Your Solid Card supports two ways of spending:
Savings Mode (Direct Pay) – spend using your available soUSD savings balance
Borrow Mode – borrow USDC against your yield-bearing savings (soUSD) and spend without selling
Savings Mode (Direct Pay): Spend Your Balance
Savings Mode lets you spend using the USDC that you deposited from your savings to your Solid Card.
If you have USDC in your card balance, purchases are deducted directly from that balance.
How it works
You spend using your USDC card balance
Transactions are deducted instantly
No borrowing involved
No interest charges
Simple and straightforward
Best for
Daily purchases
When you already have USDC on your card
When you don’t want to borrow
Quick, simple spending
Borrow Mode: Keep Your Savings, Spend Anyway
Borrow Mode lets you spend even if you don’t have enough USDC on your card by borrowing against your soUSD savings.
Instead of selling your savings, you use them as collateral to borrow USDC at a low rate.
Your savings continue earning yield while you spend.
How it works
Your soUSD acts as collateral
You borrow USDC at a low APR
Borrowed USDC is sent to your Solid Card
You can repay anytime
Your savings remain invested
Best for
When you don’t want to sell your savings
When you want to keep earning yield
Larger purchases
How Interest Works on Borrowed Card Balances
If you borrow using your Solid Card, the borrowed amount begins accruing interest immediately.
The basics
Borrow APR ≈ 0.9% APY (variable)
Interest starts immediately
No billing cycles
No minimum repayments
Repay anytime
Interest accrues continuously and updates in real time in the app.
How is interest calculated?
Interest compounds continuously based on your borrowed amount.
Example:
If you borrow $100 and keep it borrowed for a full year at 0.9% APY, you would owe approximately $100.90 after one year.
At the same time, your soUSD savings may be earning around 6.5% APY, meaning your savings are growing faster than your borrowing cost.
When do I owe interest?
You owe interest as long as you have an outstanding borrowed balance.
The longer you keep the loan open, the more interest accrues.
Repaying early reduces how much interest you pay.
What will I see in the app?
Current borrowed balance
Accrued interest (real time)
Current borrow rate
Available borrowing power
All values update automatically.
Safety & Borrow Limits
Borrow limit ≈ 70% LTV
Collateral: soUSD (yield-bearing stablecoin)
Designed for stability, not speculation
Liquidation risk is extremely low
soUSD is a stable, yield-bearing asset designed to steadily increase in value.