Serviceability calculators: what multi-lender tools save you, and what they cost

What a multi-lender serviceability tool actually does

Every lender publishes its own serviceability calculator, usually as a locked spreadsheet distributed through your aggregator or the lender's broker portal. Each one applies that lender's own rules. How it shades rental income. How it treats overtime, bonuses and commission. How it assesses HECS and HELP debt. How it handles self-employed add-backs. Which household expenditure benchmark it uses, and how it buffers existing commitments.

A multi-lender tool takes one set of client inputs and runs them through many of those models at once. You enter income, commitments, household composition and the proposed loan once. The tool returns a ranked list of maximum borrowing capacity by lender. That is the core product. Everything else, the policy notes, the funds position calculators, the product comparisons, is built around it.

In Australia the category is dominated by one product. Broker Daily reported in August 2025 that 12,500 of the country's roughly 22,000 brokers were using Quickli. Quickli's own site claimed more than 14,000 broker users and coverage of 51 or more lenders when we checked on 17 August 2026. AutoCalc is a smaller alternative that publishes coverage of 12 lenders on its free tier and 27 or more on paid tiers, with payslip parsing built in. Finance OS, which publishes this site, has not tested either product.

The regulatory backdrop these tools have to keep up with

Serviceability in Australia is not a fixed formula. It moves when APRA moves. In July 2025 APRA confirmed it was keeping the mortgage serviceability buffer at 3 percentage points, stating that the current level of the buffer had not been restrictive on new credit to the household sector. Industry bodies have argued publicly for a lower buffer. It has not changed.

In November 2025 APRA announced a further constraint. From 1 February 2026, authorised deposit-taking institutions must limit lending at a debt-to-income ratio of six times or more to 20 per cent of their new mortgage lending. Bridging loans for owner-occupiers and loans for the purchase or construction of new dwellings are exempt, and smaller ADIs get proportionate treatment. Non-bank lenders are not subject to the limit.

That second change matters for calculator work in a specific way. A maximum borrowing capacity that clears serviceability can still be a loan a lender will not write this quarter, because of where its DTI mix sits against the cap. Capacity and appetite are now two separate questions. No serviceability calculator can tell you a lender's remaining DTI headroom.

Underneath both sits the household expenditure benchmark. Lenders take the higher of the client's declared living expenses and the benchmark figure for that household profile. Benchmarks are updated periodically and each lender applies them slightly differently. Keeping that current across dozens of lenders is a large part of what you are actually paying a multi-lender tool to do.

What they cost, as published

On 17 August 2026, Quickli's public pricing page listed two plans. Core showed at $590 per user per year plus GST and Pro at $990 per user per year plus GST, with lower figures of $530 and $930 displayed alongside an introductory offer. Monthly billing is offered at a higher rate than the annual figure, and the page advertises a 21 day trial. The introductory and standard prices sit close together on the page and are easy to misread, so confirm which rate applies to you before you sign.

Core is published as including the serviceability calculator, funds position, product comparison, policy and service level information, and quick calcs. Pro adds an SMSF serviceability tool, an alt doc and specialist tool, custom branding, organisation-level analytics and Quickli's AI features, which the page meters in monthly credits rather than offering unlimited.

AutoCalc publishes a free tier covering 12 lenders with 10 payslip parses a month and five saved cases, a Standard plan at $49 plus GST a month for 27 or more lenders and 50 parses, and a Pro plan at $99 plus GST a month with five logins and 300 pooled parses. It advertises a 14 day trial.

Put that against revenue. Mortgage Professional Australia, reporting on the seventeenth edition of the MFAA Industry Intelligence Service, recorded average annual upfront commission before costs of $117,142. A $590 annual subscription is roughly half a per cent of that. This is not a line item that decides whether a broking business works.

The saving is not the minutes, it is the submissions you do not make

Vendors sell time. Quickli's site says prelims that took hours now take minutes. That may well be true, and it is the easiest benefit to feel. It is not the one that shows up in your profit and loss.

The number that shows up is conversion. Mortgage Professional Australia, reporting on the nineteenth edition of the MFAA Industry Intelligence Service in June 2025, recorded a broker conversion rate of 76.1 per cent, down from 78.1 per cent a year earlier and a long way below the 87.3 per cent peak of mid-2022. The report pointed to a more competitive lending environment and tighter credit assessment, and noted market saturation with the broker population above 22,000.

Roughly one application in four does not settle. Some of that is client behaviour you cannot control. Some of it is a submission to a lender that was never going to say yes. A multi-lender calculator attacks the second category directly, by making it cheap to check ten lenders instead of the two whose spreadsheets you happen to have open.

That is the honest business case. Not the minutes saved on a prelim. The files that never get lodged to the wrong lender, and the client conversations you do not have to reopen.

Where these tools are weakest

A multi-lender calculator is a model of a model. It reproduces each lender's logic. It is not that lender's system. Three failure modes follow from that, and you should plan around all three.

The first is lag. When a lender changes a shading rule, a benchmark, a floor rate or a treatment of a particular income type, there is a window before the aggregated tool reflects it. You will not be notified when you are inside that window.

The second is scope. These tools model serviceability. They do not model credit policy in full, and they cannot see a lender's internal appetite, its current DTI mix against the February 2026 cap, or its assessment queue. A green result is a capacity indication, not an approval signal.

The third is the edge case. Complex trust structures, foreign income, non-standard employment and part-paid contracts are where aggregated models diverge most from the lender's own answer. Those are precisely the scenarios brokers most want a shortcut on, which is an uncomfortable overlap.

The discipline that follows is simple. Use the aggregated tool to shortlist. Run the shortlisted lender's own calculator before you commit a number to a client in writing. That is not a criticism of the category. It is how you use it properly.

How this sits with Best Interests Duty

The best interests duty for mortgage brokers sits in Part 3-5A of the National Consumer Credit Protection Act 2009. ASIC's guidance is Regulatory Guide 273, issued on 24 June 2020, which sets out what ASIC looks for when assessing compliance with those obligations.

A multi-lender calculator helps with the comparison element of that work. It makes it practical to consider a genuine range of lenders rather than the two or three you always use, and it does so at a cost that removes the excuse of it being too time-consuming. That is a real benefit and it is worth saying plainly.

It does not discharge the duty. A screenshot of a borrowing capacity table is not a record of why you recommended a particular product to a particular client. The reasoning is what matters: what you gathered, what you considered, what you recommended and why. The calculator produces an input to that record. It is not the record.

One more caution. Maximum capacity is rarely the deciding factor. The lender at the top of a capacity ranking is frequently not the right recommendation once rate, fees, structure, turnaround and the client's actual circumstances are weighed. A tool that sorts by maximum capacity will nudge you toward the wrong answer if you let the ranking do the thinking.

Specialist, SMSF and alt doc scenarios

The clearest value in these tools is at the edges of the panel, where you have the least practice. Broker Daily reported in August 2025 that Quickli had launched a standalone SMSF serviceability calculator, initially covering Pepper Money, Thinktank, Bluestone, WLTH and RedZed. Quickli co-founder and chief executive Angus Keatinge was quoted saying that SMSF loans are complex enough without brokers having to juggle multiple spreadsheets. The tool was in free beta at the time, with paid subscriptions flagged to follow. It now appears inside the Pro tier on the published pricing page.

That is the shape of the category's growth. Mainstream serviceability comparison has become close to table stakes. The commercial upside for vendors is in the scenarios where the manual work is worst: SMSF, alt doc, self-employed, specialist and non-bank lending.

For a broker, this is the sharpest version of the buying question. If you write two SMSF loans a year, the specialist tier is hard to justify. If you write two a month, it pays for itself the first time you avoid rebuilding a spreadsheet after a lender changes a contribution cap treatment.

How to decide whether it is worth it for your book

Ask how many lenders you currently check on a genuinely uncertain scenario. If the honest answer is two, an aggregated tool will change your submissions and therefore your conversion. If you already run six lender spreadsheets properly on every complex file, it will mostly change your speed, which is worth less.

Ask what proportion of your book is straightforward PAYG on a major lender. For a clean file the major lenders' own calculators are quick, and an aggregated tool adds convenience rather than a different outcome. The value climbs steeply with complexity, and complexity is where the market is heading. Writing in The Adviser in December 2025, Brighten chief executive Jason Azzopardi described a lending environment that is more technical and more sensitive to change than at any point in the past decade.

Ask what one avoided decline is worth. Not in commission alone, but in the client relationship, the second application, and the hours. Price the subscription against that figure rather than against your phone bill.

Finance OS, the publisher of this site, is building comparison tooling for broker software and has not tested any product named in this article. Every price and figure above comes from vendors' published pages or from industry reporting, listed below with dates so you can check them yourself.