1040 Abroad Reviews 

EDITED TO ADD Dec 23 2025:

Olivier of 1040 Abroad reached out and paid the penalties on the late fees incurred due to my case falling through the cracks in their process.

He mentioned that regardless of my review, he wanted to make things right. As a business owner, I fully understand that mistakes happen. I wanted to take a moment and acknowledge my appreciation for businesses like these with integrity.


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I had used 1040 Abroad in 2024 as a US citizen living abroad full time. Things went well so I decided to use them again for 2025. Biggest mistake I ever made. Note that I have NEVER been late in filing my taxes.

This all happened despite an onboarding call PRIOR to doing my taxes. I had explained before hand that my taxes are complicated for 2025 due to living in two countries, sale of properties and running two separate businesses.

Let me save you the pain.

1. I submitted my taxes at least a month in advance like I normally do. 1040 gave me literally 2 days before the deadline to confirm and file my taxes even though I had asked for it the week before.

2. There were zero questions asked despite the sale and purchase of multiple properties and including the sale of my primary home which would allow for a 250k deduction. This was not included in my taxes.

3. The taxes I owed were astronomical due to #2 above.

4. They asked me, the client a basic non-negotiable tax filing question on which tax option I wanted to file (with K1 or without K1?) - When I asked for a second opinion, my usually polite and calm US based business accountant wrote back to me: "That’s the dumbest damn question ever. You HAVE TO FILE with the K1."

5. My taxes were filed late due to this back and forth with zero guidance on what to do.

6. I now owe thousands in late fees.

I can't even begin to tell you how incompetent these people are. And they only have ONE job to do: Taxes for citizens living abroad. You truly can't make this stuff up.

I would give it 10 Stars if I could! ✶✶✶✶✶✶✶✶✶✶ 1040 Tax Service is more efficient than tax services that cost twice as much. It is very professional and secure with a Private Portal. I've used it for several years now and always been pleased. I wish I could have found it years ago. Thank you.

Very helpful, patient and understanding, made it clear what I needed to do, explained everything well, and responded very quickly.

Prompt responses to questions, and fantastic service.

Olivier and his team help make it strait forward to file taxes. I am dual UK/USA and have used them for 3 years now. Thank you 1040

They were knowledgeable and answered all the questions I had about my taxes and Form 5471 in particular. Their prices are very reasonable too.

I've been going to Olivier for my US expat tax questions for the past year. For comparison, I reached out to about 4 other tax firms as well, including one that specialized in taxes for Americans in my new country. There was absolutely no comparison. Olivier was faster at responding, gave more comprehensive and understandable answers, and was extremely cost effective compared to all the others. I thought it was a good idea to use my local tax firm, but I ended up going back to Olivier to review their work anyway. DO YOURSELF A HUGE FAVOR AND USE 1040 ABROAD.

1040 Abroad offers an expat service that is responsive, responsible, efficient, and trustworthy. I will be recommending 1040 Abroad in the future!

As an American Abroad I use 1040 Abroad to help me file my US taxes.

I've done so for at least the past 7 years with them.
The process is easy, you fill out their spreadsheet with your information and they prepare the tax forms for your review. When you agree, they file them electronically and you get proof of filing.

They have a specific understanding of US tax issues for US citizens living abroad, which is a relief. They know what you need and will respond.

I wholeheartedly recommend them.

I can't express enough gratitude for the exceptional tax services I received from 1040abroad, led by the knowledgeable Olivier.

I had last 4 years IRS tax returns pending and my tax situation was complex involving CFC ownership, diverse income sources, stock trading, dividends, PFIC investment and the intricacies of forms like 5471 and GILTI. At first, I felt overwhelmed, but Olivier and Jovan navigated these complexities with remarkable precision.

One standout aspect is their promptness. Jovan has responded to my queries almost immediately, which is an invaluable quality during tax season. They made me feel like a top priority, which is incredibly reassuring.

Their fees are not just reasonable; they are really fair, especially considering the level of accuracy and expertise that comes with their tax services.

The team's deep knowledge of tax laws is commendable. What’s equally impressive is their commitment to on-time services. Once you avail their services you don’t need to worry about tax deadline.

"In summary, 1040abroad and Olivier provide exceptional and reasonably priced tax services, backed by their promise to deal with the IRS, accuracy, and on-time delivery.Their promptness and professionalism truly make them a standout team."

I am deeply grateful for their support and will continue to be a loyal client for years to come.

I recommend everyone to experience their expertise, prompt service, and fair pricing – it's a choice you won't regret."

Excellent service, friendly and efficient. Olivier and 1040 Abroad does everything to make it easy. What a relief to feel in compliance with something as important as filing taxes!

Olivier and everyone on his team have consistently provided me with timely and accurate advice and service with completing both my USA and Canadian tax returns and reviewing my records to insure compliance with US tax laws. I have - and will continue to - recommend 1040 Abroad to anyone trying to deal with US government from outside of the country.

You should definitely use 1040 Abroad to do your taxes. Quick and efficient for a reasonable price. I've been using them for several years now and wish I would have found them sooner!

They are quick and responsive to questions. Willing to consider alternatives. The fees are transparent

As a dual Irish and American citizen, I have used 1040 for a couple of years to comply with US taxation laws.

Olivier Wagner and his team do exactly what they promise to do- making tax compliance and filing from abroad fairly effortless.

I was VERY impressed with Olivier Wagner. Professional, knowledgeable. He answered all questions succinctly and accurately and timely. I would not hesitate to recommend Olivier.

Olivier was an fount of knowledge, helping us to unravel the complexities of filing US tax returns for a US citizen married to a Canadian spouse. Great future planning advice as well. His completion of the US returns was quick and accurate from the jumble of information we had for him. What a relief!! Highly recommended

The team at 1040 Abroad made filing my back taxes after the deadline so much less painful than I had expected the process to be! They have real human beings who replied my messages with my unique concerns. An error on their part was fixed quickly and they were courteous and apologetic. Olivier subsequently went beyond his call of duty to assist me with an error on MY part. You can trust these guys. They get it. I will keep working with them again next year and beyond!

Olivier and the 1040 Abroad team are the best. I've been working with them to file my taxes for 4 years now since being abroad and am so impressed with their professionalism, knowledge, and speed. Doing taxes can be scary and confusing, especially abroad, but they are so patient and always answer all my questions and make it so easy. They don't just treat you like another customer, they treat each person as an individual and approach their case as such. Their pricing is well worth it for their service, and I'm so happy with them I've referred them to all of my friends who live abroad (outside the U.S.), who also now use 1040 every year and recommend it to their friends. Thank you team 1040!

Knowledgeable, friendly staff. Quick to answer all questions, they will put your mind at ease when dealing with complicated tax issues that all US citizens living abroad may face. Highly recommended.