Home Loan Calculator NZ
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计算方法

我们如何计算每项限额、在银行不公布其做法之处我们所作的选择、我们的假设,以及每项引擎测试及其结果。

公布利率截至 2026年11月10日。测试利率确认于 2026年7月13日。规则核查于 2026年11月10日。

方法,以及我们选择它们的原因

答案

我们计算三项限额并取最低者:还款能力、债务收入比限额和首付 (LVR) 限额。结果会说明哪一项起决定作用以及原因。由银行决定;这只是估算。

还款能力

每月剩余金额 = 税后收入 + 计入的租金部分 − 生活费 − 其他债务还款 − 任何缓冲金。可支持的贷款为年金的现值:贷款 = 余额 × (1 − (1 + r)^−n) / r,其中 r 为测试利率除以 12,n = 360 个月。该公式来自我们还款网站所用的共享引擎。

测试利率

各银行公布的测试利率,由 interest.co.nz 和 MPA 于 2026 年 7 月确认。我们默认使用五家银行的平均值(6.94%),以免偏向任何一家银行,并按字母顺序显示每家银行。30 年测试期限仅来自二手资料。

生活费:我们的假设

银行把您的生活费与其不公布的内部基准进行比较。我们取您的金额与我们自己的下限中较高者:第一位成年人每月 $1,600,其他每位成年人 $800,每位受抚养子女 $500。这些是我们的假设,不是银行的数字。您可以关闭下限。

DTI 限额

税前收入(包括全部租金)× 6(自住业主)或 × 7(投资者),减去现有债务,包括信用卡和透支的全部额度。正好为 6 属于限额之内;高于 6 则为偏高。

首付 (LVR) 限额

贷款 = 首付 × LVR / (1 − LVR):自住业主为 80%,投资者为 70%,First Home Loan 为 95%,低首付贷款或新建房屋则为您选择的比例。正好为 80% 属于规则之内;高于 80% 则为偏高。

豁免

First Home Loan 可豁免 LVR 限制,据二手资料也可豁免 DTI;新建房屋两者均可豁免。我们把获豁免的限额显示为豁免。我们无法在 rbnz.govt.nz 上确认目前的措辞。

租金

按照 Kiwibank 的说明,评估还款能力时我们计入 75% 的租金(两个来源称为 70% 至 80%),计算 DTI 时则把全部租金计为收入。

房价范围

按各银行测试利率计算的贷款加首付,从最严格到最宽松。还款额按五家银行公布的 1 年期利率平均值计算,与我们还款网站使用同一张注明日期的利率表,并向上取整到分。

我们未计入的项目

税款:您输入的是税后收入。信用卡额度:计入 DTI,但不作为每月费用,因为银行不公布其所用的比例。购房费用从您输入的首付中扣除。

利率从何而来

银行测试利率来自 interest.co.nz,确认于 2026年7月13日。公布利率来自与我们还款网站相同的每周利率表,日期为 2026年11月10日。本网站上的利率总是附有日期。

引擎测试

我们研究文件中的每个借款案例(HL-01 至 HL-14)以及我们的引擎检查,都会在每次构建前运行,任何失败都会使构建停止。于 2026年11月10日:58 项通过,0 项失败。

检查项依据结果详情来源
HL-01 DTI ratiosourced通过expected 6.25, got 6.25来源
HL-01 owner-occupier high DTIsourced通过expected true来源
HL-02 DTI 600000/100000computed from sourced rule通过expected 6, got 6来源
HL-02 high DTI flag at 6 (owner-occupier)computed from sourced rule通过expected false, got false来源
HL-02 DTI 601000/100000computed from sourced rule通过expected 6.01, got 6.01来源
HL-02 high DTI flag at 6.01 (owner-occupier)computed from sourced rule通过expected true, got true来源
HL-03 investor DTIcomputed from sourced rule通过expected 7, got 7来源
HL-03 investor at 7 is not highcomputed from sourced rule通过expected false来源
HL-04 max total debt at DTI 6computed from sourced rule通过expected 720000, got 720000来源
HL-04 max new home loan after the card limitcomputed from sourced rule通过expected 710000, got 710000来源
HL-05 LVR 640000/800000computed from sourced rule通过expected 0.8, got 0.8来源
HL-05 high LVR flag at 0.8 (owner-occupier)computed from sourced rule通过expected false, got false来源
HL-05 LVR 640080/800000computed from sourced rule通过expected 0.8001, got 0.8001来源
HL-05 high LVR flag at 0.8001 (owner-occupier)computed from sourced rule通过expected true, got true来源
HL-06 investor LVRcomputed from sourced rule通过expected 0.7, got 0.7来源
HL-06 investor at 70% is not highcomputed from sourced rule通过expected false来源
HL-06 investor deposit for standard lendingcomputed from sourced rule通过expected 270000, got 270000来源
HL-07 deposit firstHomeLoan5pctcomputed from sourced rules通过expected 35000, got 35000来源
HL-07 deposit standard20pctcomputed from sourced rules通过expected 140000, got 140000来源
HL-07 deposit investor30pctcomputed from sourced rules通过expected 210000, got 210000来源
HL-08 First Home Loan premium1_2pctcomputed from sourced rule通过expected 6840, got 6840来源
HL-08 First Home Loan kiwibankFee1_0pctcomputed from sourced rule通过expected 5700, got 5700来源
HL-08 First Home Loan oldRate0_5pctcomputed from sourced rule通过expected 2850, got 2850来源
HL-09 First Home Loan eligibility: 1 buyer(s), 0 dependant(s), $95000computed from sourced rule通过expected true, got true来源
HL-09 First Home Loan eligibility: 1 buyer(s), 0 dependant(s), $95001computed from sourced rule通过expected false, got false来源
HL-09 First Home Loan eligibility: 1 buyer(s), 1 dependant(s), $150000computed from sourced rule通过expected true, got true来源
HL-09 First Home Loan eligibility: 2 buyer(s), 0 dependant(s), $150000computed from sourced rule通过expected true, got true来源
HL-09 First Home Loan eligibility: 2 buyer(s), 0 dependant(s), $150001computed from sourced rule通过expected false, got false来源
HL-10 KiwiSaver withdrawal from $25000computed from sourced rule通过expected 24000, got 24000来源
HL-10 KiwiSaver withdrawal from $800computed from sourced rule通过expected 0, got 0来源
HL-10 KiwiSaver withdrawal from $30000 ($5000 from Australia)computed from sourced rule通过expected 24000, got 24000来源
HL-11 loan $3000 a month supports at 6.85%computed通过expected 457834.08, got 457834.0814来源
HL-12 loan $3000 a month supports at 7.1%computed通过expected 446407.34, got 446407.3408来源
HL-13 low equity premium rate (UNVERIFIED rates)computed from single-source rates通过expected 0.0075, got 0.0075来源
HL-13 low equity premium a yearcomputed from single-source rates通过expected 4500, got 4500来源
HL-14 gross rent a yearcomputed (default is a choice, see research s 3.4)通过expected 33800, got 33800来源
HL-14 rent counted at 75%computed (default is a choice, see research s 3.4)通过expected 25350, got 25350来源
engine: DTI thresholds and speed limits match the rules fileengine通过6 and 7, 20% each来源
engine: LVR thresholds and speed limits match the rules fileengine通过80% and 70%, 25% and 10%来源
engine: bank test rates match the rules fileengine通过ANZ 6.85%, ASB 6.85%, BNZ 7.1%, Kiwibank 6.95%, Westpac 6.95%来源
engine: First Home Loan deposit, caps and premiums match the rules fileengine通过5%, $95,000 / $150,000, 1.2% and 1.00%来源
engine: KiwiSaver, low equity premiums, rent share and cost ranges match the rules fileengine通过3 years and $1,000; Canstar bands; 75% (70 to 80%); cost ranges
engine: principalForPayment and tablePayment round trip to the centengine通过loan 485506.99 back to 3210.5500 a month
engine: at a 0% rate the surplus supports surplus x monthsengine通过got 1800000
engine: serviceability binds when it is the lowest limit, and the loan equals itengine通过loan 710745.16; DTI 755000; LVR 800000.0000000002
engine: LVR binds with a small deposit (loan = deposit x 4 at 80%)engine通过loan 400000.0000000001, LVR 0.8
engine: DTI binds with high take-home and a big deposit (6 x income less debts)engine通过loan 575000, DTI after 6
engine: First Home Loan path lends to 95% and is DTI exemptengine通过LVR limit 759999.9999999993
engine: investors use 7 x income and a 30% deposit (no First Home Loan)engine通过DTI limit 885000, LVR limit 699999.9999999999
engine: our living-cost floor applies when entered costs are lower (our assumption, labelled)engine通过used 2400
engine: no surplus means no serviceability, and serviceability bindsengine通过surplus -600
engine: banks listed alphabetically, and a higher test rate never lends moreengine通过ANZ 717273, ASB 717273, BNZ 699372, Kiwibank 710026, Westpac 710026
engine: average of the five test rates is 6.94%engine通过got 6.94
engine: borrowing exactly the DTI limit leaves DTI at 6, which is not highengine通过limit 600000
engine: the LVR limit loan sits exactly at 80%, not above it; a dollar more is highengine通过loan 640000.0000000001
engine: low equity bands split at 80%, 85%, 90% and 95%engine通过bands -1, 0, 1, 2, 3
engine: KiwiSaver first-home withdrawal needs 3 years of membershipengine通过2.9 years no, 3 years yes
engine: debts reduce the DTI limit dollar for dollar, including card limitsengine通过never below zero