diff --git a/esphome/components/pcf8574/pcf8574.cpp b/esphome/components/pcf8574/pcf8574.cpp
index 5da6f92aae..a75f4f2256 100644
--- a/esphome/components/pcf8574/pcf8574.cpp
+++ b/esphome/components/pcf8574/pcf8574.cpp
@@ -99,6 +99,9 @@ bool PCF8574Component::write_gpio_() {
 }
 float PCF8574Component::get_setup_priority() const { return setup_priority::IO; }
 
+// Run our loop() method early to invalidate cache before any other components access the pins
+float PCF8574Component::get_loop_priority() const { return 9.0f; }  // Just after WIFI
+
 void PCF8574GPIOPin::setup() { pin_mode(flags_); }
 void PCF8574GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
 bool PCF8574GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
diff --git a/esphome/components/pcf8574/pcf8574.h b/esphome/components/pcf8574/pcf8574.h
index fdeee1800d..41cb411f28 100644
--- a/esphome/components/pcf8574/pcf8574.h
+++ b/esphome/components/pcf8574/pcf8574.h
@@ -25,6 +25,7 @@ class PCF8574Component : public Component, public i2c::I2CDevice {
   void pin_mode(uint8_t pin, gpio::Flags flags);
 
   float get_setup_priority() const override;
+  float get_loop_priority() const override;
 
   void dump_config() override;