Refinancing with splits already running? What to replicate at the new lender, what to document, and how a clean deductible split gets merged into a mixed-purpose loan by accident.
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A refinance moves the debt, the security and the account numbers. What it does not move is the history that supports the deduction:
Interest is generally deductible to the extent the borrowed money was used to produce assessable income. That purpose was fixed the moment you drew the funds and bought the assets, and it does not reset because a different lender now holds the mortgage. What the new lender controls is whether the money it advances can still be traced to that same purpose.
The Australian Taxation Office (ATO) treats a borrowing used to repay an earlier borrowing as taking on the character of the debt it replaces. Advance $280,000 from the incoming lender, send it straight to the outgoing lender to clear a $280,000 investment split, and the new split continues the old one, which is the treatment the ATO sets out for refinancing a mixed-purpose debt.
The deductible split at the new lender can be no larger than the amount it repays. Borrow $300,000 to clear a $280,000 investment split, and the extra $20,000 is new borrowing, deductible only where it is used for an income-producing purpose in its own right.
Your outgoing lender has no obligation to keep your statements once an account closes, and the incoming lender starts with a balance and no story behind it. A review five years from now looks at drawdown dates, amounts and destinations. Nobody in the transaction keeps that for you, so the refinance is when you collect it.
The target is the structure you already have. Changes to the shape of the lending belong before or after the move, not inside it:
One split out, one split in, at the same balance to the dollar. A household running a home split and two investment splits from separate recycling tranches needs three accounts at the new lender, not a home split and one combined investment split. Merging two deductible splits does less damage than mixing purposes, though it costs you the tranche history your accountant uses to tie each drawing to the assets it bought.
Redraw belongs on the investment splits, because that is how the next tranche is drawn. The offset belongs against the non-deductible home split, where reducing the interest charged costs you no deduction. New lenders sometimes attach the offset to the largest account by default, which is often the investment split. Correcting it before settlement is simpler than after.
An investment split running interest-only and a home split running principal and interest need to arrive that way. Some lenders reassess interest-only terms at refinance and default the whole facility to principal and interest, which starts paying down the deductible balance you were deliberately leaving intact. Interest-only carries its own pricing and policy limits, so confirm the term.
Repayments on each split should leave the same account they left before, which matters most where the investments are held in one partner's name. A new lender that sets up a single direct debit across every split from a joint account changes the evidence of who bore the cost, and that evidence carries weight when the loan and the asset sit in different names.
Account nicknames are cosmetic to the lender and useful to everyone else. Labelling each account by purpose and tranche, such as home, investment 2023 and investment 2025, means a statement pulled years later identifies itself. It costs nothing at setup and saves your accountant reconstructing the structure from balances alone.
A refinance is a fresh application, assessed on today's income and today's policy. An established structure can be harder to place than it was to build:
The Australian Prudential Regulation Authority (APRA) requires lenders to assess repayments at a rate at least 3 percentage points above the actual rate, and it has kept that setting in place through its recent macroprudential reviews. A household carrying $700,000 across a home split and an investment split is assessed on the whole balance at the buffered rate, not on the home portion alone.
Dividends and distributions from the recycled portfolio are income, and most lenders shade them, commonly counting around 80% and often asking for two years of evidence. Where the portfolio was built recently, that income may not count at all. The strategy's own returns rarely carry an application.
Where a refinance is like-for-like, with no increase in the limit and no increase in repayments, some lenders apply a modified assessment using a smaller buffer and lean on the borrower's own repayment history. APRA has told banks these exceptions must stay limited and prudently managed, so this is discretion at the lender's end and not an entitlement. Ask whether it applies where servicing is tight.
Lenders differ on how many splits they allow, whether each carries a fee and whether every split gets its own account number. A four-account structure fits a lender that permits six and forces a merge at one that caps splits at three, so the loan features for debt recycling decide which lenders are usable.
Lenders code each split as owner-occupied or investment for pricing and reporting, based on the purpose of the funds and not the security behind them. An investment split secured by your home is still investment lending, and coding it owner-occupied to chase a lower rate puts the application at odds with the deduction you claim. Price the structure honestly, and the two records agree.
None of these is deliberate. Each one comes from a system default, a rounding habit or a well-meant tidy-up:
Consolidation is the standard refinance recommendation, and it is the wrong one here. A single $700,000 loan replacing a $420,000 home split and a $280,000 investment split becomes a mixed-purpose account on the day it settles. Interest then has to be apportioned on a fair and reasonable basis for as long as that loan exists, and no later restructure undoes the mixing.
Payout figures include interest accrued to settlement and any discharge costs, so the amount required on the day is not the balance you last saw on a statement. A $283,417 payout then becomes a $285,000 split because the number reads better. That $1,583 difference is fresh borrowing with no investment purpose behind it, sitting inside an account that was otherwise fully deductible, and the apportionment applies to every dollar of interest from that point on.
Households often take equity at refinance for renovations, a vehicle or the next tranche. Adding it to an existing investment split puts private borrowing and investment borrowing in one account. A separate split for the cash out costs nothing at most lenders and keeps that borrowing out of the deductible account.
Application fees, valuation costs and any Lenders Mortgage Insurance (LMI) premium are often capitalised into the loan, and lenders tend to add them to the largest account. Where that account is the investment split, costs attributable to the home portion end up funded by deductible borrowing. Direct capitalised costs to the split they relate to, and have your accountant confirm how each is treated.
Where the new split draws before the old one is repaid, or the funds route through a transaction account or an offset on the way, the connection between the two borrowings weakens. Same-day, account-to-account payout is what the trail depends on. It is arranged by the incoming lender's settlement agent, so it has to be requested in advance.
The figures below are illustrative and follow one household to show where a merge costs money. Assume a $420,000 home split and a $280,000 investment split, both variable at 6.2%, refinanced at the same total balance, with $30,000 a year directed at the non-deductible debt and a 39% marginal rate including the 2% Medicare levy:
Two new splits open at $420,000 and $280,000. The investment split carries $17,360 of interest in the first year, worth about $6,770 as a deduction. Every dollar of the $30,000 lands on the home split, which falls to $390,000, while the deductible balance holds at $280,000 and stays available to recycle against.
One $700,000 loan replaces both, 40% of it attributable to the investment borrowing. Total interest of $43,400 apportions to the same $17,360 deductible in year one, so nothing looks wrong on the first return. The $30,000 repayment, however, is applied across both purposes in that same 40/60 ratio, taking $12,000 off a deductible balance the household never intended to reduce.
Five years of apportioned repayments widen the gap:
| Position after 5 years | Two splits replicated | One consolidated loan |
|---|---|---|
| Non-deductible balance | $270,000 | $330,000 |
| Deductible balance | $280,000 | $220,000 |
| Interest attracting a deduction | $17,360 | $13,640 |
| Value of that deduction at 39% | $6,770 | $5,320 |
Illustrative only and a general guide. The figures ignore scheduled principal repayments, rate movements and portfolio income, and they are not a forecast or a promise of any result.
The first-year deduction is identical in both columns, which is why a merge is rarely noticed when it happens. Holding $280,000 of deductible debt is also holding $280,000 of borrowing secured against your home, and a portfolio that falls does not reduce it. Only the replicated structure lets you attack the non-deductible side and recycle the next tranche without unpicking an account first.
The incoming lender needs almost none of this. Your accountant needs all of it, and the moment to gather it is while both lenders still hold the records:
Request a final statement for each account at the outgoing lender, showing the closing balance and the payout. Statements are usually available for a limited period after an account closes, and retrieving them later can attract a fee or prove impossible. Save them at settlement, not at tax time.
The deduction rests on what the original borrowing bought, so the drawdown evidence matters more than the refinance itself. Transfer confirmations, the contract notes from your share broker or platform and the dates on each should already be filed. A refinance is a sensible point to confirm your record-keeping for debt recycling is complete.
The settlement statement showing which new split paid out which old split is the single document connecting the two structures. Ask the incoming lender's settlement agent for it in writing. Without it, the argument that the new split continues the old one rests on memory.
Your loan contract and schedule identify each split, its limit, its stated purpose and its account number. Send it to your accountant as soon as it arrives, because the account numbers behind the return change from that year forward, and a mismatch between the return and the statements is the sort of thing that prompts a query.
Where a split already carries a mixed purpose from an earlier misstep, the percentage in use travels with it, and it needs to reach the new structure intact.
General guide only. What each lender retains, and for how long, varies by institution, and your accountant will tell you what your own file needs.
The structural decisions land early and the irreversible ones land on settlement day:
Split count, balances, redraw placement and repayment type are mapped before the application goes anywhere. Lenders build the facility from what was submitted, and adding a fourth split after approval means a variation, a delay and sometimes a fresh assessment. The structure is cheaper to specify than to correct.
Each lender uses its own discharge authority form, and processing commonly takes 10 to 21 business days from the moment it is received. Allowing about four weeks before the intended settlement date is the usual guidance, and an incomplete form restarts that clock. Lodging the authority alongside the application keeps both timelines together.
Payout figures are issued per account and move when the settlement date moves. Confirm a figure for each split separately, because a single combined figure is where two accounts quietly become one.
Settlement runs electronically through Property Exchange Australia (PEXA), with the incoming lender's mortgage registered as the outgoing lender's is discharged. Funds move between the two lenders on the day, which is what keeps each payout direct.
The first statements are where setup errors surface. Confirm that each split opened at the balance it was meant to, that the offset is attached to the home split, that redraw is available on the investment splits and that the repayment type on each matches what was agreed. Corrections are straightforward in the first month and awkward once interest has been apportioned.
Timeframes are a general guide. Lender processing times and settlement scheduling vary, and your own dates depend on both lenders and the settlement platform.
You are not starting the strategy again. The purpose behind each dollar was fixed when you drew it, and it holds while each payout is direct and each split stays separate. What threatens it are default settings nobody chose, and a structure specified before the application overrides them.
Handled that way, the refinance is administration. Your accountant sees the same splits under new account numbers, your financial adviser sees a portfolio the move did not touch, and your next tranche recycles the way it always has.
Kingfisher Finance Group works with households already running splits, mirroring the structure account by account at the incoming lender and coordinating with your accountant so the trail holds through settlement. The free estimate is a starting point before you sign a discharge authority.
Book a free call →It can, and that is the outcome to avoid. One facility repaying a deductible split and a non-deductible split becomes a mixed-purpose loan, and the interest then has to be apportioned on a fair and reasonable basis for the life of that loan. Ask for one new split per old split.
They should match the payout figure on the account they repay, which includes interest accrued to settlement. Sizing a split above that figure adds fresh borrowing to an otherwise deductible account, and the purpose of that extra amount is judged on what it is used for.
Take it as a separate split. Most lenders allow additional splits at no cost, and keeping the cash out in its own account keeps its purpose separate from the investment borrowing. Adding it to an existing deductible split mixes purposes from the day it settles.
Yes, on both pricing and assessment. Lenders code splits by the purpose of the funds, so a split used to buy shares is investment lending even though your home is the security, and it usually prices above the owner-occupied portion. Both splits count in full when the lender tests your repayments at the buffered rate.
Allowing about four weeks for the discharge alone is the usual guidance, and the whole process commonly runs longer once the application, valuation and document return are counted. Extra splits add setup steps, not weeks. The real variable is your outgoing lender's discharge queue, which is why the authority is worth lodging early.
Sometimes, and it is one of the few clean opportunities to do so. Where an account carries both deductible and non-deductible borrowing, the ATO ruling contemplates refinancing that debt into two new accounts matching the income-producing and private portions, with the deductible side then treated as fully deductible. Your accountant sets the percentages.
Your registered tax agent gives the tax position, working from the settlement statement, the closing statements and the original drawdown records. Your financial adviser reviews the portfolio, which a refinance does not touch. Your broker's part is arranging the payout split by split and confirming each new account opens as specified, and that is the evidence the other two rely on.
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