Clarity. Control. Progress.

Strategic accounting for personal tax, small business, property investors and SMSFs across Melbourne and Victoria.

Being compliant with the ATO is only the starting point. Our job is to give you clarity around your numbers, help you stay in control of your obligations and set you up for progress over time. Whether you're running a business, building a property portfolio or planning for retirement, we help you keep more of what you earn and protect what you've built.

Helping small business succeed

Practical, proactive accounting support that brings clarity to your numbers, keeps you in control of compliance and improves your after-tax profit.

Who we help

We focus on people who value clear explanations, control over their financial position and steady progress with a long-term accounting partner.

Employees & professionals

You put time and energy into your career. We make sure you're not handing extra money to the ATO. From work-related deductions to shares, bonuses and investment income, we help you lodge correctly and plan ahead with more clarity.

  • Work-related expenses and allowances
  • Multiple income streams (shares, bonuses, side income)
  • Rental properties and capital gains

Personal tax returns

Small business owners

Business owners don't just need forms lodged. You need structure, cashflow, compliance and tax all pulling in the same direction so you can stay in control and grow with less stress.

  • Choice and review of business structure
  • BAS, GST, payroll and PAYG
  • Cashflow and profit planning

Small business services

Property investors

Property can build wealth, but only if the numbers stack up. We translate the tax rules into plain English so you can see the true after-tax position and plan your next move with confidence.

  • Negative gearing and cashflow analysis
  • Depreciation schedules and building write-offs
  • CGT planning when you sell

Property & negative gearing

SMSF trustees & pre-retirees

Taking control of your super comes with responsibilities. We help with the tax and reporting side so you can focus on the bigger decisions with your adviser and progress your retirement plans.

  • SMSF tax returns and compliance
  • Pension strategies with your adviser
  • Planning for retirement and drawdown

SMSF and retirement services

Families, estate planning & wealth protection

Once you've built some wealth, the question becomes how to protect it and pass it on cleanly. We help you think through tax, structure and risk so your estate plan actually works in practice – not just on paper.

  • Estate planning in conjunction with your lawyer
  • Trusts and asset-protection structures
  • Tax-effective intergenerational transfers

A key part of this work is delivered through our sister business, Mastin Harris Family Wealth Protection, which focuses on protecting families and their assets.

Learn more at Mastin Harris Family Wealth Protection

What we do

More than just tax returns. Practical advice that gives you clarity, control and progress across business, property, super and estates.

Small business accounting & tax

Ongoing support for BAS, payroll, year-end accounts and tax planning so you can focus on running the business while staying in control of your obligations.

View small business services

Personal tax returns

Maximise your refund, stay compliant, and plan ahead for future years with careful, thorough preparation and clear explanations of what's driving your outcome.

View personal tax services

Property & negative gearing

See the real after-tax cost of your properties and plan for CGT in advance so your portfolio supports your long-term goals.

View property services

SMSFs & retirement

Keep your SMSF compliant and aligned with your broader tax and estate plans so your retirement strategy stays on track.

View SMSF services

Quick tools & calculators

Rough guides to help you understand your position before we talk. For tailored advice and real progress, the next step is a conversation.

Estimate your tax outcome

Get a rough sense of whether you might be in line for a refund or a payable this year, including a standard 2% Medicare levy.

Negative gearing impact

See a rough after-tax picture of one investment property based on your income, rent and expenses.

SMSF readiness checklist

Answer a few questions to see whether it may be worth exploring an SMSF further with your adviser.

Open tools & calculators

About Mastin Harris Accountants

Practical accountants who look beyond the numbers.

We're a Victorian accounting firm focused on helping small business owners, property investors and families make better decisions. We look at the full picture – structure, tax, cashflow and risk – to give you clearer options, more control and better progress over time, not just a once-a-year tax return.

Learn more about us

Ready for more clarity and control?

Choose professional accounting support that helps you grow your wealth and reduce your tax – with practical, helpful advice that actually makes a difference to your financial position.