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How Ben Carlson Refinanced His HELOC at Half the Rate

Joseph Wang

Key Takeaways

  • Ben borrowed at 3.8%* through SyntheticFi to pay off a 7% HELOC, cutting his rate nearly in half with no monthly payment.

  • The process took days, not weeks, with minimal paperwork compared to traditional mortgage lending.

  • Without the HELOC payment, he redirected that cash flow into savings, borrowing cheaper and saving more simultaneously.

  • He tested SyntheticFi on himself before recommending it to clients at Ritholtz Wealth Management.

Ben Carlson, CFA, is Director of Institutional Asset Management at Ritholtz Wealth Management and the writer behind A Wealth of Common Sense. He's also a SyntheticFi investor, a fact he disclosed upfront when he sat down to interview SyntheticFi co-founder Joseph Wang on the Talking Wealth podcast — you can listen to the full episode here.

Before recommending SyntheticFi to clients, Ben and his colleague Michael Batnick wanted to test it on themselves. "We decided to be the guinea pigs," Ben said. "We wanted to see how the process works before letting our clients use it."

Ben had recently done a big house renovation and financed it with a home equity line of credit at roughly 7%. Every month, he owed a minimum payment covering at least the interest. The loan worked fine. But the rate could've been better.

He borrowed through SyntheticFi for three years at 3.8%, paid off the 7% HELOC, and eliminated the monthly payment. He picked the term, liked the rate, confirmed, and SyntheticFi executed the trade almost immediately. 

The money was there the following day. Ben described the whole thing as an effective refinance and said it was "really easy."

"You're not going through a mortgage department filling out a bunch of paperwork," Ben said. "'Send us your W-2, send us your income, fill out all these forms.' The paperwork is relatively minimal."

With no monthly HELOC payment to make, Ben started redirecting that cash into his brokerage account, increasing his savings rate while borrowing at a fraction of what he'd been paying before.

Ben is aware of the risks, but finds them comparable to any securities-backed lending product out there. Rates could be higher when the loan matures, a sharp enough market drawdown could trigger a margin call. "There are risks to taking leverage," Ben said. "You have to work with clients who understand how this works. It's not free just because it's a low rate—it's still a form of leverage."

Ben now confidently uses SyntheticFi for clients at Ritholtz Wealth. "For a lot of people seeing it for the first time, it seems too good to be true," he said. "But it's a really interesting way to use your assets more efficiently if you need the cash flow."

Interested in learning more about how SyntheticFi works with advisors? → Set up a call with our team today.

Want to hear Ben walk through the whole experience in his own words? Listen to the full conversation on the Talking Wealth podcast

Disclosure: Ben Carlson is a SyntheticFi client. His firm, Ritholtz Wealth Management, is an investor in SyntheticFi, creating a conflict of interest. He was not compensated. This testimonial may not be representative of all clients and does not guarantee future results. Rates may vary.

156 2nd St, Suite 610
San Francisco, CA 94105
(628) 800-0898

Backed by

SyntheticFi LLC is an investment advisor registered with the U.S. Securities and Exchange Commission (SEC). SyntheticFi does not provide tax, legal or accounting advice. This material has been prepared for informational purposes only, and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. You should consult your own tax, legal and accounting advisors before engaging in any transaction. Investing carries inherent risks, and investment outcomes are not guaranteed unless stated otherwise. Before adopting any investment strategy, we strongly recommend consulting with a qualified financial advisor and/or tax professional.

All interest rate and tax information is current as of 05/12/2026 and reflects SyntheticFi’s best market estimates. Rates shown are indicative only; SyntheticFi does not guarantee execution at the quoted implied interest rates.

*Rates displayed are illustrative and subject to market changes. Not including SyntheticFi's fees.

†The interest rate and tax deduction savings interactive tool is for illustrative purposes only. Calculations assume interest rate savings equal to 2% of the loan amount and potential tax savings equal to 1% of the loan amount. Actual savings may vary based on market conditions, loan structure, tax circumstances, and individual client eligibility. Savings estimates are based on generalized assumptions and do not constitute tax, legal, or investment advice. Users should consult with their own financial or tax advisors to assess the applicability of any savings in their personal circumstances. This tool does not recommend or favor any specific investment and does not evaluate or compare a universe of alternative lending or investment options. Other financial solutions not analyzed here may offer similar or greater benefits.

‡APR, or the Annual Percentage Rate, disclosed above is calculated in accordance with the federal Truth in Lending Act (Regulation Z) guidelines and reflects the estimated total cost of borrowing, inclusive of the maximum fees charged by SyntheticFi that is subject to discount. This is not a rate guarantee. This APR represents the nominal interest rate annualized over monthly compounding periods and incorporates all mandatory periodic payments and final payoff obligations associated with the loan.

We are committed to full transparency and compliance; this rate enables an apples-to-apples comparison with other financing options by including both interest and applicable service fees in accordance with regulatory standards.

You can check the background of SyntheticFi LLC on the website of the SEC. Please refer to our Form CRS and Firm Brochure for important disclosures.

By using syntheticfi.com, you accept our Terms of Use and Privacy Policy.

156 2nd St, Suite 610
San Francisco, CA 94105
(628) 800-0898

Backed by

SyntheticFi LLC is an investment advisor registered with the U.S. Securities and Exchange Commission (SEC). SyntheticFi does not provide tax, legal or accounting advice. This material has been prepared for informational purposes only, and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. You should consult your own tax, legal and accounting advisors before engaging in any transaction. Investing carries inherent risks, and investment outcomes are not guaranteed unless stated otherwise. Before adopting any investment strategy, we strongly recommend consulting with a qualified financial advisor and/or tax professional.

All interest rate and tax information is current as of 05/12/2026 and reflects SyntheticFi’s best market estimates. Rates shown are indicative only; SyntheticFi does not guarantee execution at the quoted implied interest rates.

*Rates displayed are illustrative and subject to market changes. Not including SyntheticFi's fees.

†The interest rate and tax deduction savings interactive tool is for illustrative purposes only. Calculations assume interest rate savings equal to 2% of the loan amount and potential tax savings equal to 1% of the loan amount. Actual savings may vary based on market conditions, loan structure, tax circumstances, and individual client eligibility. Savings estimates are based on generalized assumptions and do not constitute tax, legal, or investment advice. Users should consult with their own financial or tax advisors to assess the applicability of any savings in their personal circumstances. This tool does not recommend or favor any specific investment and does not evaluate or compare a universe of alternative lending or investment options. Other financial solutions not analyzed here may offer similar or greater benefits.

‡APR, or the Annual Percentage Rate, disclosed above is calculated in accordance with the federal Truth in Lending Act (Regulation Z) guidelines and reflects the estimated total cost of borrowing, inclusive of the maximum fees charged by SyntheticFi that is subject to discount. This is not a rate guarantee. This APR represents the nominal interest rate annualized over monthly compounding periods and incorporates all mandatory periodic payments and final payoff obligations associated with the loan.

We are committed to full transparency and compliance; this rate enables an apples-to-apples comparison with other financing options by including both interest and applicable service fees in accordance with regulatory standards.

You can check the background of SyntheticFi LLC on the website of the SEC. Please refer to our Form CRS and Firm Brochure for important disclosures.

By using syntheticfi.com, you accept our Terms of Use and Privacy Policy.

Backed by

SyntheticFi LLC is an investment advisor registered with the U.S. Securities and Exchange Commission (SEC). SyntheticFi does not provide tax, legal or accounting advice. This material has been prepared for informational purposes only, and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. You should consult your own tax, legal and accounting advisors before engaging in any transaction. Investing carries inherent risks, and investment outcomes are not guaranteed unless stated otherwise. Before adopting any investment strategy, we strongly recommend consulting with a qualified financial advisor and/or tax professional.

All interest rate and tax information is current as of 05/12/2026 and reflects SyntheticFi’s best market estimates. Rates shown are indicative only; SyntheticFi does not guarantee execution at the quoted implied interest rates.

*Rates displayed are illustrative and subject to market changes. Not including SyntheticFi's fees.

†The interest rate and tax deduction savings interactive tool is for illustrative purposes only. Calculations assume interest rate savings equal to 2% of the loan amount and potential tax savings equal to 1% of the loan amount. Actual savings may vary based on market conditions, loan structure, tax circumstances, and individual client eligibility. Savings estimates are based on generalized assumptions and do not constitute tax, legal, or investment advice. Users should consult with their own financial or tax advisors to assess the applicability of any savings in their personal circumstances. This tool does not recommend or favor any specific investment and does not evaluate or compare a universe of alternative lending or investment options. Other financial solutions not analyzed here may offer similar or greater benefits.

‡APR, or the Annual Percentage Rate, disclosed above is calculated in accordance with the federal Truth in Lending Act (Regulation Z) guidelines and reflects the estimated total cost of borrowing, inclusive of the maximum fees charged by SyntheticFi that is subject to discount. This is not a rate guarantee. This APR represents the nominal interest rate annualized over monthly compounding periods and incorporates all mandatory periodic payments and final payoff obligations associated with the loan.

We are committed to full transparency and compliance; this rate enables an apples-to-apples comparison with other financing options by including both interest and applicable service fees in accordance with regulatory standards.

You can check the background of SyntheticFi LLC on the website of the SEC. Please refer to our Form CRS and Firm Brochure for important disclosures.

By using syntheticfi.com, you accept our Terms of Use and Privacy Policy.

156 2nd St, Suite 610
San Francisco, CA 94105
(628) 800-0898

Backed by

SyntheticFi LLC is an investment advisor registered with the U.S. Securities and Exchange Commission (SEC). SyntheticFi does not provide tax, legal or accounting advice. This material has been prepared for informational purposes only, and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. You should consult your own tax, legal and accounting advisors before engaging in any transaction. Investing carries inherent risks, and investment outcomes are not guaranteed unless stated otherwise. Before adopting any investment strategy, we strongly recommend consulting with a qualified financial advisor and/or tax professional.

All interest rate and tax information is current as of 05/12/2026 and reflects SyntheticFi’s best market estimates. Rates shown are indicative only; SyntheticFi does not guarantee execution at the quoted implied interest rates.

*Rates displayed are illustrative and subject to market changes. Not including SyntheticFi's fees.

†The interest rate and tax deduction savings interactive tool is for illustrative purposes only. Calculations assume interest rate savings equal to 2% of the loan amount and potential tax savings equal to 1% of the loan amount. Actual savings may vary based on market conditions, loan structure, tax circumstances, and individual client eligibility. Savings estimates are based on generalized assumptions and do not constitute tax, legal, or investment advice. Users should consult with their own financial or tax advisors to assess the applicability of any savings in their personal circumstances. This tool does not recommend or favor any specific investment and does not evaluate or compare a universe of alternative lending or investment options. Other financial solutions not analyzed here may offer similar or greater benefits.

‡APR, or the Annual Percentage Rate, disclosed above is calculated in accordance with the federal Truth in Lending Act (Regulation Z) guidelines and reflects the estimated total cost of borrowing, inclusive of the maximum fees charged by SyntheticFi that is subject to discount. This is not a rate guarantee. This APR represents the nominal interest rate annualized over monthly compounding periods and incorporates all mandatory periodic payments and final payoff obligations associated with the loan.

We are committed to full transparency and compliance; this rate enables an apples-to-apples comparison with other financing options by including both interest and applicable service fees in accordance with regulatory standards.

You can check the background of SyntheticFi LLC on the website of the SEC. Please refer to our Form CRS and Firm Brochure for important disclosures.

By using syntheticfi.com, you accept our Terms of Use and Privacy Policy.