results they produce for the amortization schedule calculator.
InputValue used
Loan amount$300,000
Annual interest rate6.5%
Term30.0 years
Monthly payment$1,896
Total interest$382,633

Complete evidence

Full amortization schedule

Show all 360 rows
Amortization Schedule Calculator: complete amortization schedule for the worked-example inputs.
PaymentOpening balancePrincipalInterestEnding balance
Payment 1$300,000$271$1,625$299,729
Payment 2$299,729$273$1,624$299,456
Payment 3$299,456$274$1,622$299,182
Payment 4$299,182$276$1,621$298,906
Payment 5$298,906$277$1,619$298,629
Payment 6$298,629$279$1,618$298,351
Payment 7$298,351$280$1,616$298,070
Payment 8$298,070$282$1,615$297,789
Payment 9$297,789$283$1,613$297,506
Payment 10$297,506$285$1,611$297,221
Payment 11$297,221$286$1,610$296,935
Payment 12$296,935$288$1,608$296,647
Payment 13$296,647$289$1,607$296,357
Payment 14$296,357$291$1,605$296,067
Payment 15$296,067$293$1,604$295,774
Payment 16$295,774$294$1,602$295,480
Payment 17$295,480$296$1,601$295,184
Payment 18$295,184$297$1,599$294,887
Payment 19$294,887$299$1,597$294,588
Payment 20$294,588$301$1,596$294,288
Payment 21$294,288$302$1,594$293,985
Payment 22$293,985$304$1,592$293,682
Payment 23$293,682$305$1,591$293,376
Payment 24$293,376$307$1,589$293,069
Payment 25$293,069$309$1,587$292,760
Payment 26$292,760$310$1,586$292,450
Payment 27$292,450$312$1,584$292,138
Payment 28$292,138$314$1,582$291,824
Payment 29$291,824$315$1,581$291,509
Payment 30$291,509$317$1,579$291,191
Payment 31$291,191$319$1,577$290,872
Payment 32$290,872$321$1,576$290,552
Payment 33$290,552$322$1,574$290,229
Payment 34$290,229$324$1,572$289,905
Payment 35$289,905$326$1,570$289,579
Payment 36$289,579$328$1,569$289,252
Payment 37$289,252$329$1,567$288,922
Payment 38$288,922$331$1,565$288,591
Payment 39$288,591$333$1,563$288,258
Payment 40$288,258$335$1,561$287,923
Payment 41$287,923$337$1,560$287,587
Payment 42$287,587$338$1,558$287,248
Payment 43$287,248$340$1,556$286,908
Payment 44$286,908$342$1,554$286,566
Payment 45$286,566$344$1,552$286,222
Payment 46$286,222$346$1,550$285,876
Payment 47$285,876$348$1,548$285,528
Payment 48$285,528$350$1,547$285,179
Payment 49$285,179$351$1,545$284,827
Payment 50$284,827$353$1,543$284,474
Payment 51$284,474$355$1,541$284,119
Payment 52$284,119$357$1,539$283,761
Payment 53$283,761$359$1,537$283,402
Payment 54$283,402$361$1,535$283,041
Payment 55$283,041$363$1,533$282,678
Payment 56$282,678$365$1,531$282,313
Payment 57$282,313$367$1,529$281,946
Payment 58$281,946$369$1,527$281,577
Payment 59$281,577$371$1,525$281,206
Payment 60$281,206$373$1,523$280,833
Payment 61$280,833$375$1,521$280,458
Payment 62$280,458$377$1,519$280,081
Payment 63$280,081$379$1,517$279,702
Payment 64$279,702$381$1,515$279,321
Payment 65$279,321$383$1,513$278,937
Payment 66$278,937$385$1,511$278,552
Payment 67$278,552$387$1,509$278,165
Payment 68$278,165$389$1,507$277,775
Payment 69$277,775$392$1,505$277,384
Payment 70$277,384$394$1,502$276,990
Payment 71$276,990$396$1,500$276,594
Payment 72$276,594$398$1,498$276,196
Payment 73$276,196$400$1,496$275,796
Payment 74$275,796$402$1,494$275,394
Payment 75$275,394$404$1,492$274,989
Payment 76$274,989$407$1,490$274,582
Payment 77$274,582$409$1,487$274,174
Payment 78$274,174$411$1,485$273,763
Payment 79$273,763$413$1,483$273,349
Payment 80$273,349$416$1,481$272,934
Payment 81$272,934$418$1,478$272,516
Payment 82$272,516$420$1,476$272,096
Payment 83$272,096$422$1,474$271,673
Payment 84$271,673$425$1,472$271,249
Payment 85$271,249$427$1,469$270,822
Payment 86$270,822$429$1,467$270,393
Payment 87$270,393$432$1,465$269,961
Payment 88$269,961$434$1,462$269,527
Payment 89$269,527$436$1,460$269,091
Payment 90$269,091$439$1,458$268,652
Payment 91$268,652$441$1,455$268,211
Payment 92$268,211$443$1,453$267,768
Payment 93$267,768$446$1,450$267,322
Payment 94$267,322$448$1,448$266,874
Payment 95$266,874$451$1,446$266,423
Payment 96$266,423$453$1,443$265,970
Payment 97$265,970$456$1,441$265,514
Payment 98$265,514$458$1,438$265,056
Payment 99$265,056$460$1,436$264,596
Payment 100$264,596$463$1,433$264,133
Payment 101$264,133$465$1,431$263,668
Payment 102$263,668$468$1,428$263,200
Payment 103$263,200$471$1,426$262,729
Payment 104$262,729$473$1,423$262,256
Payment 105$262,256$476$1,421$261,780
Payment 106$261,780$478$1,418$261,302
Payment 107$261,302$481$1,415$260,821
Payment 108$260,821$483$1,413$260,338
Payment 109$260,338$486$1,410$259,852
Payment 110$259,852$489$1,408$259,363
Payment 111$259,363$491$1,405$258,872
Payment 112$258,872$494$1,402$258,378
Payment 113$258,378$497$1,400$257,881
Payment 114$257,881$499$1,397$257,382
Payment 115$257,382$502$1,394$256,880
Payment 116$256,880$505$1,391$256,375
Payment 117$256,375$508$1,389$255,867
Payment 118$255,867$510$1,386$255,357
Payment 119$255,357$513$1,383$254,844
Payment 120$254,844$516$1,380$254,328
Payment 121$254,328$519$1,378$253,810
Payment 122$253,810$521$1,375$253,288
Payment 123$253,288$524$1,372$252,764
Payment 124$252,764$527$1,369$252,237
Payment 125$252,237$530$1,366$251,707
Payment 126$251,707$533$1,363$251,174
Payment 127$251,174$536$1,361$250,639
Payment 128$250,639$539$1,358$250,100
Payment 129$250,100$541$1,355$249,559
Payment 130$249,559$544$1,352$249,014
Payment 131$249,014$547$1,349$248,467
Payment 132$248,467$550$1,346$247,916
Payment 133$247,916$553$1,343$247,363
Payment 134$247,363$556$1,340$246,807
Payment 135$246,807$559$1,337$246,248
Payment 136$246,248$562$1,334$245,685
Payment 137$245,685$565$1,331$245,120
Payment 138$245,120$568$1,328$244,551
Payment 139$244,551$572$1,325$243,980
Payment 140$243,980$575$1,322$243,405
Payment 141$243,405$578$1,318$242,827
Payment 142$242,827$581$1,315$242,246
Payment 143$242,246$584$1,312$241,662
Payment 144$241,662$587$1,309$241,075
Payment 145$241,075$590$1,306$240,485
Payment 146$240,485$594$1,303$239,891
Payment 147$239,891$597$1,299$239,294
Payment 148$239,294$600$1,296$238,694
Payment 149$238,694$603$1,293$238,091
Payment 150$238,091$607$1,290$237,485
Payment 151$237,485$610$1,286$236,875
Payment 152$236,875$613$1,283$236,262
Payment 153$236,262$616$1,280$235,645
Payment 154$235,645$620$1,276$235,025
Payment 155$235,025$623$1,273$234,402
Payment 156$234,402$627$1,270$233,776
Payment 157$233,776$630$1,266$233,146
Payment 158$233,146$633$1,263$232,512
Payment 159$232,512$637$1,259$231,876
Payment 160$231,876$640$1,256$231,235
Payment 161$231,235$644$1,253$230,592
Payment 162$230,592$647$1,249$229,945
Payment 163$229,945$651$1,246$229,294
Payment 164$229,294$654$1,242$228,640
Payment 165$228,640$658$1,238$227,982
Payment 166$227,982$661$1,235$227,321
Payment 167$227,321$665$1,231$226,656
Payment 168$226,656$668$1,228$225,987
Payment 169$225,987$672$1,224$225,315
Payment 170$225,315$676$1,220$224,640
Payment 171$224,640$679$1,217$223,960
Payment 172$223,960$683$1,213$223,277
Payment 173$223,277$687$1,209$222,590
Payment 174$222,590$691$1,206$221,900
Payment 175$221,900$694$1,202$221,205
Payment 176$221,205$698$1,198$220,507
Payment 177$220,507$702$1,194$219,806
Payment 178$219,806$706$1,191$219,100
Payment 179$219,100$709$1,187$218,391
Payment 180$218,391$713$1,183$217,677
Payment 181$217,677$717$1,179$216,960
Payment 182$216,960$721$1,175$216,239
Payment 183$216,239$725$1,171$215,514
Payment 184$215,514$729$1,167$214,786
Payment 185$214,786$733$1,163$214,053
Payment 186$214,053$737$1,159$213,316
Payment 187$213,316$741$1,155$212,575
Payment 188$212,575$745$1,151$211,831
Payment 189$211,831$749$1,147$211,082
Payment 190$211,082$753$1,143$210,329
Payment 191$210,329$757$1,139$209,572
Payment 192$209,572$761$1,135$208,811
Payment 193$208,811$765$1,131$208,046
Payment 194$208,046$769$1,127$207,277
Payment 195$207,277$773$1,123$206,503
Payment 196$206,503$778$1,119$205,725
Payment 197$205,725$782$1,114$204,944
Payment 198$204,944$786$1,110$204,157
Payment 199$204,157$790$1,106$203,367
Payment 200$203,367$795$1,102$202,572
Payment 201$202,572$799$1,097$201,774
Payment 202$201,774$803$1,093$200,970
Payment 203$200,970$808$1,089$200,163
Payment 204$200,163$812$1,084$199,351
Payment 205$199,351$816$1,080$198,534
Payment 206$198,534$821$1,075$197,713
Payment 207$197,713$825$1,071$196,888
Payment 208$196,888$830$1,066$196,058
Payment 209$196,058$834$1,062$195,224
Payment 210$195,224$839$1,057$194,386
Payment 211$194,386$843$1,053$193,542
Payment 212$193,542$848$1,048$192,694
Payment 213$192,694$852$1,044$191,842
Payment 214$191,842$857$1,039$190,985
Payment 215$190,985$862$1,035$190,123
Payment 216$190,123$866$1,030$189,257
Payment 217$189,257$871$1,025$188,386
Payment 218$188,386$876$1,020$187,510
Payment 219$187,510$881$1,016$186,629
Payment 220$186,629$885$1,011$185,744
Payment 221$185,744$890$1,006$184,854
Payment 222$184,854$895$1,001$183,959
Payment 223$183,959$900$996$183,059
Payment 224$183,059$905$992$182,155
Payment 225$182,155$910$987$181,245
Payment 226$181,245$914$982$180,331
Payment 227$180,331$919$977$179,411
Payment 228$179,411$924$972$178,487
Payment 229$178,487$929$967$177,558
Payment 230$177,558$934$962$176,623
Payment 231$176,623$939$957$175,684
Payment 232$175,684$945$952$174,739
Payment 233$174,739$950$947$173,789
Payment 234$173,789$955$941$172,835
Payment 235$172,835$960$936$171,875
Payment 236$171,875$965$931$170,909
Payment 237$170,909$970$926$169,939
Payment 238$169,939$976$921$168,963
Payment 239$168,963$981$915$167,982
Payment 240$167,982$986$910$166,996
Payment 241$166,996$992$905$166,004
Payment 242$166,004$997$899$165,007
Payment 243$165,007$1,002$894$164,005
Payment 244$164,005$1,008$888$162,997
Payment 245$162,997$1,013$883$161,984
Payment 246$161,984$1,019$877$160,965
Payment 247$160,965$1,024$872$159,941
Payment 248$159,941$1,030$866$158,911
Payment 249$158,911$1,035$861$157,875
Payment 250$157,875$1,041$855$156,834
Payment 251$156,834$1,047$850$155,787
Payment 252$155,787$1,052$844$154,735
Payment 253$154,735$1,058$838$153,677
Payment 254$153,677$1,064$832$152,613
Payment 255$152,613$1,070$827$151,544
Payment 256$151,544$1,075$821$150,468
Payment 257$150,468$1,081$815$149,387
Payment 258$149,387$1,087$809$148,300
Payment 259$148,300$1,093$803$147,207
Payment 260$147,207$1,099$797$146,108
Payment 261$146,108$1,105$791$145,004
Payment 262$145,004$1,111$785$143,893
Payment 263$143,893$1,117$779$142,776
Payment 264$142,776$1,123$773$141,653
Payment 265$141,653$1,129$767$140,524
Payment 266$140,524$1,135$761$139,389
Payment 267$139,389$1,141$755$138,248
Payment 268$138,248$1,147$749$137,101
Payment 269$137,101$1,154$743$135,947
Payment 270$135,947$1,160$736$134,787
Payment 271$134,787$1,166$730$133,621
Payment 272$133,621$1,172$724$132,449
Payment 273$132,449$1,179$717$131,270
Payment 274$131,270$1,185$711$130,085
Payment 275$130,085$1,192$705$128,893
Payment 276$128,893$1,198$698$127,695
Payment 277$127,695$1,205$692$126,491
Payment 278$126,491$1,211$685$125,280
Payment 279$125,280$1,218$679$124,062
Payment 280$124,062$1,224$672$122,838
Payment 281$122,838$1,231$665$121,607
Payment 282$121,607$1,237$659$120,370
Payment 283$120,370$1,244$652$119,125
Payment 284$119,125$1,251$645$117,875
Payment 285$117,875$1,258$638$116,617
Payment 286$116,617$1,265$632$115,352
Payment 287$115,352$1,271$625$114,081
Payment 288$114,081$1,278$618$112,803
Payment 289$112,803$1,285$611$111,517
Payment 290$111,517$1,292$604$110,225
Payment 291$110,225$1,299$597$108,926
Payment 292$108,926$1,306$590$107,620
Payment 293$107,620$1,313$583$106,307
Payment 294$106,307$1,320$576$104,986
Payment 295$104,986$1,328$569$103,659
Payment 296$103,659$1,335$561$102,324
Payment 297$102,324$1,342$554$100,982
Payment 298$100,982$1,349$547$99,633
Payment 299$99,633$1,357$540$98,276
Payment 300$98,276$1,364$532$96,912
Payment 301$96,912$1,371$525$95,541
Payment 302$95,541$1,379$518$94,163
Payment 303$94,163$1,386$510$92,776
Payment 304$92,776$1,394$503$91,383
Payment 305$91,383$1,401$495$89,981
Payment 306$89,981$1,409$487$88,573
Payment 307$88,573$1,416$480$87,156
Payment 308$87,156$1,424$472$85,732
Payment 309$85,732$1,432$464$84,300
Payment 310$84,300$1,440$457$82,861
Payment 311$82,861$1,447$449$81,413
Payment 312$81,413$1,455$441$79,958
Payment 313$79,958$1,463$433$78,495
Payment 314$78,495$1,471$425$77,024
Payment 315$77,024$1,479$417$75,545
Payment 316$75,545$1,487$409$74,058
Payment 317$74,058$1,495$401$72,563
Payment 318$72,563$1,503$393$71,060
Payment 319$71,060$1,511$385$69,549
Payment 320$69,549$1,519$377$68,029
Payment 321$68,029$1,528$368$66,501
Payment 322$66,501$1,536$360$64,965
Payment 323$64,965$1,544$352$63,421
Payment 324$63,421$1,553$344$61,868
Payment 325$61,868$1,561$335$60,307
Payment 326$60,307$1,570$327$58,738
Payment 327$58,738$1,578$318$57,160
Payment 328$57,160$1,587$310$55,573
Payment 329$55,573$1,595$301$53,978
Payment 330$53,978$1,604$292$52,374
Payment 331$52,374$1,613$284$50,762
Payment 332$50,762$1,621$275$49,140
Payment 333$49,140$1,630$266$47,510
Payment 334$47,510$1,639$257$45,871
Payment 335$45,871$1,648$248$44,224
Payment 336$44,224$1,657$240$42,567
Payment 337$42,567$1,666$231$40,901
Payment 338$40,901$1,675$222$39,227
Payment 339$39,227$1,684$212$37,543
Payment 340$37,543$1,693$203$35,850
Payment 341$35,850$1,702$194$34,148
Payment 342$34,148$1,711$185$32,437
Payment 343$32,437$1,721$176$30,716
Payment 344$30,716$1,730$166$28,987
Payment 345$28,987$1,739$157$27,247
Payment 346$27,247$1,749$148$25,499
Payment 347$25,499$1,758$138$23,741
Payment 348$23,741$1,768$129$21,973
Payment 349$21,973$1,777$119$20,196
Payment 350$20,196$1,787$109$18,409
Payment 351$18,409$1,796$100$16,613
Payment 352$16,613$1,806$90$14,806
Payment 353$14,806$1,816$80$12,990
Payment 354$12,990$1,826$70$11,165
Payment 355$11,165$1,836$60$9,329
Payment 356$9,329$1,846$51$7,483
Payment 357$7,483$1,856$41$5,628
Payment 358$5,628$1,866$30$3,762
Payment 359$3,762$1,876$20$1,886
Payment 360$1,886$1,886$10$0.00

Where the inputs come from

Enter the amount financed, the note rate and the term in years, the same three numbers that appear on the loan estimate. For a mortgage, the loan amount is the price less down payment and excludes taxes and insurance, which are escrow items and not part of the amortization. The payment shown is principal and interest only, so it will be lower than the amount your servicer collects each month.

Using the monthly payment in a real decision

The total interest line is what the loan costs to own.

When the result stops applying

The schedule assumes a fixed rate and equal payments. Adjustable-rate loans, interest-only periods, recasts and changes in servicer can alter the pattern. If payments are due biweekly, the timing produces an extra payment each year and a different schedule. Rounding by lenders can leave the final payment a few cents different.

What to compare it with

The schedule is most useful for three questions: when equity crosses 20% so PMI can end, how much interest falls in a given tax year, and how much an extra payment shortens the loan. For the last, use the extra mortgage payment calculator. If you are choosing between terms, compare the balance after five and ten years on each, because that is the equity you would walk away with if you sold. Many owners are surprised how little principal a 30-year loan retires in the first decade.

People also ask

Frequently asked questions

Why is so much of my early payment interest?

Interest is charged on the outstanding balance, which is largest at the start. As principal falls, interest falls and the same payment covers more principal.

Does making extra payments change the schedule?

Yes. Extra principal shortens the loan and removes the interest that would have accrued on it. The scheduled payment stays the same unless the loan is recast.

Where do taxes and insurance go?

Into escrow, paid alongside the loan payment. They are not part of amortization, so the schedule does not change when they change.

Common loans & payments questions

Sources and evidence