Congrats Mighty Efficient!



What we do in an average month through our mighty processing app:

Oncharging over 2,500 hours

Marking up over 1,200 bills

Time Saving

Electricians, Plumbers, Builders, Tradesmen – Spending 3 hours on average a week (mostly unpaid) on: quoting, invoicing, chasing debtors on-charge of materials, checking of supplier statements, paying the bills, paying staff, PAYE/GST returns, dealing with ACC, accountant, IRD, banks etc. And fixing mistakes.


With over 40 years combined experience in bookkeeping, accounting and payroll, we promise to do it properly. We love a simple approach and totally commit to getting it right first time. Because nothing is worse than fixing mistakes.

Our services

Bookkeeping – Making sure the numbers are right so you can:

  • Plan for Tax
  • Plan cashflow
  • Plan capacity
  • Plan workload distribution
  • Plan a holiday

We do all/some for you OR we train you or staff how to do it yourself.

Payroll – We process your payroll pain-free.

Ask us for efficiency gains via online time-sheets. We can also get you the best reporting to assess the value of your staff.


Efficiency App

We have created an efficiency app:

  • Workers log time on the smartphone or tablet
  • We can import supplier bills to apply markups
  • Then we create and check invoices and email them out asap
  • No more guesswork or confusion

We’re stoked to achieve an average of on-charged bills of 95% and on-charged staff time of 90% each month. We don’t go lower than that, so our promise is that you will save money and time!


Wanaka A&P Show

To run the financial side of the Wanaka A&P show is one of Bronwyn's favourite things it seems to me! The amount of work involved to keep the books balanced is increasing each year, we couldn't do it without some mighty efficiency.


We're sparkies - not officeworkers! Anja & Bronwyn and the app let us do what we do best. They get our staff sorted, bills on-charged and paid. All that with minimum interruption to our busy workload, we're all for lean admin!

About us

Anja touched up a bit

Anja O’Connor

After working for chartered accountants for over 20 years Anja is well experienced to comment on small businesses. She provides coaching to companies in the Wanaka area and helps them to implement systems and solutions to solve the same bookkeeping problems she has seen over and over. She loves getting small businesses to understand their business numbers. Apart from number crunching and putting the logic systems cap on, Anja loves mountain biking and personal development.


Bronwyn McCarthy

Bronwyn started her bookkeeping career in the hospitality industry over 20 years ago, from working behind the bar she moved on to the office swiftly. Her no-nonsense and efficient approach to problems means tricky stuff gets sorted quickly. Like regular payroll calculations or PAYE return filing – no dramas, just getting on with it. Bronwyn loves riding her bike and spending time with her family.

Get in touch

  • info@mightyefficient.co.nz
  • 03 443 4912
  • 3 Frederick St
  • PO Box 376, Wanaka 9343